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首页> 外文会议>International Corrosion Congress >Effect of Sulfate and Chloride Ions on Corrosion Potential and Corrosion Rate Transient during Atmospheric Corrosion of Low Alloy Steels
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Effect of Sulfate and Chloride Ions on Corrosion Potential and Corrosion Rate Transient during Atmospheric Corrosion of Low Alloy Steels

机译：硫酸盐和氯离子对低合金钢大气腐蚀腐蚀电位和腐蚀速率的影响

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Atmospheric corrosion behaviour of mild steel, weathering steel and 3%Ni steel were observed under sodium sulfate and sodium chloride environment in order to investigate the role of low alloy elements. Corrosion potential and corrosion rate during wet/dry transition were measured simultaneously by Kelvin probe and differential pressure meter within a closed chamber. In sulfate ions containing environment, the total amount of consumed oxygen on atmospheric corrosion decreased with the repetition of wet/dry cycles except for 2nd cycle, since the young rust layer accelerated the dissolution of Fe due to its low stability against the reduction of rust during its wet stage. In case of sodium chloride environment, the total consumed oxygen for each wet/dry cycle increased, and the number of wet/dry cycle which gave the maximum oxygen consumption was larger than that of sodium sulfate environment, since chloride ions had high corrosivity and prevented the stabilization of rust layer. In contrast 3%Ni steel showed rapid decrease of oxygen consumption during repetition of wet/dry cycles, which demonstrated the high corrosion resistance in chloride containing environments.
机译：在硫酸钠和氯化钠环境下观察温和钢，风化钢和3％Ni钢的大气腐蚀行为，以研究低合金元素的作用。在闭合室内的静脉探针和差压计同时测量湿/干燥转变过程中的腐蚀电位和腐蚀速率。在含硫离子环境中，除了第2循环外，湿/干循环的湿/干循环的总氧气总量降低，因为幼锈层由于其低于减少铁锈的稳定性而加速了FE的溶解它的潮湿阶段。在氯化钠环境的情况下，每个湿/干循环的总消耗氧气增加，并且湿/干循环的数量大于硫酸钠环境的湿润/干循环的数量，因为氯离子具有高腐蚀性并预防防锈层的稳定性。相比之下，在重复湿/干循环期间，3％Ni钢显示出氧气消耗的快速降低，这表明含氯化物环境中的高耐腐蚀性。

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