Effects of partially substituting cobalt for nickel on the corrosion resistance of a Ni-16Cr-15Mo alloy to aqueous hydrofluoric acid

被引：39

作者：

Li, Yunping ^{[1
]}

Fan, Xiuru ^{[2
]}

Tang, Ning ^{[1
]}

Bian, Huakang ^{[2
]}

Hou, Yuhang ^{[2
]}

Koizumi, Yuichiro ^{[1
]}

Chiba, Akihiko ^{[1
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, Sch Engn, Sendai, Miyagi 9808577, Japan

来源：

CORROSION SCIENCE | 2014年 / 78卷

关键词：

Interfaces; Alloy; Acid solutions; Acid corrosion; Cobalt; Nickel; CR-P ALLOYS; SULFURIC-ACID; NI; BEHAVIOR; MO; TEMPERATURE; OXIDATION; STATE; FILM;

D O I：

10.1016/j.corsci.2013.09.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study examined the effect of partially substituting cobalt for nickel in Ni-16Cr-15Mo alloy on corrosion resistance to 5.2 M HF acid solution at 100 degrees C. Microstructural characterisations revealed that cobalt substitution did not have a detrimental effect on corrosion resistance, but rather, it seems to enhance the formation of a compact and thin Mo-rich passive film by selective dissolution of elements. Heat-annealing drastically lowered the corrosion resistance due to Mo-rich precipitate of alloy, which lowered the concentration of Mo in bulk matrix, in particular close to precipitate sections, leading to inhibition of formation of homogenous and compact Mo-rich passive film. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.

引用

页码：101 / 110

页数：10

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