The Lubrizol Corporation

Leonard S Cech

Barry M Saltzman

Eric L Rohr

John Bretz

Corrosion inhibitor compositions with improved activity are prepared from a neutral or overbased salt of an organic acid and another metal-containing corrosion inhibitor.

Corrosion inhibition composition

Corrosion inhibiting coating compositions are prepared comprising combining a mixture (I) of (A) a non-Newtonian colloidal disperse system comprising an alkali or alkaline earth metal carbonate predispersed in a dispersing medium in the presence of at least one organic alkali or alkaline earth salt of a carboxylic or sulfonic acid and (B) an acidic ester of a phosphoric acid with (II) a hydrocarbon resin which is substantially insoluble in said mixture (I) at temperatures below about 60.degree. C. The ester is typically a mono- or diester such as that from reaction of an alcohol and/or alkyl-substituted phenol and phosphorus pentoxide.

Corrosion inhibiting coating composition

Aqueous well-drilling fluids treated with additives comprising a non-Newtonian colloidal disperse system containing metal-containing particles, a dispersing medium and an organic compound having both a hydrophobic and a polar substituent in combination with at least one emulsifier are disclosed. Specific examples of the disperse system comprise calcium carbonate particles predispersed in a mineral oil dispersing medium in the presence of a calcium petrosulfonate; useful emulsifiers include alkylene oxide/fatty amine condensates. Well-drilling fluids containing such additives reduce the torque requirements in rotary drilling operations.

Growing community of inventors

Wickliffe, OH, United States of America

Leonard S Cech