Dr Robert Jeffrey

Research Associate

School of Engineering (Chemical Engineering)

Career Summary

Biography

Research Expertise

Effect of direction on atmospheric Corrosion, Bacterial involvement in corrosion, Marine Corrosion in immersion and tidal conditions, Effect of time and location on the corrosion profiles of steel sheet piling in Australian harbours.


Qualifications

  • PhD, University of Newcastle
  • Bachelor of Engineering, University of Newcastle

Keywords

  • Corrosion
  • Materials Engineering

Fields of Research

Code Description Percentage
091199 Maritime Engineering not elsewhere classified 80
091299 Materials Engineering not elsewhere classified 15
091499 Resources Engineering and Extractive Metallurgy not elsewhere classified 5

Professional Experience

UON Appointment

Title Organisation / Department
Research Associate University of Newcastle
School of Engineering
Australia
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Journal article (20 outputs)

Year Citation Altmetrics Link
2014 Melchers RE, Jeffrey RJ, 'Long-term corrosion of mild steel in natural and uv-treated coastal seawater', Corrosion, 70 804-818 (2014) [C1]

Highly polished coupons (25 by 25 by 1.5 mm) sourced from the same steel sheet were continuously immersion-exposed either to natural coastal seawater or to seawater from the same ... [more]

Highly polished coupons (25 by 25 by 1.5 mm) sourced from the same steel sheet were continuously immersion-exposed either to natural coastal seawater or to seawater from the same source subjected to filtration and UV irradiation to eliminate microbiologically influenced corrosion as much as possible. This was continued for 943 days (2.6 years). Dissolved oxygen levels were very similar in both environments. On average the UV-treated seawater was 2°C warmer, but all coupons exposed to it showed less localized corrosion than those exposed to natural seawater. The typical topographical difference was about 60% as measured by surface roughness parameter Sa. Mass losses in UV-treated seawater were about 10% higher than in natural seawater, but after temperature correction were similar to natural seawater for the first year and tended to be lower subsequently. At all exposure periods the rusts in UV-treated seawater were less voluminous than the rusts in natural seawater. Eventually they also contained a higher proportion of magnetite. © 2014, NACE International.

DOI 10.5006/1122
Citations Scopus - 2
Co-authors Rob Melchers
2014 Machuca LL, Jeffrey R, Bailey SI, Gubner R, Watkin ELJ, Ginige MP, et al., 'Filtration-UV irradiation as an option for mitigating the risk of microbiologically influenced corrosion of subsea construction alloys in seawater', CORROSION SCIENCE, 79 89-99 (2014) [C1]
DOI 10.1016/j.corsci.2013.10.030
Citations Scopus - 7Web of Science - 3
2014 Melchers RE, Jeffrey RJ, Usher KM, 'Localized corrosion of steel sheet piling', Corrosion Science, 79 139-147 (2014) [C1]

When steel sheet piling suffers accelerated low water corrosion the webs and flange-web regions of individual piles often perforate first, for reasons not fully understood. To inv... [more]

When steel sheet piling suffers accelerated low water corrosion the webs and flange-web regions of individual piles often perforate first, for reasons not fully understood. To investigate this, samples of the cross-sections of typical U and Z profile sheet piling were exposed to natural seawater for 1, 2 and 3. years. They showed localized corrosion in the central region and also near the flange-web junctions. These locations were found to have more material defects and segregation and show composition differences. It is proposed these observations are linked to localized sheet pile perforation after long exposure to seawater. © 2013 Elsevier Ltd.

DOI 10.1016/j.corsci.2013.10.038
Citations Scopus - 1Web of Science - 1
Co-authors Rob Melchers
2014 Melchers RE, Jeffrey RJ, 'Corrosion of steel piling in seawater harbours', Proceedings of the Institution of Civil Engineers: Maritime Engineering, 167 159-172 (2014) [C1]

Unexpectedly high levels of corrosion of sheet and other steel piling were observed in UK harbours during the 1980s, and a phenomenon termed ¿accelerated low water corrosion¿ (A... [more]

Unexpectedly high levels of corrosion of sheet and other steel piling were observed in UK harbours during the 1980s, and a phenomenon termed ¿accelerated low water corrosion¿ (ALWC) caused considerable concern about the structural safety of harbour quays and facilities. This paper shows that the severity of corrosion of steel piling both in the tidal zone and in the immersion zone is correlated with the concentration of dissolved inorganic nitrogen (DIN) in the local seawater. In the lower tidal zone this is consistent with the thinning of piles associated with ALWC. Previously it has been shown that in the horizontal direction the ALWC phenomenon is associated with material variability. Models are developed to allow the prediction of expected average corrosion loss both in the immersion zone and for the lower tidal zone (the ALWC effect) as a function of DIN, water temperature and exposure period. Data are presented to show the relatively low beneficial effect of changes in steel composition. It is concluded that for long-term protection against corrosion reliance must be placed on protective and preventive measures.

DOI 10.1680/maen.13.00011
Citations Scopus - 1Web of Science - 1
Co-authors Rob Melchers
2013 Melchers RE, Jeffrey RJ, 'Accelerated low water corrosion of steel piling in harbours', CORROSION ENGINEERING SCIENCE AND TECHNOLOGY, 48 496-505 (2013) [C1]
DOI 10.1179/1743278213Y.0000000103
Citations Scopus - 2Web of Science - 2
Co-authors Rob Melchers
2012 Melchers RE, Jeffrey RJ, 'Corrosion of long vertical steel strips in the marine tidal zone and implications for ALWC', Corrosion Science, 65 26-36 (2012) [C1]
Citations Scopus - 20Web of Science - 12
Co-authors Rob Melchers
2010 Melchers RE, Ahammed M, Jeffrey RJ, Simundic G, 'Statistical characterization of surfaces of corroded steel plates', Marine Structures, 23 274-287 (2010) [C1]
DOI 10.1016/j.marstruc.2010.07.002
Citations Scopus - 17Web of Science - 10
Co-authors Goran Simundic, Mukshed Ahammed, Rob Melchers
2009 Jeffrey RJ, Melchers RE, 'Effect of vertical length on corrosion of steel in the tidal zone', Corrosion, 65 695-702 (2009) [C1]
DOI 10.5006/1.3319096
Citations Scopus - 11Web of Science - 7
Co-authors Rob Melchers
2009 Jeffrey RJ, Melchers RE, 'Corrosion of vertical mild steel strips in seawater', Corrosion Science, 51 2291-2297 (2009) [C1]
DOI 10.1016/j.corsci.2009.06.020
Citations Scopus - 22Web of Science - 11
Co-authors Rob Melchers
2008 Melchers RE, Jeffrey RJ, 'Modeling of long-term corrosion loss and pitting for chromium-bearing and stainless steels in seawater', Corrosion, 64 143-154 (2008) [C1]
DOI 10.5006/1.3280683
Citations Scopus - 4Web of Science - 3
Co-authors Rob Melchers
2008 Melchers RE, Jeffrey RJ, 'The critical involvement of anaerobic bacterial activity in modelling the corrosion behaviour of mild steel in marine environments', Electrochimica Acta, 54 80-85 (2008) [C1]
DOI 10.1016/j.electacta.2008.02.107
Citations Scopus - 55Web of Science - 25
Co-authors Rob Melchers
2008 Melchers RE, Jeffrey RJ, 'Probablistic models for steel corrosion loss and pitting of marine infrastructure', Reliability Engineering & System Safety, 93 423-432 (2008) [C1]
DOI 10.1016/j.ress.2006.12.006
Citations Scopus - 30Web of Science - 14
Co-authors Rob Melchers
2007 Jeffrey RJ, Melchers RE, 'Influence of migration of iron particles, ions and compounds during long term marine immersion corrosion', Corrosion Engineering Science and Technology, 42 145-151 (2007) [C1]
DOI 10.1179/174327807X196870
Co-authors Rob Melchers
2007 Jeffrey RJ, Melchers RE, 'Effect of orientation and shielding in the early corrosion of mild steel in tidal marine conditions', Corrosion, 63 872-879 (2007) [C1]
DOI 10.5006/1.3278438
Citations Scopus - 6Web of Science - 3
Co-authors Rob Melchers
2007 Jeffrey RJ, Melchers RE, 'The changing topography of corroding mild steel surfaces in seawater', Corrosion Science, 49 2270-2288 (2007) [C1]
DOI 10.1016/j.corsci.2006.11.003
Citations Scopus - 46Web of Science - 30
Co-authors Rob Melchers
2005 Melchers RE, Jeffrey RJ, 'Early corrosion of mild steel in seawater', Corrosion Science, 47 1678-1693 (2005) [C1]
DOI 10.1016/j.corsci.2004.08.006
Citations Scopus - 71Web of Science - 43
Co-authors Rob Melchers
2004 Melchers RE, Jeffrey RJ, 'Influence Of Water Velocity On Marine Immersion Corrosion Of Mild Steel', Corrosion, Vol. 60 84-94 (2004) [C1]
DOI 10.5006/1.3299235
Citations Scopus - 44Web of Science - 30
Co-authors Rob Melchers
2004 Melchers RE, Jeffrey RJ, 'Surface 'Roughness' Effect On Marine Immersion Corrosion Of Mild Steel', Corrosion, Vol. 60 697-703 (2004) [C1]
DOI 10.5006/1.3287847
Citations Scopus - 22Web of Science - 10
Co-authors Rob Melchers
2003 Jeffrey RJ, Melchers RE, 'Bacteriological Influence In The Development Of Iron Sulphide Species In Marine Immersion Environments', Corrosion Science, Vol. 45 693-714 (2003) [C1]
DOI 10.1016/S0010-938X(02)00147-6
Citations Scopus - 50Web of Science - 34
Co-authors Rob Melchers
2002 Jeffrey RJ, Melchers RE, 'Shape And Size Effects For Marine Immersion Coupons', British Corrosion Journal, Vol. 37, No. 2 99-104 (2002) [C1]
Citations Scopus - 20Web of Science - 14
Co-authors Rob Melchers
Show 17 more journal articles

Conference (58 outputs)

Year Citation Altmetrics Link
2014 Jeffrey R, Melchers RE, 'Five year observations of corrosion losses for steels at a severe marine atmospheric site', Annual Conference of the Australasian Corrosion Association 2014: Corrosion and Prevention 2014 (2014) [E1]

Comprehensive new data for the effects of orientation, height and bold exposure versus shielding effects and detailed chronological observations and variability data for nominally... [more]

Comprehensive new data for the effects of orientation, height and bold exposure versus shielding effects and detailed chronological observations and variability data for nominally identical exposures of mild steel coupons all exposed at one site is presented. Previous investigations have been reported only for different sites and this raises difficulties in making comparisons and deductions. The present results have been obtained under the one local climatic regime for all coupons, thus providing a much more controlled environment within which to compare various effects. The present paper deals with the five-year results and compares these with information available in the literature. After three years most of the boldly exposed double-sided coupons had completely corroded but many single-sided coupons remained viable. The difference in corrosion behaviour between individual coupons exposed at different heights and vertical continuous single strips of steel is described. Moreover, the difference in corrosion losses for a continuous strip and for a series of coupons oriented in different directions is described. Furthermore, variability of nominally identically exposed coupons is reported.

Co-authors Rob Melchers
2014 Jeffrey R, Melchers RE, 'A comparison of corrosion profiles of steel strips, coupons and chains', Annual Conference of the Australasian Corrosion Association 2014: Corrosion and Prevention 2014 (2014) [E1]

Corrosion profiles for coupons and for single strips have been published previously and tend to show a distinct difference between the two. Corrosion of a continuous strip usually... [more]

Corrosion profiles for coupons and for single strips have been published previously and tend to show a distinct difference between the two. Corrosion of a continuous strip usually results in a flatter profile than that obtained for a set of individual coupons. Herein these results are compared with the corrosion of chain links in chains exposed through the tidal zone. Steel chains are used extensively in the marine industry and are subject to the same corrosive effects as other marine steel infrastructure. The matter of interest is whether chain links act as individual coupons or form part of a single strip as in electrically connected links of a chain. If the corrosion profile is similar to that of coupons, individual links will act as isolated cathode/anode couples and will corrode faster in the tidal zone than if the corrosion loss is spread over the entire length of the chain. The present paper presents corrosion profiles derived from lengths of nominally 10 mm diameter steel chains exposed at three geographical locations and compares these profiles to profiles obtained from single strips and sets of individual coupons exposed at the same or similar locations.

Co-authors Rob Melchers
2014 Chaves IA, Jeffrey R, Melchers RE, 'The effect of cleaning procedures on corrosion coupon surface topography', Australasian Corrosion Association, Darwin - Australia (2014) [E1]
Co-authors Rob Melchers, Igor Chaves
2013 Melchers RE, Jeffrey R, 'Atmospheric Corrosion Of Mild Steel Vertical Prisms Of Different Plan Shape', Corrosion and Prevention 2013, Brisbane (2013) [E1]
Co-authors Rob Melchers
2013 Jeffrey R, Melchers RE, 'The effect of aluminium allying on the corrosion resistance of cast steel', Corrosion and Prevention 2013 Proceedings, Brisbane (2013) [E1]
Co-authors Rob Melchers
2013 Jeffrey R, Melchers RE, 'Atmospheric corrosion of mild steel vertical prisms of different plan shape', Annual Conference of the Australasian Corrosion Association 2013: Corrosion and Prevention 2013 (2013)

Atmospheric corrosion tests of mild steel have employed thin flat steel panels of various sizes, with low edge to main surface ratios. The corrosion loss results relate well to th... [more]

Atmospheric corrosion tests of mild steel have employed thin flat steel panels of various sizes, with low edge to main surface ratios. The corrosion loss results relate well to the corrosion of flat steel products and surfaces. The few results reported for circular coupons such as wires showed corrosion losses higher than for flat plates (Jeffrey et al). Herein new observations are reported for the development of rusts, delamination of rusts and of atmospheric corrosion losses for mild steel square, hexagonal and circular prisms exposed in the vertical orientation at Belmont Beach for up to 3 years. The corrosion loss results are compared to previously reported results for flat plate coupons at the same site. In general, smaller samples, including the flat coupons, corroded much more than larger samples. For the smaller prisms rusts delaminated within 12 months or less whereas delamination was not observed for the larger samples. It is proposed that this the result of radial or equivalent cracking permitting higher rates of oxygen diffusion to the corrosion interface.

Co-authors Rob Melchers
2013 Jeffrey R, Melchers RE, 'The effect of aluminium alloying on the corrosion resistance of cast steel', Annual Conference of the Australasian Corrosion Association 2013: Corrosion and Prevention 2013 (2013)

There is some evidence that the addition of small amount of aluminium can reduce the atmospheric corrosion of steel. However, systematic long-term investigations are lacking. Ther... [more]

There is some evidence that the addition of small amount of aluminium can reduce the atmospheric corrosion of steel. However, systematic long-term investigations are lacking. There also appears to be no information about resistance of such alloys to marine immersion conditions. This paper reports on the marine environment corrosion performance of steel alloyed with aluminium additions of 0% (control), 2%, 4%, 6% and 8%. The cast steel was forged into billets and machined into coupons. Sets of coupons were exposed to three exposure conditions: (a) in temperate seawater for 1, 2 and 3 years, (b) submerged below the mud-line for 1, 2 and 3 years and (c) exposed at two extremely severe atmospheric marine locations for 12 months. The results show that the increase in Al content reduced corrosion loss in submerged conditions from 10.5% after one year to 2.8% after 3 years. In the coastal atmosphere, corrosion loss dropped from 5.5% after one year with no Al addition to 1.2% with 8% Al alloying. The corrosion resistance in marine mud buried conditions was less favourable. Corrosion loss reduced from 4.4% after one year to 2.9% after 2 years but in some instance the addition of Al had minimal or no effect on corrosion resistance. These observations add to the body of knowledge regarding the effect of aluminium on long-term corrosion loss.

Co-authors Rob Melchers
2012 Jeffrey RJ, Melchers RE, 'The effect of microbiological involvement on the topography of corroding mild steel in coastal seawater', Book of Abstracts. Eurocorr 2012, Istanbul, Turkey (2012) [E2]
Co-authors Rob Melchers
2012 Jeffrey RJ, 'The changing composition of the corrosion products of mild steel in severe marine atmospheres', Eurocorr 2012. The European Corrosion Congress, Istanbul, Turkey (2012) [E2]
2012 Melchers RE, Jeffrey RJ, Fontaine E, 'Corrosion and the structural safety of FPSO mooring systems in Tropical waters', Proceedings of the Australasian Structural Engineering Conference 2012, Perth, WA (2012) [E1]
Co-authors Rob Melchers
2012 Jeffrey RJ, Melchers RE, 'The changing composition of the corrosion products of mild steel in severe marine atmospheres', Annual Conference of the Australasian Corrosion Association 2012, melbourne, australia (2012) [E1]
Co-authors Rob Melchers
2012 Jeffrey RJ, Melchers RE, 'The effect of increasing amounts of nutrient on the corrosion rate of mild steel', Corrosion & Prevention 2012, Melbourne, Australia (2012) [E1]
Co-authors Rob Melchers
2012 Jeffrey RJ, Melchers RE, 'The effect coupon size for the determination of atmospheric corrosivity', Corrosion & Prevention 2012, Melbourne, Australia (2012) [E1]
Co-authors Rob Melchers
2012 Stockert L, Haas M, Jeffrey RJ, Melchers RE, 'Electrochemical measurements and short-term-in-situ exposure testing', Corrosion & Prevention 2012, Melbourne, Australia (2012) [E1]
Co-authors Rob Melchers
2011 Jeffrey RJ, Melchers RE, 'The effect of airborne nutrients on atmospheric corrosion', 18th International Corrosion Congress 2011, Perth, WA (2011) [E1]
Co-authors Rob Melchers
2011 Melchers RE, Jeffrey RJ, 'Deterioration mechanics - The competition between abiotic and biotic processes', Incorporating Sustainable Practice in Mechanics of Structures and Materials: Proceedings of the 21st Australian Conference on the Mechanics of Structures and Materials, Melbourne, VIC (2011) [E1]
Co-authors Rob Melchers
2011 Melchers RE, Ahammed M, Jeffrey RJ, Simundic G, 'Statistical analysis of the surfaces of corroded mild steel plates', Proceedings of the 11th International Conference on Applications of Statistics and Probability in Civil Engineering, Zurich, CH (2011) [E1]
Co-authors Rob Melchers, Goran Simundic, Mukshed Ahammed
2011 Jeffrey RJ, 'The anaerobic domain of marine immersion corrosion', Symposium on Microbiologically Influenced Corrosion Papers, Melbourne, VIC (2011) [E1]
2010 Melchers RE, Jeffrey RJ, 'Experimental investigation of accelerated low water corrosion of steel piling in habours', Proceedings of the 2nd International Conference on the Structures Degradation in Coastal Zones, La Rochelle, France (2010) [E1]
Co-authors Rob Melchers
2010 Jeffrey RJ, Melchers RE, 'Variability of corrosion of mild steel coupons in tidal, splash and atmospheric marine environments', Corrosion and Prevention 2010: Always Protecting, Always Learning, Adelaide, SA (2010) [E1]
Co-authors Rob Melchers
2010 Melchers RE, Jeffrey RJ, Simundic G, 'Representativeness of small coupons for corrosion of large plates', Proceedings of the ACA Conference: Corrosion and Prevention 2010, Adelaide, SA (2010) [E1]
Co-authors Rob Melchers, Goran Simundic
2010 Melchers RE, Jeffrey RJ, 'On predicting long-term corrosion behaviour from short-term tests', Proceedings of the ACA Conference: Corrosion and Prevention 2010, Adelaide, SA (2010) [E1]
Co-authors Rob Melchers
2010 Jeffrey RJ, Melchers RE, 'The effect of microbiological involvement on the topography of corroding mild steel in coastal seawater', NACE Corrosion Conference & Expo 2010, San Antonio, TX (2010) [E1]
Co-authors Rob Melchers
2010 Melchers RE, Jeffrey RJ, 'Corrosion of vertical steel strips exposed in the marine tidal zone and implications for ALWC', NACE Corrosion Conference & Expo 2010, San Antonio, TX (2010) [E1]
Co-authors Rob Melchers
2009 Jeffrey RJ, Melchers RE, 'Corrosion of isolated and electrically-connected steel coupons in temperate coastal seawater', Corrosion & Prevention 2009: The Management of Infrastructure Deterioration: Conference Proceedings, Coffs Harbour, NSW (2009) [E1]
Co-authors Rob Melchers
2009 Jeffrey RJ, Melchers RE, 'The effect of seawater sterilisation on the corrosion of mild steel', Corrosion & Prevention 2009: The Management of Infrastructure Deterioration: Conference Proceedings, Coffs Harbour, NSW (2009) [E1]
Co-authors Rob Melchers
2008 Melchers RE, Jeffrey RJ, 'Evidence for microbiological influenced longer-term corrosion in tidal and coastal atmospheric corrosion of steel elements', Corrosion & Prevention 2008: The Impact of Corrosion on our Lives: Conference Proceedings, Wellington, NZ (2008) [E1]
Co-authors Rob Melchers
2008 Jeffrey RJ, Melchers RE, 'Corrosion profiles of mild steel in varying tidal seawaters', Corrosion & Prevention 2008: The Impact of Corrosion on our Lives: Conference Proceedings, Wellington, NZ (2008) [E1]
Co-authors Rob Melchers
2008 Jeffrey RJ, Melchers RE, 'Three year observations of corrosion losses for steels at a severe marine atmospheric site', Corrosion & Prevention 2008: The Impact of Corrosion on our Lives: Conference Proceedings, Wellington, NZ (2008) [E1]
Co-authors Rob Melchers
2008 Melchers RE, Jeffrey RJ, 'Early test results and interpretations for corrosion of vertical steel strips exposed in the marine tidal zone', The 14th International Congress on Marine Corrosion and Fouling: Abstracts, Kobe, Japan (2008) [E3]
Co-authors Rob Melchers
2008 Jeffrey R, Melchers R, 'Three year observations of corrosion losses for steels at a severe marine atmospheric site', 48th Annual Conference of the Australasian Corrosion Association 2008: Corrosion and Prevention 2008 (2008)

A large scale atmospheric corrosion trial extending over five years is currently being conducted at Belmont Beach near Newcastle, Australia. The intent is to obtain information ab... [more]

A large scale atmospheric corrosion trial extending over five years is currently being conducted at Belmont Beach near Newcastle, Australia. The intent is to obtain information about the effects of orientation, height and bold exposure versus shielding effects as well as detailed chronological observations and variability data for nominally identical exposures. Such comprehensive data has not previously been obtained for the one site and under the one local climatic regime for all coupons. This provides a much better and more controlled environment in which to compare the various effects. Failure to achieve this in previous studies renders the study of such influences problematic. Also, variability of nominally identically exposed coupons has not previously been given attention. The paper deals with the three-year results and compares these with information available in the literature. After three years most of the boldly exposed coupons have completely corroded but most of the single sided coupons remain in varying degrees. A comparison is given between individual coupons exposed at different heights and single strips of steel exposed over the same vertical distance.

2007 Jeffrey RJ, Melchers RE, 'Correlation between water temperature and corrosion of mild steel in different waters', Corrosion Control 007. Conference Proceedings, Sydney (2007) [E1]
Co-authors Rob Melchers
2007 Jeffrey RJ, 'Corrosion of mild steel in tropical waters', Corrosion Control 007. Conference Proceedings, Sydney (2007) [E1]
2007 Jeffrey RJ, 'Analysis of tubercles and rust layers formed on mild steel exposed in seawater', 1st Corrosion and Material Protection Conference 2007. Proceedings, Prague, Czech Republic (2007) [E2]
2007 Jeffrey RJ, Melchers RE, 'New data for verification of a phenomenological model for corrosion of steels in seawater', 1st Corrosion and Material Protection Conference 2007. Proceedings, Prague, Czech Republic (2007) [E2]
Co-authors Rob Melchers
2007 Melchers RE, Jeffrey RJ, 'The critical involvement of anaerobic bacterial activity in modelling the corrosion behaviours of mild steel in marine environments', BIOCORYS 2007, Paris (2007) [E2]
Co-authors Rob Melchers
2007 Farinha PA, Jeffrey RJ, 'MIC in ports and harbours - An overview of ALWC phenomena in Australia', MIC Symposium: An International Perspective. Proceedings, Perth (2007) [E2]
2007 Melchers RE, Jeffrey RJ, 'The involvement of anaerobic bacteria in the corrosion of mild steel in water', MIC Symposium: An International Perspective. Proceedings, Perth (2007) [E2]
Co-authors Rob Melchers
2007 Jeffrey RJ, Melchers RE, 'Corrosion profiles of mild steel in varying tidal seawaters', Second World Congress on Corrosion in the Military. Proceedings, Naples, Italy (2007) [E2]
Co-authors Rob Melchers
2007 Jeffrey RJ, 'MIC in galvanized potable water piping', Second World Congress on Corrosion in the Military. Proceedings, Naples, Italy (2007) [E2]
2007 Jeffrey R, 'Corrosion of mild steel in tropical waters', 47th Annual Conference of the Australasian Corrosion Association 2007: Corrosion Control 2007 (2007)

A three year immersion trial has been completed at a tropical immersion test site about 40 km south of Townsville, Queensland. Mild steel coupons were exposed in five tidal planes... [more]

A three year immersion trial has been completed at a tropical immersion test site about 40 km south of Townsville, Queensland. Mild steel coupons were exposed in five tidal planes and recovered at six monthly intervals. Six metre strips were also exposed and recovered over two years, cut into segments and tidal profiles derived. The first year corrosion loss varied from about 50 microns for submerged conditions to greater than 500 microns for the high tide level. Comparisons are made between the loss on coupons and the loss from strip segments, as well as data from the literature. At the tropical site the profiles from individual coupons and equivalent strip segments show a similar trend in the corrosion profiles as opposed to the generally held belief that there is significant difference between the two methods. It was also shown that after six months corrosion of the continuous strip was higher than that on the coupons but after two years the reverse was the case. Tidal corrosion profiles derived from strips confirm preferential high tide corrosion loss but also show the development of a low water accelerated corrosion regime that is attributed to tubercles. X-Ray Diffraction analysis was undertaken on the tubercles, compared to that in the literature for fresh water tubercles and found to be similar.

2006 Jeffrey RJ, Melchers RE, 'Early observations of corrosion losses for steels at a severe marine atmospheric site', Corrosion and Prevention 2006, Hobart, Tasmania (2006) [E1]
Co-authors Rob Melchers
2006 Jeffrey RJ, Melchers RE, 'Observations of corrosion losses for steels exposed in tidal seawaters', Corrosion and Prevention 2006, Hobart, Tasmania (2006) [E1]
Co-authors Rob Melchers
2005 Jeffrey RJ, Melchers RE, 'Corrosion Field Trials - Case Studies On Unsuccessful Atmospheric And Marine Immersion Studies', Corrosion and Prevention 2005, Gold Coast, QLD (2005) [E1]
Co-authors Rob Melchers
2005 Dockrill BJ, Jeffrey RJ, 'Corrosion Rates In A Fertilizer Plant And The Structural Failure Of A Conveyor Gantry', Proceedings Australasian Corrosion Congress, Gold Coast, Australia (2005) [E1]
2005 Jeffrey RJ, Melchers RE, 'The Changing Surface Topography Of Corroding Mild Steel In Sub-Tropical Coastal Waters', 16th International Corrosion Congress, Beijing, China (2005) [E2]
Co-authors Rob Melchers
2005 Jeffrey RJ, Melchers RE, 'Morphology Of The Corrosion Products Of Mild Steel Immersed In Temperate Seawaters', 16th International Corrosion Congress, Beijing, China (2005) [E2]
Co-authors Rob Melchers
2004 Jeffrey RJ, Melchers RE, 'Migration Of Iron Particles, Ions and Compounds During Long-Term Marine Immersion Corrosion', Corrosion and Prevention 2004, Perth, Australia (2004) [E1]
Co-authors Rob Melchers
2004 Jeffrey RJ, Melchers RE, 'Influence Of Tidal Movement On Marine Immersion Corrosion Of Mild Steel - Preliminary Results', Corrosion and Prevention 2004, Perth, Australia (2004) [E1]
Co-authors Rob Melchers
2003 Jeffrey RJ, Melchers RE, 'An XRD Study Of The Products Of Corrosion Of Mild Steel Immersed In Coastal Conditions', Corrosion Control And NDT, Melbourne, Australia (2003) [E1]
Co-authors Rob Melchers
2003 Melchers RE, Jeffrey RJ, 'Observations On The Effect Of Surface 'Roughness' In The Marine Immersion Corrosion Of Mild Steel Coupons', Corrosion Control And NDT, Melbourne, Australia (2003) [E1]
Co-authors Rob Melchers
2002 Jeffrey RJ, Melchers RE, 'Effect Of Seawater Velocity On Immersion Corrosion Of Mild Steel', Corrosion And Prevention - 02, Adelaide, South Australia (2002) [E1]
Co-authors Rob Melchers
2002 Melchers RE, Jeffrey RJ, 'Variability In Corrosion Of Mild Steel Coupons In Seawater', Corrosion And Prevention 02, Adelaide, South Australia (2002) [E1]
Co-authors Rob Melchers
2002 Jeffrey RJ, Melchers RE, 'Influence Of Edge Effect On Marine Immersion Corrosion Measurement For Mild Steel Coupons', 15th International Corrosion Congress, Granada, Spain (2002) [E2]
Co-authors Rob Melchers
2002 Jeffrey RJ, Melchers RE, 'Images Of Bacteriological Influence In The Development Of Iron Sulphide In Marine Immersion Environments', 15th International Corrosion Congress, Granada, Spain (2002) [E2]
Co-authors Rob Melchers
2001 Jeffrey RJ, Melchers RE, 'Bacteriological influence in the development of iron sulphide species in marine immersion environments', Proceedings of Corrosion and Prevention - 2001, Newcastle (2001) [E1]
Co-authors Rob Melchers
2000 Jeffrey RJ, Melchers RE, 'Boundary Conditions of Marine Immersion Coupons', Corrosion & Prevention - 2000, Auckland, New Zealand (2000) [E1]
Co-authors Rob Melchers
1999 Jeffrey RJ, Melchers RE, 'Influence of environmental factors on the early corrosion of steel in coastal seawater', Proceedings Corrosion & Prevention-99, Sydney, Australia (1999) [E1]
Co-authors Rob Melchers
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Grants and Funding

Summary

Number of grants 3
Total funding $330,598

Click on a grant title below to expand the full details for that specific grant.


20082 grants / $99,960

Quantification of the influence of bacteria and elevated nutrient levels on the corrosion of structural steels in seawaters$90,000

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Doctor Robert Jeffrey
Scheme Discovery Projects
Role Lead
Funding Start 2008
Funding Finish 2008
GNo G0187425
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

Industrial Applications of Corrosion Sensing$9,960

Funding body: CRC for Integrated Engineering Asset Management (CIEAM)

Funding body CRC for Integrated Engineering Asset Management (CIEAM)
Project Team Professor Robert Melchers, Doctor Robert Jeffrey
Scheme Research Grant
Role Investigator
Funding Start 2008
Funding Finish 2008
GNo G0189330
Type Of Funding CRC - Cooperative Research Centre
Category 4CRC
UON Y

20051 grants / $230,638

The role of sulphate reducing bacteria in the pitting corrosion of mild steel as used for engineering infrastructure applications$230,638

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Doctor Robert Jeffrey
Scheme Discovery Projects
Role Lead
Funding Start 2005
Funding Finish 2005
GNo G0184335
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y
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Dr Robert Jeffrey

Position

Research Associate
Centre for Infrastructure Performance and Reliability
School of Engineering
Faculty of Engineering and Built Environment

Focus area

Chemical Engineering

Contact Details

Email robert.jeffrey@newcastle.edu.au
Phone (02) 4921 5741
Fax (02) 4921 6991

Office

Room EA207
Building Engineering A
Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
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