Multilayer coatings for corrosion protection of coal gasifier components

被引：8

作者：

Perez-Mariano, J. ^{[1
]}

Lau, K. H. ^{[1
]}

Alvarez, E. ^{[1
]}

Malhotra, R. ^{[1
]}

Hornbostel, M. ^{[1
]}

Krishnan, G. ^{[1
]}

Sanjurjo, A. ^{[1
]}

机构：

[1] SRI Int, Mat Res Lab, Menlo Pk, CA 94025 USA

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2008年 / 112卷 / 01期

关键词：

fluidized bed; CVD; coating; corrosion; H2S; coal gasification;

D O I：

10.1016/j.matchemphys.2008.05.028

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Deposition of TiAlN/Nb, TiAlN/Ta, TiAlN/W and TiAlN/Zr multilayer coatings on 409 stainless steel was studied by CVD in a fluidized bed reactor (FBR-CVD). The coatings consisted of four TiAlN layers with individual thickness of 2.5-3.5 mu m, and four metal interlayers with thicknesses in the range of 100-250 nm. The W interlayers suffered partial nitridation during the coating process and the resulting coatings had poor adhesion. Deposition of Zr through reduction of ZrI4 by H-2 was found to be inefficient. Both TiAlN/Nb and TiAlN/Ta coatings showed good adhesion, but only TiAlN/Nb provided sulfidation resistance to 409 steel during exposure to simulated coal gas at 1173 K for 300 h. Though outward diffusion of Cr took place during the corrosion test, the results reported in this paper suggest that TiAlN/Nb coatings are promising candidates for corrosion protection of steels under typical coal gasifier conditions. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：180 / 185

页数：6

共 24 条

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