Materials Performance

SEP 2018

Materials Performance is the world's most widely circulated magazine dedicated to corrosion prevention and control. MP provides information about the latest corrosion control technologies and practical applications for every industry and environment.

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SEPTEMBER 2018 W W W.MATERIALSPERFORMANCE.COM W W W.MATERIALSPERFORMANCE.COM SEPTEMBER 2018 (continued from p. A31) Subscribe to the Maritime Newsletter www.nace.org/resources/newsletters last several months, a second-generation hybrid anode system has been introduced to the Australian market. This system also involves an array of Zn anodes that incorporate a built-in battery that facili- tates ICCP initially (for several weeks) prior to switching to galvanic CP mode. Trials for electrochemical realkalization and chloride extrac- tion technologies (repair techniques that apply an electric current to mitigate steel corrosion in carbonated concrete by restoring concrete alkalinity and removing chloride ions from contaminated concrete, respectively) were conducted in Australia in the early 1990s on some bridges, buildings, and a wharf. Full-scale elec- trochemical realkalization projects were undertaken on reinforced concrete substructure elements of bridges in Queensland, Victoria, and New South Wales in the early 2000s. Electrochemical chloride extraction has been limited to a jetty in New South Wales during the mid-1990s and a bridge in Queensland in 1997. (These electro- chemical techniques, addressed in NACE SP0107, "Electrochemi- cal Realkalization and Chloride Extraction for Reinforced Concrete," are related to the use of ICCP of steel in concrete as described in NACE SP0290.) n Warren Green is a director and a principal corrosion engineer at Vinsi Partners Consulting Engineers (Sydney, New South Wales, Australia). A Fellow and CPEng with Engineers Australia, he has over 30 years of experience in corrosion engineering and materials technology covering marine, infrastructure, industrial, civil, and building structures. Green is also an adjunct associate professor in the Institute for Frontier Materi- als at Deakin University; a visiting adjunct associate professor in the Western Australia School of Mines: Minerals, Energy and Chemical Engineering at Curtin University; and an industry lead with the Australian Centre for Infrastructure Durability. He has been a NACE member for more than 20 years. References 1 W.B. Holtsbaum, P. Crevolin, The History of NACE International, The Corrosion Society (Houston, TX: NACE International, 2013). 2 R.F. Stratfull, "Cathodic Protection of a Bridge Deck: Preliminary Investigation," MP 55, 18 (2016): pp. 26-28. 3 J.R. Van Daveer, "Techniques for Evaluating Reinforced Concrete Bridge Decks," ACI Journal 12 (1975): pp. 697-703. 4 B.L. Martin, J.E. Bennett, "An Activated Titanium Mesh Anode for the Cathodic Protection of Reinforcing Steel in Concrete," Proc. CORROSION 1987 (Houston, TX: NACE, 1987), pp. 255-264. 5 R.J. Kessler, R.G. Powers, I.R. Lasa, "Update on Sacrificial Anode Cathodic Protection on Steel Reinforced Concrete Structures in Sea Water," CORROSION 1995, paper no. 516 (Houston, TX: NACE, 1995). 6 C.L. Page, G. Sergi, "Developments in Cathodic Protection Applied to Reinforced Concrete," J. Matls. in Civil Engrng. 2 (2000): pp. 8-15. 7 G.K. Glass, A.C. Roberts, N. Davison, "Hybrid Corrosion Protection of Chloride-Contaminated Concrete," Proc. Instn. Civil Engnrs. Construction Matls. 161, 4 (2008): pp. 163-172. 8 NACE SP0107-2017, "Electrochemical Realkalization and Chloride Extraction for Reinforced Concrete" (Houston, TX: NACE, 2017). A32 A32

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