摘要
弥散在镀锡材料表面的颗粒状黑色物质—黑灰 ,主要产生于软熔阶段和阴极电解钝化阶段。采用扫描电镜与能谱分析 ,测试了黑灰的形貌及黑灰的主要成分。研究了阴极电解钝化处理时 ,钝化液浓度、pH值、温度、老化程度、阴极钝化电量以及杂质离子对黑灰程度的影响。在电解钝化工艺条件为钝化液浓度 ρ(Na2 Cr2 O7·2H2 O) =2 5 g/L ,pH =4.5 ,θ =38～ 45℃及钝化电量σ =1.6 2～ 4.86C/dm2 时 ,产生黑灰最少。
The smudges on tinplating steel sheet are mainly formed during flowing and electrolytic passivation treatment. The appearance and component of smudges were analyzed by means of SEM and EDS. The factors of electrolytic passivation, including the concentration of passivation solution, pH value, temperature, aging time, electric charge of passivation and impurity were studied. It is shown that smudges are least produced at technique parameters ρ(Na 2Cr 2O 7·2H 2O)=25 g/L, pH=4.5, θ =38～45 ℃, electric charge of passivation σ =1.62～4.86 C/dm 2.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2000年第4期587-590,共4页
The Chinese Journal of Nonferrous Metals
