| 摘要 |
<p>A zincate type Zn-Fe alloy electroplating bath is disclosed which comprises a Zn compound, an alkali hydroxide, a Fe(II, III) salt, a complexing agent for dissolving the Fe(II, III) salt and a brightening agent. The brightening agent comprises a compound obtainable by quaternizing a derivative of thiourea with an alkylating agent bearing C1-C4 alkyl groups, and an alkylated polyalkylene polyamine obtainable by alkylating one or more of the basic nitrogen atoms of a polyalkylene polyamine with an alkylating agent bearing C1-C3 alkyl groups.</p> |
