全无铬钝化镀锌板成形后的耐腐蚀性能  

Corrosion resistance of chromium-free passivated hot-dip zinc-coated steel sheet after forming

作　　者：董妮妮[1] 何道娟[1] 刘武华[1] 梁立川 刘翔宇 郭敏 DONG Nini;HE Daojuan;LIU Wuhua;LIANG Lichuan;LIU Xiangyu;GUO Min(Shougang Jingtang United Iron&Steel Company,Tangshan 063200,China;Marketing Center,Beijing Shougang Co.,Ltd.,Beijing 100043,China)

机构地区：[1]首钢京唐钢铁联合有限责任公司,河北唐山063200 [2]首钢股份营销中心,北京100043

出　　处：《电镀与涂饰》2023年第19期56-62,共7页Electroplating & Finishing

摘　　要：采用扫描电镜(SEM)和辉光放电光谱仪(GDS)研究了变形量对全无铬钝化镀锌板表面形貌和元素分布的影响。通过电化学分析、中性盐雾试验、循环盐雾试验和硫酸铜点滴试验,对比了不同变形量时全无铬钝化板的耐蚀性。结果表明,当主应变增大到3%时,钝化膜表面开始出现裂纹;随着主应变的继续增大,裂纹尺寸逐渐加大,裂纹主要出现在光整坑内部。随变形量增大,全无铬钝化板的耐蚀性变差。The effect of deformation of chromium-free passivated hot-dip zinc-coated sheet on its surface morphology and elemental distribution was studied by scanning electron microscopy(SEM)and glow discharge spectrometry(GDS).The corrosion resistance of chromium-free passivated hot-dip zinc-coated steel sheet after deformation with different principal strains was compared by electrochemical analysis,neutral salt spray test,cyclic salt spray test,and copper sulfate dropping corrosion test.The results showed that some micro-cracks appeared on passivate film when the principal strain was increased to 3%.The size of micro-crack became larger with the further increasing of principal strain.The micro-cracks mainly distributed at the pits which were formed during the finishing process.The corrosion resistance of chromium-free passivated hot-dip zinc-coated steel sheet became worse with the increasing of principal strain.

关 键 词：镀锌板 无铬钝化 成形 耐蚀性 

分 类 号：TG178[金属学及工艺—金属表面处理]