The corrosion behavior of weathering steel in the environments with different NaCl concentrations was systematically investigated. The results indicated a decrease of corrosion resistance of steel as NaCl concentration increased. While, the weight gain rate in high concentration was lower than that in lower conditions, which was attributed to the inhibition on the diffusion of O₂ caused by the residual NaCl solution. Cu, Ni and Mo can mutually promote the agglomeration process and improve the performance of the rust layer in low NaCl concentrations, which was severely inhibited in high NaCl concentrations, resulting in a loose rust layer.

中文翻译：

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耐候钢在不同NaCl浓度环境下的腐蚀行为及Cu、Ni、Mo的作用

系统研究了耐候钢在不同NaCl浓度环境中的腐蚀行为。结果表明，随着 NaCl 浓度的增加，钢的耐腐蚀性能下降。而高浓度下的增重率低于较低条件下的增重率，这是由于残留的NaCl溶液抑制了O ₂的扩散。Cu、Ni、Mo可以相互促进团聚过程，在低NaCl浓度下提高锈层性能，而在高NaCl浓度下受到严重抑制，导致锈层松散。