钝化金属深海环境电偶腐蚀性能研究

摘要

根据美国深海环境试验取得的数据和我国表层海水取得的数据，可知钛合金TA2与不锈钢SS316在海洋环境中无电偶腐蚀倾向，实际使用中SS316却出现了严重的电偶腐蚀。针对这一问题，在深海和模拟深海环境中对TA2和SS316的电偶腐蚀性能进行了研究，结果表明，静态下TA2和SS316无电偶腐蚀产生；当两种金属相互摩擦使SS316钝化膜破损时，产生电偶腐蚀，SS316为偶对中的阳极，会加速腐蚀。%According to the deep sea environment test data obtained from USA and the shallow seawater data from our country, TA2 and SS316 will not behave galvanic corrosion tendency in the deep sea. However, during the practical use, SS316 appears the severe galvanic corrosion. In practical and simulated deep sea environment, there is no galvanic corrosion between the static TA2 and SS316. However, if there is abrasion between the two metals to damage the passive film on SS316, the galvanic corrosion will occur. SS316 will work as the anode to accelerate the corrosion.