钢表面热浸镀AlZnSi合金镀层防腐蚀技术研究

创新性地采用了热浸镀二次助镀工艺，对常用型钢试样表面进行防腐蚀处理，如镀Zn，镀Al-Zn-Si合金，镀Zn-Re及镀Al-Zn-Si-Re合金.对热浸镀处理后的型钢试样进行拉伸试验，对其组织形貌进行观察，对其力学性能进行测试.另外，在实验室条件下进行模拟酸雨试验和盐雾试验，对各类镀层的耐腐蚀性能进行研究，并与工业镀Zn件的耐蚀性进行对比研究，进而对其使用寿命进行预测.结果表明：热浸镀工艺对型钢的力学性能无不利影响，两种镀层防腐蚀性能优秀，Al-Zn-Si合金镀层对钢材表面的防腐蚀性能卓越，而Al-Zn-Si-Re合金的防腐蚀性能更佳.

Anti-corrosion Technology Research for Hot-dip Al-Zn-Si Alloy Coating on Steel Surface

The supplementary secondary hot-dip technology as an innovative technique was used to carry out anti-corrosion treatment of the common steel surface,such as galvanizing,hot-dip Al-Zn-Si alloy,hot-dip Zn-Re and hot-dip Al-Zn-Si-Re alloy.Tensile tests were performed on the hot-dip treated specimens,and the microstructure and the mechanical properties of the treated samples were investigated.Moreover,the salt spray test and simulated acid rain test were carried out in laboratory conditions,and anti-corrosion performance of the specimens was researched accordingly.Then the comparative analyses were made among different kinds of hot-dip specimens and industrial galvanized samples.The estimated lifetime of different kinds of coatings are forecasted by comparative analysis.The result shows that the hot-dip technologoy has no negative impact for the mechanical property for steels.All the coatings have positive anti-corrsion performance.The performance of Al-Zn-Si coating is excellent,and the Al-Zn-Si-Re coating is even better.