Method for bronze galvanic coating

A method for electrolytic deposition of bronze onto a substrate, the method comprising:

• immersing a substrate in an aqueous acidic electrolyte containing:
• a) tin ions;
• b) copper ions;
• c) an alkylsulfonic acid;
• and
• d) an aromatic, nonionic wetting agent.

An aqueous acidic electrolyte containing:

• a) tin ions;
• b) copper ions;
• c) an alkylsulfonic acid;
• and
• d) an aromatic, nonionic wetting agent.

An aqueous acidic electrolyte containing:

• a) divalent tin ions at a concentration of from about 2 to about 75 g/L of electrolyte;
• b) divalent copper ions at a concentration of from about 2 to about 70 g/L of electrolyte;
• c) an aromatic, nonionic wetting agent at a concentration of from about 2 to about 40 g/L of electrolyte;
• d) a stabilizer, complexing agent, or mixture thereof at a concentration of less than about 50 g/L of electrolyte;
• e) a wetting agent selected from the group consisting of an anionic wetting agent, a nonionic, aliphatic wetting agent, and mixtures thereof at a concentration of less than about 10 g/L of electrolyte;
• f) an oxidation inhibitor at a concentration of less than about 5 g/L of electrolyte;
• g) a brightener at a concentration of less than about 5 g/L of electrolyte;
• and
• h) an alkylsulfonic acid at a concentration of at least about 140 g/L of electrolyte.