OALib Journal期刊
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3cr低合金钢在含饱和co2的nacl溶液中的腐蚀电化学行为
Keywords: 材料失效与保护,3cr低合金钢,ph,电化学阻抗谱,?腐蚀
Abstract:
?研究了含饱和co2的nacl溶液ph值对3cr低合金钢腐蚀及其电化学行为的影响。结果表明:当nacl溶液的ph值较低(2,3.9)时,腐蚀产物膜为单层结构,呈龟裂状;当ph值较高(6.5)时,腐蚀产物具有三层结构,外层腐蚀产物为颗粒状,内层仍呈龟裂状。nacl溶液的ph值对3cr低合金钢的腐蚀电化学行为也有显著影响。nacl溶液的ph值升高能改变电极过程中的主要阴极反应,使腐蚀电位逐渐负移,且电荷转移电阻的增大使腐蚀电流密度减小。
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