SURFACE-REACTIONS AT 300-750-K IN THE IRON OXYGEN WATER-SYSTEM STUDIED BY SIMS

被引：20

作者：

HULTQUIST, G

SEO, M

LU, Q

CHUAH, GK

TAN, KL

机构：

[1] HOKKAIDO UNIV,FAC ENGN,KITA KU,SAPPORO,HOKKAIDO 060,JAPAN

[2] ROYAL INST TECHNOL,DEPT APPL ELECTROCHEM & CORROS SCI,S-10044 STOCKHOLM 70,SWEDEN

[3] NATL UNIV SINGAPORE,FAC SCI,SURFACE SCI LAB,SINGAPORE 0511,SINGAPORE

来源：

APPLIED SURFACE SCIENCE | 1992年 / 59卷 / 02期

关键词：

D O I：

10.1016/0169-4332(92)90297-B

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Secondary ion mass spectroscopy, SIMS, has been applied to the surface study of the iron-oxygen-water system in the 300-750 K temperature range in order to gain insight into the initial stages of wet oxidation of iron. During sputtering with Ar+ ions the emission of OH-containing ions was strongly dependent on temperature. In situ X-ray photoelectron spectrometry experiments were conducted in order to support this observation. In experiments where the metal was exposed simultaneously to (H2O)-O-18 and O-16(2), the source of O in the reaction product could be determined by analysis of the ions emitted at different temperatures. This analysis showed that a coupled reaction, 2Fe + H2O + 1/2O2 --> 2FeOH, is operating at room temperature. At higher temperatures iron reacts preferentially with water as can be seen from the abundance of O-18 in the emitted ions.

引用

页码：135 / 145

页数：11