Diffusion Behavior of Cu in Carbon Steel and Its Influence on Corrosion Resistance of Carbon Steel

被引：0
|
作者：
Ma T. [1 ]
Li H. [1 ]
Gao J. [1 ]
Li Y. [1 ]
机构：
[1] College of Metallurgy and Energy, North China University of Science and Technology, Tangshan
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2019年 / 33卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Copper; Cu-Fe gradient material; Diffusion active energy; Diffusion coefficient; Metallic materials; Polarization curve;
D O I：
10.11901/1005.3093.2018.338
中图分类号：
学科分类号：
摘要：
The copper coating was deposited on the surface of carbon steel by electroplating method, and then annealed at high temperature. The diffusion coefficient of Cu in carbon steel were calculated by the Den-Broeder method, while the influence of Cu-metalizing on the corrosion resistance of carbon steel was investigated. Results show that the inward diffusion of Cu is mainly along grain boundaries of the carbon steel, while the diffusion of Cu will inhibit the growth of grains of the steel during heat treatment. The diffusion coefficient of Cu in carbon steel limits between 1.11×10-16~3.03×10-11 cm2/s, which increases with the increasing annealing temperature and decreases with the increasing Cu-concentration of copper. The diffusion activation energy of copper Cu in the ferrite + austenite region of carbon steel is between 90~108 kJ / mol at low temperatures, and in the ferrite region of carbon steel at high temperatures is between 126~167 kJ/mol. Furthermore, a Cu-Fe gradient material on the carbon steel gennerated via Cu-inward diffusion has better corrosion resistance rather than the bare carbon steel in NaCl solution. © All right reserved.
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页码：225 / 231
页数：6
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