Antifreeze concentrates and coolant compositions based on polyglycols and amides for protecting magnesium and the alloys thereof

US7588695B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Bernd Wenderoth · Lampertheim, DE
• Stefan Dambach · Nümbrecht, DE
• Gerhard Weiβ · Ludwigshafen, DE

Key dates

• Filing date: Mar 24, 2004
• Grant date: Sep 15, 2009
• Expiry date: Oct 2, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23F11/145
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Ready-to-use aqueous coolant compositions having alkylene glycols, glycerol and/or 1,3-propanediol and a) from 0.05 to 10% by weight, based on the total amount of the composition, of one or more polyethylene glycols and/or polypropylene glycols and b) from 0.01 to 10% by weight, based on the total amount of the composition, of one more carboxamides and/or sulfonamides are useful for inhibiting corrosion in the case of magnesium and magnesium alloys.