海洋污损生物对碳钢腐蚀的影响

Effect of Marine Fouling Creatures on Corrosion of Carbon Steel

报道了国产碳钢 (A3,3C)在我国黄海、东海、南海三个海上实验站八年实海试验的结果。从污损生物附着和碳钢腐蚀的结果看出 ,污损生物可降低碳钢平均腐蚀率 ,但促进局部腐蚀 ;在污损生物活跃的东海、南海近岸海域 ,一年后碳钢表面 1 0 0 %附着 。

Eight year field exposure corrosion test results of A3 steel and 3C steel are reported here. Both the immersed and tidal zone, carbon steel corrosion behavior and creature fouling are compared at Qingdao, Xiamen and Yulin exposure sites. Fouling creature can retard general corrosion but accelerate localized corrosion. It covers 100% of steel surface area only for one year in Xiamen and Yulin, and can keep the corrosion rate stable at a certain value for long time.The corrosion process affected by fouling creatures is discussed. Corrosion mechanism might change from oxygen controlled to non oxygen controlled process.