Effects of salts and its mixing ratio on the corrosion behavior of 316 stainless steel exposed to a simulated salt-lake atmospheric environment

被引：18

作者：

Guo, Mingxiao ^{[1
,2
]}

Tang, Junrong ^{[1
,2
]}

Peng, Can ^{[1
,2
]}

Li, Xiaohan ^{[1
,2
]}

Wang, Chuan ^{[1
]}

Pan, Chen ^{[1
]}

Wang, Zhenyao ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2022年 / 276卷

基金：

中国国家自然科学基金;

关键词：

NaCl salts; Atmospheric corrosion; 316 stainless steel; Salt-lake atmosphere; Pitting corrosion; Mixed MgCl2; RELATIVE-HUMIDITY; PITTING CORROSION; STOCHASTIC-PROCESSES; LOCALIZED CORROSION; PIT GENERATION; AEROSOLS; EFFLORESCENCE; PARTICLES; ALUMINUM; MODEL;

D O I：

10.1016/j.matchemphys.2021.125380

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of mixed salts and mixing ratio on the corrosion behavior of 316 stainless steel exposed to a simulated salt-lake atmosphere has been firstly investigated. 316 stainless steel was mainly analyzed by the evolution of surface morphologies, composition of corrosion products, statistics of pits depth and width and electrochemical measurements. The results indicated a layered double hydroxides (LDH) was detected in the corrosion products formed on 316 stainless steel surface under different salt deposition conditions, except under single NaCl deposition condition. When the mole fraction of NaCl was 0.75 in mixed MgCl2 - NaCl salts, the corrosion rate of 316 stainless steel was the fastest. The width of the pits formed on the surface of 316 stainless steel under mixed MgCl2 - NaCl salts deposition conditions was smaller than that under single MgCl2 deposition condition. The differences in corrosion rate and pit width size of 316 stainless steel under mixed MgCl2 - NaCl salts deposition conditions and single MgCl2 deposition condition were related to diffusion barrier provided by the neighboring NaCl crystals precipitated in thin liquid film during the humidification process and dehydration process.

引用

页数：10

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