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
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
投稿时间:2017-02-20  修订日期:2017-08-20
DOI:10.16490/j.cnki.issn.1001-3660.2017.08.040
中文关键词:  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
英文关键词:galvanized sheet  accelerated corrosion test  neutral salt spray test  periodic immersion corrosion test  heat and humidity test
基金项目:
作者单位
冯利军 西南技术工程研究所,重庆 400039 
董鹏飞 北京科技大学 腐蚀与防护中心,北京 100083 
程正冲 西南技术工程研究所,重庆 400039 
刘琳 北京科技大学 腐蚀与防护中心,北京 100083 
董超芳 1.北京科技大学 腐蚀与防护中心,北京 100083;2.北京科技大学 腐蚀与防护教育部重点实验室,北京 100083 
李晓刚 1.北京科技大学 腐蚀与防护中心,北京 100083;2.北京科技大学 腐蚀与防护教育部重点实验室,北京 100083 
肖葵 1.北京科技大学 腐蚀与防护中心,北京 100083;2.北京科技大学 腐蚀与防护教育部重点实验室,北京 100083 
AuthorInstitution
FENG Li-jun Southwest Technology and Engineering Research Institute, Chongqing 400039, China 
DONG Peng-fei Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China 
CHENG Zheng-chong Southwest Technology and Engineering Research Institute, Chongqing 400039, China 
LIU Lin Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China 
DONG Chao-fang 1.Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China; 2.Key Laboratory for Corrosion and Protection (MOE), University of Science and Technology Beijing, Beijing 100083, China 
LI Xiao-gang 1.Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China; 2.Key Laboratory for Corrosion and Protection (MOE), University of Science and Technology Beijing, Beijing 100083, China 
XIAO Kui 1.Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China; 2.Key Laboratory for Corrosion and Protection (MOE), University of Science and Technology Beijing, Beijing 100083, China 
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中文摘要:
      目的 研究中性盐雾环境、中性盐雾加周浸环境和中性盐雾加湿热环境下镀锌板的腐蚀行为,明确不同加速腐蚀试验环境对镀锌板腐蚀行为的影响。方法 对镀锌板进行中性盐雾、中性盐雾加周浸、中性盐雾加湿热等不同类型的加速腐蚀试验,通过失重法、SEM、XRD以及极化曲线等方法,对比不同加速腐蚀试验类型对镀锌板腐蚀行为的影响。结果 在三种加速腐蚀试验环境下,镀锌板的腐蚀过程基本相同:镀锌层及白色锌锈腐蚀、锌层破裂、锌层完全脱落、基体碳钢腐蚀。腐蚀产物都以Zn(OH)2、γ-FeOOH、ZnO、Fe2O3等为主。三种环境下镀锌板的腐蚀都不均匀,不同位置的腐蚀情况存在一定差异。其中,中性盐雾环境下材料腐蚀情况最为严重,中性盐雾加周浸环境次之,中性盐雾加湿热环境下最轻。结论 三种加速环境都是主要通过Cl−在锌表面的沉降和溶解作用增强介质的导电性能,加剧锌层的腐蚀。在中性盐雾环境中,Cl−浓度最高,试样腐蚀最严重。在中性盐雾加周浸环境中,SO42−与Cl−协同作用,腐蚀也较严重。而中性盐雾加湿热环境中,Cl−被稀释,腐蚀情况最轻微。
英文摘要:
      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 Cl- 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.
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