2.Through the adjust of the vitriol-chrome-acid and trivalence chromic,can from the net contain additive common chromeplate liquid gain wide bright electric current density bound;
通过对硫铬比和三价铬的认真调整,能从不含添加剂的普通镀铬液获得宽的光亮电流密度范围;
3.Methods Alkali water abstract method,phenol-vitriol chromometry and standard sulfate chromometry was used for finding out the differences of the rough polysaccharide、glycon and sulfate contents.