铬铝涂层及其抗高温腐蚀的行为

中国腐蚀与防护学报

1987, Vol. 7

Issue (2): 77-82

研究报告

本期目录 | 过刊浏览

铬铝涂层及其抗高温腐蚀的行为

褚虎儿;曹铁梁;石声泰

中国科学院上海冶金研究所;中国科学院上海冶金研究所;中国科学院上海冶金研究所

CO-DEPOSITION OF Cr AND A1 BY PACK CEMENTATION AND THE RESISTANCE OF SUCH COATINGS AGAINST OXIDATION AND HOT CORROSION

Chu Huer Cao Tieliang and Shi Shengtai (SHIH; S. T;)(Shanghai Institute of Metallurgy: Academia Sinica)

全文: PDF(1127 KB)

摘要: 本文作者采用粉末包装法制备Cr-Al二元涂层,对Cr-Al二元涂层的制备以及涂层的高温腐蚀性能进行了研究。实验结果表明,在纯Ni上制备Cr含量较高的Cr-Al共渗涂层是困难的,纯Ni上Cr-Al共渗时,Al会同时沉积到纯Ni试样和Cr粉表面上,由于Cr粉表而上铝涂层的形成,大大降低丁Cr的活度,从而抑制了Ni上渗Cr的过程;然而,在纯Ni上用二步法制备Cr-Al二元涂层是可行的,先渗Cr后渗Al能产生理想的Cr-Al二元涂层,涂层具有良好的抗高温氧化和抗热腐蚀性能;而先渗Al后渗Cr则产生有孔洞的Cr-Al二元涂层,涂层的抗高温腐蚀性能很差。

Abstract：Although aluminide coatings have good oxidation resistant properties, their hot corrosion resistance is not satisfactory. It is thought that Cr-Al coatings may improve the high temperature corrosion resistance over that of aluminide coatings. Is it possible to produce a Cr-Al coating by a single step pack process? How good is the corrosion resistance of the Cr-Al coatings? These problems are discussed in this article. The experimental results show that it is difficult to obtain Cr-Al coatings on pure Ni by a single step pack cemenation process because aluminium deposited on nickle specimen and chromium powder reduces activity of chromium greatly, thereby hampering the chrominizing process. It is possible to form Cr-Al coatings by two-step pack processes. However the order of coating steps is very essential: a useful Cr-Al coating which can resist oxidation and hot corrosion can be produced by means of aluminizing after chrominizing, but an uncompact Cr-Al coating which contains many holes and doos not well resist oxidation and hot corrosion well be formed by chominizing.

收稿日期: 1987-04-25

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引用本文:

褚虎儿;曹铁梁;石声泰. 铬铝涂层及其抗高温腐蚀的行为[J]. 中国腐蚀与防护学报, 1987, 7(2): 77-82.
. CO-DEPOSITION OF Cr AND A1 BY PACK CEMENTATION AND THE RESISTANCE OF SUCH COATINGS AGAINST OXIDATION AND HOT CORROSION. J Chin Soc Corr Pro, 1987, 7(2): 77-82.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1987/V7/I2/77

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