| 摘要 |
A bright acid zinc plating bath uses a surfactant or wetting agent having the general formula CnH2n+1 (OCH2CH2)x OCH2COOH wherein n is either 8 or 9, and wherein between 30 and 70% of the surfactant contains between 17 and about 21 ethylene oxide groups and 70-30% contains between about 9 and about 12 ethylene oxide groups. When used with organic brighteners, the blend of surfactants permits the electrodeposition of a bright layer which resists the formation of haze or blush which can occur when a plated part is flexed or is subjected to elevated temperatures encountered, e.g., upon curing of a protective lacquer coating.
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