Corrosion inhibitors, improved paint and corrosion protection coating

摘要

A corrosion inhibiting composition comprising at least one polymer comprising anion-exchange groups, wherein said anion-exchange groups comprise the form of basic anions. The basic anions may be weakly basic anions. Preferably the anions are nitrite, nitrate, carboxylic, acetate, benzoate, propionate, phthalate, hydrogen carbonate, borate, hydrogen phosphate, silicate, carbonate, or dicyanamide anions. The polymer may comprise imidazolium, pyridinium or phosphonium groups. Preferably the polymer comprises a quaternary nitrogen that is bound by three alkyl bridges to the polymer chain. The polymers may be alkali-resistant copolymers with acrylates. Also disclosed is a corrosion protecting paint comprising a strong basic anion exchange resin and tribasic strontium phosphate. Further disclosed is a corrosion inhibiting epoxy resin paint comprising at least one reactive thinner comprising an epoxy group and a cationic group of trialkylammonium, benzyldialkylammonium, phosphonium, sulfonium, imidazolium or pyridinium in the form of a basic salt, nitrite or nitrate. Also disclosed is a corrosion inhibiting epoxy resin paint comprising 1,3-diglycidyl imidazolium nitrate and 1,3-diglycidyl imidazolium acetate. The corrosion inhibiting epoxy resin paint may comprise at least one sparingly water-soluble salt, preferably a tribasic alkaline earth phosphate. Also disclosed is an article of metal coated in the corrosion inhibiting composition.