Synopsis Studies are carried out on the relationship between the chromium content in the chromate passivation film of the tin plate surface and the concentration and temperature of chromate the intensity of the cathodic passivation current and the quantity of electricity .

研究了 镀锡板表面铬酸盐钝化膜中的含铬量与 铬酸盐浓度、温度、阴极钝化电流密度、钝化电量的关系。

The excess tin chloride addition produces black mercury precipitation and is about to seriously affect the determination of iron by using potassium chromate volumetric analysis method .

重铬酸钾容量法测铁中，二氯化 锡超量产生黑色汞沉淀，严重影响测定。