Asymmetrical diesters of ortho-phosphoric acid useful as corrosion inhibitors

摘要

Asymmetrical phosphate esters of formula I <IMAGE> I in which R is C1-20alkyl, R1 is C1-20alkyl, R2 is hydrogen or methyl x is 1-15 and M is hydrogen, an alkali metal ion or an equivalent of an alkali earth metal or zinc ion are effective inhibitors of oxidative corrosion of metals in the presence of electrolytes. They may be used alone or in conjunction with further additives, and are preferably dissolved in the electrolyte with which the metal is to come in contact.