电镀铬板表面腐蚀行为的研究  

Study on Surface Corrosion Behavior of Tin Free Steel Product

作　　者：韦晓[1] 李秀军[1] 李建中[2] 

机构地区：[1]宝山钢铁股份有限公司冷轧薄板厂,上海200431 [2]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《有色矿冶》2015年第5期35-38,共4页Non-Ferrous Mining and Metallurgy

摘　　要：镀铬板在食品包装领域有着广泛的应用。本文采用电子扫描电镜、粗糙度分析和原子力显微镜,研究了镀铬板表面腐蚀行为。结果表明,对于二次冷轧镀铬板,其表面的锈蚀缺陷主要为条状,且沿着轧制纹方向生长。镀铬板表面镀层结构对腐蚀行为有着重要影响,金属铬层表面腐蚀孔隙为粗大型,而氧化铬层表面腐蚀孔隙呈扁平状。根据粗糙度分析可知,镀铬板及其基板表面粗糙度值差别不大。但镀铬板表面轧制纹的峰值更为尖锐。结合原子力显微镜分析可知,镀铬晶粒主要生长在"凸出"轧制纹附近。在镀层厚度相同条件下,由于存在"毛细"现象,镀铬板表面孔隙主要产生于"凸起"的轧制纹处;而对于电火花磨辊方式轧制的冷轧钢基板形成的镀层不易产生孔隙。Tin free steel is widely used in the field of food packaging. In this paper, the surface corrosion behavior of tin free steel is studied by using scanning electron microscopy, roughness analysis and atomic force microscopy. The results show that, for the double cold--rolled tin free steel, the surface corrosion defect is mainly the strip, and along the growth direction of the rolling lines. Surface coating structure of tin free steel has an important influence on the corrosion behavior of tin free steel surface, corrosion pore of chromium layer surface are presented coarse scale, while the pore on chromium oxide layer surface is flat. According to the roughness analysis, surface roughness of tin free steel and substrate are found almost same. But the rolling lines peaks for tin free steel surface show more sharp. Analysis of atomic force microscopy, chrome plated grain grow mainly in the ＂rolling lines near the bulge＂. For the coating thickness under the same conditions, rolling lines at the pore surface chrome plate mainly from ＂bulge＂, due to the existence of ＂capillary＂ phenomenon. As the cold rolled steel substrate by electrical spark grinding roller, the forming coating is not easy to produce pore.

关 键 词：镀铬板 表面粗糙度 腐蚀 行为 

分 类 号：TG174.4[金属学及工艺—金属表面处理]