Evaluation of the corrosion behaviour of plasma-sprayed Ni3Al coatings on steel in oxidation and molten salt environments at 900°C

被引：140

作者：

Sidhu, BS ^{[1
]}

Prakash, S ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Mat & Met Engn, Roorkee 247667, Uttar Pradesh, India

来源：

SURFACE & COATINGS TECHNOLOGY | 2003年 / 166卷 / 01期

关键词：

coatings; plasma spray; Ni3Al; oxidation; hot corrosion;

D O I：

10.1016/S0257-8972(02)00772-7

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ni3Al coatings were obtained on boiler tube steels through a plasma spray process. Ni-Cr-Al-Y was used as a bond coat before applying Ni3Al] coatings. Characterisation and hot corrosion behaviour of coatings after exposure to air and molten salt at 900 degreesC were studied under cyclic conditions. The Ni3Al coating was very effective in decreasing the corrosion rate in air and molten salt at 900 degreesC in the case of ASTM-SA210 grade A1 and ASTM-SA213-T-11 types of steel. whereas the coating was least effective for ASTM-SA213-T-22 steel. Uncoated ASTM-SA213-T-22 steel showed very poor resistance to hot corrosion in molten salt environment, with spalling of the oxide scale. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：89 / 100

页数：12

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