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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Corrosion behavior of B30 Cu-Ni alloy and anti-corrosion coating in
marine environment
LI Qing-fen(李庆芬)1 , LI Chun-hui(李春辉)1 , XU Li-kun (许立坤) 2,LIU Guang-zhou(刘光洲)2

1. College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China;
2. State Key Laboratory for Marine Corrosion and Protection, Qingdao 266071, China

Abstract:The corrosion behavior of B30 Cu-Ni alloy in a sterile seawater and a SRB solution was investigated. The results show that the corrosion potential of specimen in the SRB solution is much lower than that in the sterile seawater. The polarization resistance of specimen in the SRB solution decreases quickly after a period immersion and becomes much lower than that in the sterile seawater. It is concluded that the SRB accelerates the corrosion process of B30 Cu-Ni alloy greatly. An anti-corrosion electroless Ni-P coating was produced and applied to the alloy. The results show that specimens coated with Ni-P plating exhibit favorable corrosion resistance property in SRB solution. Severe pitting corrosion appears on the uncoated specimens in the SRB solution when the coated specimens are still in good condition. The anti-corrosion mechanism of Ni-P plating was analyzed. It is concluded that coating the B30 Cu-Ni alloy with electroless Ni-P plating is an effective technique against the attack of SRB in marine environment. 

 

Key words: Cu-Ni alloy; microbiological influenced corrosion(MIC); sulfate-reducing bacteria (SRB); anti-corrosion coating; corrosion behavior

ISSN 1672-7029
CN 43-1423/U

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