Effects of Composition of Organic Additives and Electrolytic Conditions on Surface Appearance of Electrodeposited Zinc

摘要

In the present investigation, we studied effects of composition of organic additioves and electrolysis conditions for surface appearance of electrodeposited zinc. When organic additive PEG (Ployethylene Glycol) increased in electrolyte, the current efficiency decreased and grains of plated film changed with fine structures of staking typed form. The current density increased with decreasing limit current density and current efficiency, but an increase of the flow rate allowed electroplating at high current density. When PEG(Ployethylene Glycol) additives increase, high angle pyramid plane is tilted to 65 deg and preferred crystallographic orientated with (101) and then (112) peak increase. Whiting degree of plating film surface is decided by crystallographic orientation and grain size. In the case of the matrix with paralleled basic plane(002) which is preferentially oriented, higher degree of whiteness is shown because incident light on sheet surface is regularly reflected.