Hot corrosion behavior of Co modified NiAl coating on nickel base superalloys

被引：82
|
作者：
Qiao, Min [1 ]
Zhou, Chungen [1 ]
机构：
[1] Beijing Univ Aeronaut & Astronaut, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
来源：
CORROSION SCIENCE | 2012年 / 63卷
关键词：
Metal coatings; Superalloys; Hot corrosion; HIGH-TEMPERATURE CORROSION; OXIDATION BEHAVIOR; ALUMINIDE COATINGS; DIFFUSION COATINGS; AL; CR; ALLOY; NACL; CODEPOSITION; VAPOR;
D O I：
10.1016/j.corsci.2012.06.027
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and corrosion behavior was studied for a Co modified NiAl coating formed on the superalloy DZ125 by pack cementation process. The hot corrosion kinetics showed that the mass gain of the coated specimen was three orders of magnitude lower than that of the uncoated specimen at 1173 K up to 100 h. The corrosion product formed on the surface of the coating mainly consisted of a protective alpha-Al2O3 film. The presence of Co in the coating could promote the establishment of a protective Al2O3 scale on the coating and restrain the internal diffusion of sulphur in the coating. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：239 / 245
页数：7
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