【摘要】 通过周期性浸润腐蚀试验对实验室冶炼的加稀土和未加稀土的Cu-P系耐候钢和A3钢进行了腐蚀性能的测定,结果表明:加稀土和未加稀土的Cu-P系耐候钢的耐蚀性均远远好于A3钢的耐蚀性,而加稀土的耐候钢比不加稀土的耐候钢的耐腐蚀性更好。通过极化试验、扫描电镜及能谱仪和X射线衍射仪等分析测试手段,对稀土耐候钢的耐蚀机理进行了研究,发现稀土通过使钢中的夹杂物变质使钢的耐蚀性提高,在腐蚀过程中稀土的存在有利于稳定的腐蚀产物-αFeOOH的形成,使耐蚀锈层更加均匀致密,因此提高了钢的耐蚀性。更多还原

【Abstract】 The weather resistance of 10PCuRE,10PCu and A3 steels were studied by dry-wet immersion test.Corrosion rates of 10PCuRE and 10PCu are much lower than that of A3.The weather resistance of RE weathering steel is better than that of weathering steel without RE.The weather resistance mechanism of RE weathering steel was studied through polarization test,SEM and XRD.Inclusions and rust layers of testing steels were analyzed.The results showed that RE can modify the morphology of inclusions.The formation of the steady corrosion product—α-FeOOH is promoted by RE making rust more uniformity and compact.So the corrosion resistance of steel can be improved.更多还原