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质量分数和温度对不锈钢在工业磷酸中电化学行为的影响

Keywords: 不锈钢,工业磷酸,极化曲线,电化学阻抗谱

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Abstract:

采用极化曲线、电化学阻抗谱(electrochemicalimpedancespectroscopy,EIS)研究了304L和S32304不锈钢在不同质量分数和温度工业磷酸中的电化学行为.研究表明:随着工业磷酸质量分数的增大,304L和S32304两种不锈钢自腐蚀电位和自腐蚀电流逐渐增大,极化电阻增大,耐蚀性增强;随着工业磷酸溶液温度的升高,304L和S32304两种不锈钢自腐蚀电位和自腐蚀电流逐渐增大,极化电阻和溶液电阻逐渐减小;工业级磷酸溶液中,304L不锈钢的耐蚀性能较S32304不锈钢的差.

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