Oxidation behavior of NixFe1-x(OH)2 in Cl--containing solution

被引:9
作者
Chung, KW
Kho, YT
Kim, KB
机构
[1] Yonsei Univ, Dept Met Engn, Seodaemoon Ku, Seoul 120749, South Korea
[2] Korea Gas Corp, R & D Ctr, Ansan, Kyoungido, South Korea
关键词
Ni; IR spectroscopy; XRD;
D O I
10.1016/S0010-938X(02)00065-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The addition of Ni leads to the formation of protective rust layer on steel and subsequently high corrosion resistance of steel in Cl--containing environment. alpha-FeOOH, beta-FeOOH, gammaFeOOH and Fe3O4 are formed mainly on steels exposed to Cl--containing atmosphere. It is expected that systematic investigation of the effect of Ni(II) on the formation process of each oxide in solution should lead to elucidation of the role of Ni in the formation of anticorrosive oxide layer. This study reports the oxidation behavior of NixFe1-x(OH)(2) in Cl--containing solution at two different pH regions (condition I under which solution pH is allowed to decrease and condition II under which solution pH is maintained at 8) where gamma-FeOOH and Fe3O4 are predominantly formed, respectively, upon the oxidation of Fe(OH)(2). In the presence of Ni(II) in the starting solution, the formation of Ni(II) doped beta-FeOOH with very low crystalline was facilitated and the formation of gamma-FeOOH was suppressed with increasing Ni(II) content and with increasing oxidation rate of Fe(II). Ni(II) was found to have Fe3O4-suppressing effect under condition II. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:2757 / 2775
页数:19
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