Corrosion behaviors of Cr(N,O)/CrN double-layered coatings by cathodic arc deposition

被引：20

作者：

Ho, WY ^{[1
]}

Hsu, CH ^{[1
]}

Huang, DH ^{[1
]}

Lin, YC ^{[1
]}

Chang, CL ^{[1
]}

Wang, DY ^{[1
]}

机构：

[1] Tatung Univ, Dept Mat Engn, Taipei, Taiwan

来源：

SURFACE & COATINGS TECHNOLOGY | 2005年 / 200卷 / 5-6期

关键词：

cathodic arc deposition; CrN; Cr(N; O); corrosion;

D O I：

10.1016/j.surfcoat.2005.07.094

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

In this study, the Cr(N,O)/CrN double-layered coatings on tool steel were deposited using cathodic are deposition process. CrN layer was first deposited on tool steel as an interlayer to ensure better adhesion. Then Cr(N,O) was deposited as a surface layer. The Cr(N,O) composition was varied by changing the O-2/N-2 flow ratios during the coating process. The phase structure, chemical composition, and morphology of coatings were observed by utilizing X-ray diffractometer, Auger electron spectrometer and AFM. The corrosion behavior of coatings was investigated using polarization and immersion tests. Polarization test of coatings was carried out in the solution of 3.5 wt.% NaCl. For immersion test, Cr(N,O)/CrN double-layered coatings were exposed under H2SO4 environment for 26 h. The results showed that the corrosion resistance of Cr(N,O)/CrN double-layered coatings with thinner thickness with thinner thickness was better than that of CrN single layer since pinholes of coatings was inhibited by double layer structure. (c) 2005 Elsevier B.V All rights reserved.

引用

页码：1303 / 1309

页数：7

共 19 条

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[2]

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