通过循环盐雾腐蚀实验模拟镀锌钢在酸雨大气环境中的腐蚀过程.采用腐蚀质量损失测试、扫描电镜(SEM)、能谱仪(EDS)和电化学技术分别对腐蚀48,84,132,180和228 h的镀锌钢试样进行测试分析,得到腐蚀动力学规律、腐蚀产物成分、锈层截面形貌以及表面锈层的电化学特性.研究了锈层对镀锌钢在酸雨条件下大气腐蚀的影响.动力学分析表明,腐蚀过程中镀锌钢的表面形成了具有较好保护性的锈层;电化学测试结果表明,锈层的保护性呈现随腐蚀时间的延长先增强后减弱的变化过程.
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