通过SEM、电化学方法以及XRD半定量分析方法,对在城市大气(武汉站)和工业大气(石化站)中曝晒早期的Q235碳钢和耐候钢锈层初期演化机制进行研究.与Q235碳钢相比,耐候钢在条件恶劣石化环境中更快体现耐候性,而在武汉站暴晒初期耐候钢腐蚀速率较Q235碳钢快.在含S高的石化环境,对于α-FeOOH形成有一定催化作用.另外发现锈层初期的氧化还原反应分为两个阶段.第一个阶段锈层还原产物的氧化较快,而第二个阶段,还原产物Fe3O4积累,氧化过程受阻,并且锈层整体电化学活性有所升高.
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