Failure Analysis of Zinc Alloy Sacrificial Anode Cathodic Protection System and Coating System for Seawater Ballast Tank of FPSO
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.
ballast tankzinc anodefailure analysispolarity reversalfloating production and storage device
万方数据
维普
