关键词: 内防腐, 外防腐, 电化学防腐蚀, 化学药剂防腐蚀

Abstract: The offshore oil field facilities and systems are various and complex,and the corrosion degree and characteristics are also different,but they can be generally divided into two categories: pipelines and containers. The differences in their own structure determine the inevitable differences in the anti-corrosion measures. However,the similarities in the corrosive environment and their own materials also make the basic protective measures of the two very similar. The anti-corrosion measures adopted are mainly divided into internal and external anti-corrosion measures,electrochemical anti-corrosion and chemical anti-corrosion measures. The corrosion environment faced by offshore oil field facilities is undoubtedly complex,but the corrosion problems can be generally divided into electrochemical corrosion,chemical corrosion and microbial corrosion. For each type of corrosion,there are specific anti-corrosion measures. The synergy between various measures enhances the effectiveness of anti-corrosion measures. Based on the corrosion principle,the prevention of corrosion can be carried out from three aspects: the first is the control of materials,the second is the control of environment,and the third is the control of interface.

Key words: internal corrosion protection, external corrosion protection, electrochemical corrosion protection, chemical corrosion prevention