您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 5    No. 1    March 1995

[PDF Download]    [Flash Online]

    

IMPROVEMENT OF HOT CORROSION RESISTANCE OF Ti3Al INTERMETALLIC COMPOUND BYIMPROVEMENT OF HOT CORROSION RESISTANCE OF Ti_3Al INTERMETALLIC COMPOUND BY SPUTTERED NiCrAlY COATING SPUTTERED NiC
Zeng Chaoliu ;Zhang Jianqing ;Wu Weitao ;Zhu Shenglong

Corrosion Science Laboratory; Institute of Corrosion and Protection of Metals; Academia Sinica ; Shenyang 110015

Abstract:The effects of sputtered NiCrAlY coating on hot corrosion resistance of Ti3Al intermetallics in the presence of(Na, K)2SO4 salts film at 950℃ in air were studied. It was shown that Ti3Al suffered from severe corrosion , forming a poor adhesive scale with an outer TiO2-enriched and inner Al2O3 enriched layer. The electrochemical mechanism was responsible for the corrosion process. The sputtered NiCrAlY coating can greatly improve corrosion resistance of Ti3Al by the the formation of a good adhesive Al2O3 enriched scale. But a-three-layer diffusion zone formed between coating and substrate alloy.

 

Key words: intermetallic compounds; Ti3Al NiCrAlY coating; hot corrosion

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn