Corrosion product film formed on the 90/10 copper-nickel tube in natural seawater: Composition/structure and formation mechanism

被引：180
作者：
Ma, A. L. [1 ]
Jiang, S. L. [1 ]
Zheng, Y. G. [1 ]
Ke, W. [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
来源：
CORROSION SCIENCE | 2015年 / 91卷
基金：
中国国家自然科学基金;
关键词：
Alloy; EIS; EPMA; Raman spectroscopy; XPS; Passive films; CU-NI ALLOYS; POTENTIAL-PH DIAGRAMS; SEA-WATER; IN-SITU; ELECTROCHEMICAL CORROSION; RAMAN-SPECTROSCOPY; CHLORIDE SOLUTIONS; BEHAVIOR; FAILURE; 70CU-30NI;
D O I：
10.1016/j.corsci.2014.11.028
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Composition/structure of the film formed on 90/10 copper nickel tube immersed in seawater for one month were investigated using EPMA, Raman spectroscopy, XPS, etc., revealing enrichment of Ni and Fe and depletion of Cu in the film with highest enrichment of Fe (gamma-FeOOH and metallic Fe) in the outer-layer and Ni (NiO/Ni(OH)(2) and metallic Ni) in the inner-layer, and Cu-rich grains in the mid-region. Higher corrosion resistance of the film than the unfilmed sample was demonstrated by EIS and polarization resistance. Growth modes of the Cu2O film, existence of Cu-rich grains, and enrichment mechanisms of Ni and Fe were discussed. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：245 / 261
页数：17
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