Cr元素对Cu-Fe原位复合材料的电化学腐蚀行为的影响  

Effects of Cr Element on Electrolytic Corrosion Behavior of Cu-Fe in Situ Composites

作　　者：高青[1] 刘宗茂[1] 刁美燕[1] 

机构地区：[1]河北科技大学材料科学与工程学院,河北石家庄050054

出　　处：《全面腐蚀控制》2005年第3期19-21,共3页Total Corrosion Control

基　　金：河北省自然科学基金资助项目(503372)

摘　　要：采用选择腐蚀技术,提取了Cu-Fe原位复合材料中的纤维相,并测定了纤维相电极电位,同时通过极化曲线测定,研究了Cu-18wt%Fe、Cu-15wt%Fe、Cu-16wt%Fe-2wt%Cr三种原位复合材料在HSO3-和/或Cl-介质中的电化学腐蚀行为。结果表明,在Cu-16wt%Fe-2wt%Cr原位复合材料中,由于Cr元素的加入,使Fe-Cr相纤维为阴极,基体铜为阳极,二者的自腐蚀电位起始电位差低于Cu-Fe原位复合材料,导致腐蚀电流显著降低。The fibres were extracted from Cu-Fe in situ composites by use of a selective etching technique, and the electrodepotential of the fibres was determinated.By means of polarization curve measurements,the electrolytic corrosion behavior of Cu-18wt%Fe、Cu-15wt%Fe、Cu-16wt%Fe-2wt%Cr in situ composites in HSO3-/Cl- media was studied. The results show that Fe-Crfibre is cathode,while basis metal Cu is anode because of the addition of Cr to the composites, its initial potentiometrics is lower thanCu-Fe in situ composites,so its corrosion current density obviously lowers.

关 键 词：电化学腐蚀行为 Cu-Fe原位复合材料 Cr 元素 自腐蚀电位 腐蚀技术 电极电位 极化曲线 Cl^- 腐蚀电流 纤维 电位差 测定 r相 基体 

分 类 号：TG171[金属学及工艺—金属表面处理] TB331[金属学及工艺—金属学]