碳钢和耐候钢在盐雾环境下的腐蚀行为研究

摘要

Objective To study the corrosion process of Q235 steel and weathering steel in 3.5% NaCl cyclic salt spray/dry accelerated corrosion experiment and to compare their corrosion resistance. Methods Weight-loss method, XRD,SEM and electrochemical test. Results The rust layer of Q235 steel and weathering steel had no significant protective effect,but the weather resistance of weathering steel was slightly better than that of Q235 steel. Conclusion In simulated Marine atmospheric environment,the weathering steel had no superiority. The weathering steel is not applicable to marine atmospheric environment.%目的：研究Q235钢和耐候钢在3.5%（质量分数）NaCl盐雾/干燥循环加速腐蚀试验中的腐蚀过程，比较它们的耐腐蚀性。方法采用腐蚀失重分析、X-射线衍射分析、扫描电镜观测和电化学测试等进行研究。结果 Q235钢和耐候钢的锈层没有明显的保护作用，但耐候钢的耐蚀性略优于Q235钢。结论在模拟海洋大气环境中，该耐候钢没有优越性，说明该耐候钢不适用于海洋大气环境中。