摘要
采用全浸失重实验、电化学实验对实验室炼制的Cu-Sb-Mo低合金钢,对比钢304不锈钢和Q235B钢的耐硫酸、盐酸腐蚀性能进行评估。并且使用电化学阻抗谱(EIS)、扫描电镜(SEM)和X射线衍射(XRD)研究了试制钢在硫酸、盐酸中的耐蚀机理。结果表明:合金元素Cu,Sb和Mo的添加,可以同时抑制金属的阳极溶解反应和阴极析氢反应,降低腐蚀电流密度,增大金属的电荷转移电阻。合金元素的添加在金属表面形成了对应的氧化物、硫化物,它们在腐蚀介质中的稳定性比钢基体更高,从而抑制钢基体的进一步腐蚀。
Hot rolled plate of a new low alloy steel Cu-Sb-Mo was prepared and then its corrosion performance was evaluated in solutions of sulfuric acid and hydrochloric acid respectively by means of weight loss tests and electrochemical measurements in comparison with two commercial steels 304 stainless steel and Q235 B steel. Then the corroded steel was examined by EIS, SEM and XRD. The results indicate that the formed scale consisted of oxides and sulfides of the alloying elements(Cu, Sb and Mo) can inhibit both the anodic dissolution and cathodic hydrogen evolution reaction of the steel, decrease the corrosion current density and raise the charge transfer resistance of the steel, thereby the steel may be protected from further corrosion.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2015年第2期135-140,共6页
Corrosion Science and Protection Technology
关键词
低合金钢
硫酸
盐酸
露点腐蚀
电化学
low alloy steel,sulfuric acid,hydrochloric acid,dew-point corrosion,electrochemical
