Effect of noble metal on 304 SS oxide in high temperature water

被引：0
|
作者：
Kim, YJ [1 ]
机构：
[1] GE Global Res Ctr, Schenectady, NY 12301 USA
来源：
SURFACE OXIDE FILMS | 2004年 / 2003卷 / 25期
关键词：
D O I：
暂无
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The effect of noble metal treatment on the oxides formed on 304 stainless steel (SS) in high temperature water containing excess hydrogen was examined by transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS). The electrochemical corrosion potential (ECP) of noble metal treated 304 SS electrodes was also measured to confirm the presence of catalytically active noble metal oil the oxide surface. It was observed that under excess hydrogen water chemistry condition, the presence of Pt and Rh on the oxide surface promotes the transformation of alpha-Fe2O3 to a spinel Fe3O4 type, and when Zn is also present, a Zn-enriched outer oxide particle and a Cr-enriched inner oxide layer. The iron concentration in water is, thereby, increased.
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页码：322 / 334
页数：13
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