The self-sustaining propagation of crevice corrosion on the hybrid BC1 Ni-Cr-Mo alloy in hot saline solutions

被引：19

作者：

Ebrahimi, N. ^{[1
]}

Noel, J. J. ^{[1
]}

Rodriguez, M. A. ^{[2
]}

Shoesmith, D. W. ^{[1
]}

机构：

[1] Univ Western Ontario, Dept Chem & Surface Sci Western, London, ON, Canada

[2] UNSAM CNEA, Gerencia Mat, CNEA, CONICET,Inst Sabato, Buenos Aires, DF, Argentina

来源：

CORROSION SCIENCE | 2016年 / 105卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Nickel; Galvanostatic; SEM; High temperature corrosion; Crevice corrosion; CHLORIDE SOLUTIONS; ELECTROCHEMICAL IMPEDANCE; TEMPERATURE; NICKEL; BEHAVIOR; REPASSIVATION; STABILIZATION; MOLYBDENUM; INITIATION; MECHANISM;

D O I：

10.1016/j.corsci.2016.01.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The initiation and propagation of crevice corrosion on the BC1 nickel-chromium-molybdenum alloy has been studied galvanostatically in concentrated chloride solution at 120 degrees C, and the distribution of corrosion damage determined using surface analytical techniques. The distribution of damage was dependent on the applied current and showed an increased tendency to spread across the surface as the applied current was increased. Attempts to induce repassivation by galvanodynamically reducing the current to zero were unsuccessful. Galvanic coupling to a large BC1 counter electrode showed propagation could be maintained by oxygen reduction on the coupled electrode at a slow rate for >1200 h. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：58 / 67

页数：10

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