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通过监测处理前后海水环境参数的变化,利用开路电位-时间曲线、电化学阻抗谱及极化曲线等电化学方法,研究了316L不锈钢在电解处理前后的压载水中的腐蚀行为.结果表明,在处理海水中,316L不锈钢的耐点蚀性能优于天然海水,腐蚀倾向减小.处理海水中316L不锈钢的开路电位正移约0.4 V,电化学反应电阻明显增大,钝化膜的击穿电位正移0.37 V以上,316L不锈钢的耐蚀性增强.这可能与电解处理后海水中含有ClO~-,Cl_2和HClO等强氧化性物质,导致316L不锈钢的钝化膜增厚、变得更加致密有关.
The corrosion behavior of 316L stainless steel in ballast water before and after electrolysis was studied by measuring the changes of seawater environmental parameters before and after the treatment by using electrochemical methods such as open circuit potential-time curve, electrochemical impedance spectroscopy and polarization curves. The results showed that The corrosion resistance of 316L stainless steel is superior to that of natural seawater in treating seawater and the corrosion tendency is reduced.The open circuit potential of 316L stainless steel in seawater is shifted about 0.4 V, the electrochemical reaction resistance increases obviously, the breakdown voltage Positive shift of more than 0.37 V, 316L stainless steel corrosion resistance increased.This may be electrolyzed seawater containing ClO ~ -, ClO2 and HClO and other oxidizing substances, leading to 316L stainless steel passivation film thickening, become more compact related.