Method for electrolytic galvanizing using electrolytes containing alkane sulphonic acid

US6811673B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Gregor Brodt · Heppenheim, DE
• Jens Haas · Ludwigshafen, DE
• Werner Hesse · Großburgwedel, DE
• Hans-Ulrich Jager

Key dates

• Filing date: Jan 10, 2003
• Grant date: Nov 2, 2004
• Expiry date: Jan 10, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D3/22
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Matt surfaces are obtained when a metal is coated electrolytically with zinc from an electrolyte solution which containszinc sulfate or an alkanesulfonate of zinc or mixtures thereof, and optionally further metal salts,sulfuric acid or an alkanesulfonic acid or a mixture thereof, andat least one additive selected from nitrogen-containing surface-active compounds, which may be ionic or nonionic, sulfur-containing anionic surface-active compounds, and surface-active compounds based on multifunctional alcohols having at least three hydroxyl groups.