ADDITIVE FOR ACID ZINC ALLOY PLATING BATH, ACID ZINC ALLOY PLATING BATH, AND METHOD FOR PRODUCING ZINC ALLOY PLATED ARTICLE

摘要

An additive for an acid zinc alloy plating bath includes an aliphatic polyamine having not more than 12 carbon atoms. The acid zinc alloy plating bath includes a buffer including an acetic acid-containing material containing acetic acid and/or acetate ions. A method for producing a zinc alloy plated article including an article and a zinc alloy plated coating formed on a plating surface of the article includes forming the zinc alloy plated coating by electroplating using the acid zinc alloy plating bath.

主权项

1. An additive for an acid zinc alloy plating bath, the additive comprising:
an aliphatic polyamine having not more than 12 carbon atoms; and a buffer comprising
an acetic acid-containing material that contains acetic acid and/or acetate ions at a concentration of not less than 10 g/L expressed as a content of acetic acid, anda boric acid-containing material that contains boric acid and/or boric acid ions at a concentration of not more than 0.1 g/L expressed as a content of boric acid, and wherein the buffer comprises no ammonia-containing material that contains ammonia and/or ammonium ions.