New additives for water-based cutting fluids

Fatty acids containing a carboxymethylthio group were prepared from the reaction of fatty acids and mercaptoacetic acids. Corrosion and lubrication tests for these products as water-based cutting fluid additives were carried out. We have found that triethanol amine salts of 11-(carboxylmethylthio)undecanoic acids and other similar products showed effective rust-inhibiting and anti-wear properties for water-based cutting fluids.