Effect of Mixed Salts on Atmospheric Corrosion of 304 Stainless Steel

被引：18

作者：

Guo, Liya ^{[1
,2
]}

Mi, Na ^{[1
]}

Mohammed-Ali, Haval ^{[1
,3
]}

Ghahari, Majid ^{[1
]}

Du Plessis, Andrew ^{[1
]}

Cook, Angus ^{[1
]}

Street, Steven ^{[1
]}

Reinhard, Christina ^{[4
]}

Atwood, Robert C. ^{[4
]}

Rayment, Trevor ^{[4
]}

Davenport, Alison J. ^{[1
]}

机构：

[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

[2] Imperial Coll London, Dept Mat, London SW7 2AZ, England

[3] Univ Zakho, Dept Phys, Zakho, Iraq

[4] Diamond Light Source Ltd, Didcot OX11 0DE, Oxon, England

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2019年 / 166卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

X-RAY MICROTOMOGRAPHY; PITTING CORROSION; STAINLESS-STEEL; LOCALIZED CORROSION; RELATIVE-HUMIDITY; TRANSITIONS; TOMOGRAPHY; PARTICLES; AEROSOLS; BEHAVIOR;

D O I：

10.1149/2.0021911jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Atmospheric corrosion of stainless steel can take place when airborne salt particles deposit on the metal surface, forming droplets when the relative humidity (RH) reaches a critical value: the deliquescence relative humidity of the salt. Most work to date has focused on single salts such as MgCl2 or NaCl. In the present work, the effect of mixed salts is investigated at 45% RH, above the deliquescence relative humidity of MgCl2 but below that of NaCl. Dish-shaped pits were found in pure MgCl2 solutions and mixed solutions. Crevice corrosion takes place under NaCl crystals. This is shown both with ex situ measurements and in situ time-dependent measurements using X-ray microtomography, where pit growth was also monitored. (c) The Author(s) 2019. Published by ECS.

引用

页码：C3010 / C3014

页数：5

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