Oxidation of Ni-W coatings at 700 and 800 °C in air

被引：20
|
作者：
Lee, DB [1 ]
Ko, JH
Kwon, SC
机构：
[1] Sungkyunkwan Univ, Dept Adv Mat Engn, Suwon 440746, South Korea
[2] Korea Inst Machinery & Met, Surface Technol Dept, Chang Won 641010, South Korea
来源：
SURFACE & COATINGS TECHNOLOGY | 2005年 / 193卷 / 1-3期
基金：
欧洲研究理事会;
关键词：
nickel; tungsten; electrodeposition oxidation;
D O I：
10.1016/j.surfcoat.2004.08.151
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The oxidation of Ni-(12-18 at.%)W coatings electrodeposited on steel was studied at 700 and 800 degrees C in air. The coatings oxidized with similar rates, and displayed poorer oxidation resistance than bulk Ni, probably due mainly to the formation of NiWO(4). The oxidation resulted in the formation of an outer NiO layer by outward transport of Ni, and an inner (NiO+NiWO(4)) mixed oxide layer by the inward diffusion of oxygen. At the same time, the outward diffusion of Fe toward the coating surface occurred, eventually resulting in the fort-nation of Fe(2)O(3) and NiFe(2)O(4) in the outer NiO layer. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：292 / 296
页数：5
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