| 摘要 |
<p>This invention relates to a method of producing lustrous to brilliant zinc electrodeposits, which comprises passing current from a zinc anode to a metal cathode for a time period sufficient to deposit a lustrous to brilliant zinc electrodeposit upon said cathode. The current passes through an aqueous acidic bath composition containing at least one zinc compound providing zinc cations for electroplating zinc. The zinc compound is selected from the group consisting of zinc sulfate, zinc chloride and zinc sulfamate. Chloride anions are added as salts of bath compatible cations excepting ammonium; in the absence of complexing or chelating agents of organic nature; and containing, as cooperating additives, at least one alkyl propoxyethoxy polyether, at least one aromatic sulfonate emulsifying agent, and at least one aromatic carbonyl compound. The zinc deposits made according to the invention are lustrous to brilliant, smooth, relatively ductile, low in internal stress, have low tarnishing tendencies and good receptivity to conversion coatings.</p> |
