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Open AccessArticle

Accelerated Degradation Test and Predictive Failure Analysis of B10 Copper-Nickel Alloy under Marine Environmental Conditions

1
School of Reliability and Systems Engineering, Beihang University, Beijing 100191, China
2
State Key Laboratory for Marine Corrosion and Protection, Luoyang 471000, China
*
Author to whom correspondence should be addressed.
Academic Editor: Robert Lancaster
Materials 2015, 8(9), 6029-6042; https://doi.org/10.3390/ma8095290
Received: 28 July 2015 / Revised: 1 September 2015 / Accepted: 6 September 2015 / Published: 10 September 2015
(This article belongs to the Special Issue Failure Analysis in Materials)
This paper studies the corrosion behavior of B10 copper-nickel alloy in marine environment. Accelerated degradation test under marine environmental conditions was designed and performed based on the accelerated testing principle and the corrosion degradation mechanism. With the prolongation of marine corrosion time, the thickness of Cu2O film increased gradually. Its corrosion product was Cu2(OH)3Cl, which increased in quantity over time. Cl was the major factor responsible for the marine corrosion of copper and copper alloy. Through the nonlinear fitting of corrosion rate and corrosion quantity (corrosion weight loss), degradation data of different corrosion cycles, the quantitative effects of two major factors, i.e., dissolved oxygen (DO) and corrosion medium temperature, on corrosion behavior of copper alloy were analyzed. The corrosion failure prediction models under different ambient conditions were built. One-day corrosion weight loss under oxygenated stirring conditions was equivalent to 1.31-day weight loss under stationary conditions, and the corrosion rate under oxygenated conditions was 1.31 times higher than that under stationary conditions. In addition, corrosion medium temperature had a significant effect on the corrosion of B10 copper sheet. View Full-Text
Keywords: copper alloy; failure analysis; corrosion; marine environmental; accelerated degradation test copper alloy; failure analysis; corrosion; marine environmental; accelerated degradation test
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Sun, B.; Ye, T.; Feng, Q.; Yao, J.; Wei, M. Accelerated Degradation Test and Predictive Failure Analysis of B10 Copper-Nickel Alloy under Marine Environmental Conditions. Materials 2015, 8, 6029-6042.

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