This paper analyzes the failure of anticorrosive coating failure and zinc alloy sacrificial anode used in seawater ballast tank of offshore oil engineering FPSO at temperatures more than 50 ℃.Based on the measurement of anode contact resistance,analysis of the chemical composition of anode materials and the corrosion products(passivation layer),and the simulation of the actual working environment,the main reasons leading to the failure of the anticorrosive coating in this environment and the failure of the zinc anode cathodic protection system are confirmed.The risk analysis is provided for the corrosion control design and anode material selection in this environment to avoid similar failure risks.It can avoid shutdown and major safety accidents caused by this problem.
关键词
压载舱/锌阳极/失效原因分析/极性反转/浮式生产储油装置
Key words
ballast tank/zinc anode/failure analysis/polarity reversal/floating production and storage device
维普
万方数据