| 摘要 |
A brightening agent is provided for the electrodeposition of zinc from an aqueous acid plating bath. The brightening agent is composed of an alpha-amino aliphatic carboxylic acid, a nonionic surface active compound and a carbonyl compound. The brightening agent may be added to an electroplating bath containing zinc ions, chloride ions, and boric acid. The use of the brightening agent eliminates the use of ammonium chloride as a bath constituent, and unexpectedly produces bright electrodeposits at extremely high current densities.
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