Surface treatment of metal
AssigneeThe British Petroleum Company p.l.c.
InventorsRichard A. Cayless, Prem S. Thukral
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Abstract
A method of inhibiting corrosion of a metal surface comprises applying to the metal surface an organic solvent in which is dissolved a phosphate monoester of a hydroxyalkyl acrylate or a hydroxyalkyl alkylacrylate which phosphate monoester has the general formula; ##STR1## where R.sub.1 is hydrogen, a methyl group or an ethyl group R.sub.2 is an alkyl group having from 2 to 10 carbon atoms and n is a positive integer from 1 to 20 The solution may also contain a diester of a hydroxyalkyl acrylate, a diester of a hydroxyalkyl alkylacrylate, hydroxyalkyl acrylate or hydroxyalkyl alkylacrylate. The method may also improve the adhesive strength of a subsequently applied protective coating e.g. paint.
Claims16
A method of inhibiting corrosion of a metal surface comprising applying to the metal surface an organic solvent in which is dissolved a phosphate monoester of a hydroxyalkyl acrylate or alkylacrylate which phosphate monoester has the general formula;
- ##STR5## where R.sub.1 is hydrogen, a methyl group or an ethyl group
- R.sub.2 is an alkyl group having from 2 to 10 carbon atoms and
- n is a positive integer from 1 to 20.
A method of inhibiting corrosion of a metal surface comprising applying to the metal surface a mixture comprising mono(2-hydroxyethyl methacrylate) acid phosphate, di(2-hydroxyethyl methacrylate) acid phosphate and 2-hydroxyethyl methacrylate which mixture is dissolved in an organic solvent selected from the group comprising toluene, xylene, acetone, trichloroethane, hexane and C.sub.1 to C.sub.10 alcohols.
Dependencies are inferred from the claim text.