摘要
采用2种定制的热浸镀锌试件,经5000 h中性盐雾试验后发现镀层防腐性能存在显著差异.采用镀锌层厚度损耗测试法、X射线衍射分析法(XRD)和扫描电镜分析法(SEM)分别测试了镀层的厚度损耗量、盐雾试验前后的晶体物质组成和腐蚀前后的微观形貌.研究表明:2种热浸镀锌试件在盐雾腐蚀过程中的产物和机理相似,而影响其防腐性能的主要因素为热浸镀锌的生产工艺、腐蚀产物的致密程度.
Two hot-dip galvanized products are applied onto the steel substrates, then the specimens are tested for 5000 h by the neutral salt spray and there are obvious differences in the anti-corrosion perform-ance between the coatings. The thickness loss of coatings, crystal material compositions and microstruc-tures of the coatings are analyzed by Zinc coating thickness loss test method, differential scanning calo-rimetry （ DSC ） , and X-ray diffraction analysis （ XRD ） . The results show that there is no significant difference of the corrosion products and corrosion mechanisms between two coatings. Nevertheless, the hot-dip galvanized production process, the degree of densification of the corrosion products in coating are the primary factors influencing the anti-corrosion performance of the hot-dip galvanized coating.
出处
《广东工业大学学报》
CAS
2016年第4期74-78,共5页
Journal of Guangdong University of Technology
基金
榆林市产学研合作项目(2014cxy-05)
榆林学院博士
硕士科研启动基金项目(14GK32)
关键词
热浸镀锌
中性盐雾试验
防腐性能
hot-dip galvanized
neutral salt spray test
anti-corrosion performance
