表面技术2017，Vol.46Issue(8)：246-253,8.DOI:10.16490/j.cnki.issn.1001-3660.2017.08.040
镀锌板在不同加速腐蚀环境下的腐蚀行为研究
Corrosion Behaviorof Galvanized Sheet in Different Accelerated Corrosion Environment
冯利军 1董鹏飞 2程正冲 1刘琳 2董超芳 2李晓刚 3肖葵2
作者信息
- 1. 西南技术工程研究所,重庆400039
- 2. 北京科技大学腐蚀与防护中心,北京100083
- 3. 北京科技大学腐蚀与防护教育部重点实验室,北京100083
- 折叠
摘要
Abstract
The work aims to study corrosion behavior of galvanized sheet in neutral salt spray,neutral salt spray & periodic immersion as well as neutralsalt spray &heat and humidity environments,so as to clarify effects of different accelerated corrosion test environment on corrosion behavior of galvanized sheet.Different kinds of accelerated corrosion test including neutral salt spray,neutral salt spray & periodic immersion as well as neutralsalt spray &heat and humidity environments were performed to galvanized sheet.Effects of different accelerated corrosion test types on corrosion behavior of galvanized sheet were compared in weight loss method and using SEM,XRD and polarization curve.Corrosion process of galvanized sheet was basically the same in three accelerated corrosion environment:zinc coating and white zinc were rusted and corroded,zinc coating fractured and fell off completely,and substrate carbon steel was corroded.Corrosion products were mainly Zn(OH)2,γ-FeOOH,ZnO,Fe2O3.Galvanized sheet was corroded unevenly in three environment,and corrosion conditions varied in different positions.Corrosion of galvanized sheet was most serious in neutral salt spray environment,more serious in neutral salt spray & periodic immersion environment,and the least in neutralsalt spray & heat and humidity environment.Three accelerated environments enhances conductivity of the medium based upon deposition and dissolution of CV on zinc surface,and accelerates corrosion of zin coating.Cl-concentration is the highest,and sample corrosion is the worst in neutral salt spray environment.SO42-and Cl-have synergistic effect and corrosion is relatively severe in salt spray and periodic immersion environment.The Cl-is diluted and corrosion is slight in neutralsalt spray &heat and humidity environment.关键词
镀锌板/加速腐蚀试验/中性盐雾试验/周期浸润试验/湿热试验Key words
galvanized sheet/accelerated corrosion test/neutral salt spray test/periodic immersion corrosion test/heat and humidity test分类
矿业与冶金引用本文复制引用
冯利军,董鹏飞,程正冲,刘琳,董超芳,李晓刚,肖葵..镀锌板在不同加速腐蚀环境下的腐蚀行为研究[J].表面技术,2017,46(8):246-253,8.
