| 摘要 |
PURPOSE:To form a highly lustrous and fine galvanized surface on which fingerprints are hardly left by adding polyacrylamide having a specified structure having cationic groups to a prescribed galvanizing bath. CONSTITUTION:Acrylamide is copolymerized with 1-20mol% cationic monomer, and the resulting polyacrylamide represented by general formula I is added to a prescribed acidic galvanizing bath by 0.2-20g/l. Polyacrylamide represented by general formula II may be added to the bath by 0.2-20g/l. The polyacrylamide is obtd. by copolymerizing acrylamide with 1-20mol% cationic monomer and >=20mol% vinyl monomer. When the galvanizing bath contg. the copolymer represented by the formula I or II is used, a highly lustrous galvanized surface on which fingerprints are hardly left can be formed under various galvanizing conditions.
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