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. 8    No. 1    March 1998

[PDF Download]    [Flash Online]

    

CORROSION OF A Co-15Ce ALLOY UNDER 10-3Pa  SAT700℃
Fu Guangyan1,2  Niu Yan1  and Wu Weitao1

1.State Key Laboratoryfor Corrosion and Protection,Institute of Corrosion and Protection of Metals, Chinese Academy of Sciences, Shenyang110015, P. R. China;
2.Department of Chemical Engineering and Machinery, Shenyang Institute of Chemical Technology, Shenyang110021, P. R. China

Abstract:The corrosion behaviors of a Co-Ce alloy containing approximately 15%Ce, pure Co and pure Ce have been studied at 700℃in H2-H2S mixtures providing a sulfur pressure of 10-3Pa. It is shown that the alloy corroded more slowly than pure cobalt, but more rapidly than pure cerium. The corrosion of the alloy produced duplex scales, containing an outermost layer of pure cobalt sulfide and an inner layer of a cerium sulfide mixed with cobalt sulfide and an innermost layer where cerium sulfide was mixed with cobalt metal. The cobalt sulfide formed a continuous CoS layer on the surface of the alloy, even though at rates reduced with respect to pure cobalt. Thus, a cerium content of 15% was not sufficient to prevent the sulfidation of the base metal. These results were interpreted by taking into account the limited solubility of cerium in the base metal and the presence in the alloy of intermetallic compound rich in cerium.

 

Key words: Co-Ce alloy sulfidation 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