Abstract: Addressing the problem that at present lots of VOCs is produced,when using the solvent antirust coating in steel pipe manufacturing process,a water-based antirust coating suitable for steel pipes is developed.Studied in the paper are the degree of esterification of epoxy esters,the graft ratio of acrylates to epoxy esters,and the effect by the cross-linking agent on the performance of the resin.Also examined are the dispersion state and antirust performance of the resin.And accordingly the optimal resin composition process is determined.The study result shows that when A-172 is used as the cross-linking agent,the degree of the epoxy esterification is 80%,and the mass ratio of acrylate to epoxy ester grafting is 1 ∶1,the ambient one-component water-based acrylic modified-epoxy resin as prepared has both best storage stability and most satisfactory corrosion resistance.