镀锡板边部漆膜附着力控制工艺研究  

Research on the Control Process of Paint Adhesion on the Edge of Tinplate

作　　者：宋浩 方圆 万一群[3] 石云光 王爱红[3] 胡娜[3] 王振文[3] SONG Hao;FANG Yuan;WAN Yi-qun;SHI Yun-guang;WANG Ai-hong;HU Na;WANG Zhen-wen(Research Institute of Technology of Shougang Group Co.,Ltd.,Beijing 100043,China;Beijing Key Laboratory of Green Recyclable Process for Iron&Steel Production Technology,Beijing 100043,China;Shougang Jingtang United Iron&Steel Co.,Ltd.,Tangshan 063200,China)

机构地区：[1]首钢集团有限公司技术研究院,北京100043 [2]绿色可循环钢铁流程北京市重点实验室,北京100043 [3]首钢京唐钢铁联合有限公司,河北唐山063200

出　　处：《材料保护》2023年第2期94-99,110,共7页Materials Protection

摘　　要：针对镀锡板边部漆膜附着力不良问题,通过电化学工作站、漆膜附着力测试仪和恒电位仪研究了软熔工艺、钝化电荷密度、带钢速度及钝化极板宽度对镀锡板边部镀层、漆膜附着力及耐蚀力的影响。结果表明:镀锡板边部钝化膜含量增加是边部附着力变差的主要原因。钝化电荷密度由0.5 C/dm^(2)降低到0.1 C/dm^(2),镀锡板边部与中部位置的漆膜附着力均能达到1级,但会导致耐蚀力不足。通过降低带速到350 m/min或缩窄钝化极板宽度到840 mm均可以降低钝化的边缘效应,镀锡板边部与中部位置的漆膜附着力均达到1级,耐蚀力达到0级。缩窄钝化极板宽度是提升镀锡板边部漆膜附着力的最佳选择。To solve the problem of poor paint adhesion on the edge of tinplate,electrochemical workstation,paint film adhesion tester and potentiostat were employed to study the effects of reflow process,passivation charge density,strip speed and passivation electrode plate width on the coating,paint adhesion and corrosion resistance of tinplate edge.Results showed that the increase of the passive film content on the edge of the tinplate was the main reason for the deterioration of the paint adhesion.When the passivation charge density was reduced from 0.5 C/dm^(2) to 0.1 C/dm^(2),the adhesion of the paint film at the edge and middle of the tinplate could reach level 1,but it would cause insufficient corrosion resistance.Reducing the belt speed to 350 m/min or narrowing the passivation plate width to 840 mm could reduce the edge effect of passivation,and the paint film on the edge and middle of the tinplate possessed a paint adhesion of grade 1 and a corrosion resistance of grade 0.Hence,narrowing the passivation plate was the best choice to improve the adhesion of the paint film on the edge of the tinplate.

关 键 词：漆膜附着力 软熔工艺 钝化工艺 边缘效应 耐蚀力 

分 类 号：TG174[金属学及工艺—金属表面处理]