耐候指数对热轧耐候钢电化学行为的影响  

Effects of Weathering Index on Electrochemical Behavior of Hot Rolled Weathering Steel

作　　者：赵丽丹 胡学文[1] 何博[1] 王占业[1] 郭锐 石践 汪飞 ZHAO Lidan;HU Xuewen;HE Bo;WANG Zhanye;GUO Rui;SHI Jian;WANG Fei(Ma’anshan Iron and Steel Co.,Ltd.,Ma’anshan 243003,China)

机构地区：[1]马鞍山钢铁股份有限公司,马鞍山243003

出　　处：《腐蚀与防护》2021年第6期49-51,56,共4页Corrosion & Protection

摘　　要：通过动电位极化曲线和电化学阻抗谱,研究了耐候指数对热轧耐候钢电化学行为的影响。结果表明:在3.5%NaCl溶液中,六种耐候钢未因腐蚀产物的生成而形成多层膜结构,总体上耐候钢的耐蚀性与耐候指数(I)呈正相关性。耐候指数在0.57-11.34之间时,耐候钢的腐蚀电位随耐候指数的增大而增大,并且符合关系式:Ecorr=2.34·10-4I2+0.007 9 I-0.685。The effects of weathering index on the electrochemical behavior of hot-rolled weathering steels were investigated by dynamic potential polarization curves and AC impedance spectrum. The results show that the six weathering steels did not form a multilayer film structure due to the formation of corrosion products in the 3.5% NaCl solution. The corrosion resistance was positively correlated with the weathering index(I). When the weathering index was between 0.57-11.34, the corrosion potential of the weathering steels increased with the increase of the weathering index, and in line with the relationship: Ecorr=2.34·10-4I2+0.007 9 I-0.685.

关 键 词：热轧耐候钢 耐候指数 电化学 动电位极化曲线 电化学阻抗谱 

分 类 号：TG174.4[金属学及工艺—金属表面处理]