通过周期性浸润腐蚀试验,研究了组织结构对贝氏体高强钢的耐腐蚀性能的影响。贝氏体高强钢和其退火试样的失重数据表明,贝氏体组织的耐腐蚀性能略优于铁素体和珠光体组织。运用扫描电镜和X射线衍射仪等分析测试手段对耐蚀机制进行了研究,发现两种试样均存在较致密的内锈层和疏松外锈层。两种试样的锈层成分主要是稳定的α-FeOOH和少量的γ-FeOOH组成。贝氏体组织的高强钢的锈层晶体更细小,均匀的组织结构有利于增强钢的耐腐蚀性能。
The accelerated corrosion tests were carried out to investigate the effect of the microstructure on the corrosion resistance on bainitic steel.The corrosion resistance was better for bainitic steel than annealing sample based on weight loss.The mechanism of the rust products formed has been investigated by SEM and XRD.The rust layers were composed of the inner rust layer and the outer rust layer on two samples of steel.The rust layers were mainly composed of α-FeOOH and γ-FeOOH.The homogeneous microstructure was beneficial to enhance the corrosion resistance.
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