Method for working or forming metals in the presence of aqueous lubricants based on methanesulfonic acid
View Patent ↗A method for working or forming metals which consists in usings an aqueous lubricant containing as water-soluble extreme pressure additive, methanesulphonic acid or water-soluble methanesulphonic acid salt. The water-soluble methane sulphonic acid salt is an alkali or alkaline-earth, ammonium, alkanol amine or ethoxylated fatty amine salt. The inventive aqueous lubricants have good extreme pressure properties and good properties with respect to corrosion.
1. A method for working or forming metals in the presence of an aqueous lubricant wherein the improvement comprises adding a water-soluble extreme pressure additive comprising from about 0.01 to about 20 percent by weight a water-soluble salt of methanesulfonic acid comprising a salt of an alkali or alkaline-earth metal, or of a compound of the formula:
R 1 NR 2 R 3
wherein R 1 , R 2 and R 3 , are identical or different, each a hydrogen atom, an alkyl, alkenyl or alkylaryl radical with 1 to 22 carbon atoms, or an oxyethylated radical of the form (CH2-CHrO)nH, where n is between 1 and 20 to said aqueous lubricant.
2. The method as claimed in claim 1 , wherein said water soluble methanesulfonic acid salt is a sodium or potassium salt.
3. The method as claimed in claim 1 , wherein said compound of the formula R 1 NR 2 R 3 is an alkanolamine.
4. The method of claim 3 wherein said alkanolamine is a monoethanolamine, diethanolamine or triethanolamine.
5. The method as claimed in claim 1 , wherein said compound of the formula R 1 NR 2 R 3 is an ethoxylated amine in which R 1 is a radical with 12 to 22 carbon atoms and R 2 and R 3 are oxyethylated radicals of the formula (CH 2 —CH 2 —O)nH with n between 1 and 10.
6. The method of claimed in claim 1 wherein the concentration of water-soluble methanesulfonic acid salt in said aqueous lubricant is between about 0.1% and 10% by weight.