Ultrafine-grained copper produced by machining and its unusual electrochemical corrosion resistance in acidic chloride pickling solutions

被引：25

作者：

Deng, Wenjun ^{[1
]}

Lin, Ping ^{[1
]}

Li, Qing ^{[1
]}

Mo, Guangquan ^{[2
]}

机构：

[1] S China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510641, Peoples R China

[2] Guangzhou Med Univ, Dept Chem, Guangzhou 510182, Guangdong, Peoples R China

来源：

CORROSION SCIENCE | 2013年 / 74卷

基金：

中国国家自然科学基金;

关键词：

Copper; Polarization; EIS; Acid corrosion; SEVERE PLASTIC-DEFORMATION; CRACKING SUSCEPTIBILITY; BEHAVIOR; INHIBITION; ALLOYS; ECAP; METALS;

D O I：

10.1016/j.corsci.2013.04.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ultrafine-grained (UFG) copper was prepared by facile machining procedure. High resolution transmission electron microscopy images revealed that, in UFG Cu, minimum grain size of 80 nm could be formed when a small machining rake angle was applied. The electrochemical corrosion behavior of UFG Cu in 0.5 M HCl was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy. Comparing with coarse-grained Cu, UFG Cu exhibited notably declined corrosion current density. Particularly, when the size of Cu grains were reduced from 500 gm to 80 nm, the charge transfer resistance of anodic dissolution step dramatically increased from 200 to 621 Omega cm(2). (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：44 / 49

页数：6

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