Abstract: An improvement in a weldable coating for metallic substrates containing a high molecular weight epoxy or phenoxy resin, an electroconductive pigment such as zinc and a diluent such as a glycol ether wherein the improvement resides in replacing at least about 70 weight percent of said resin with a composition containing a low molecular weight epoxy resin such as the diglycidyl ether of bisphenol A, a phenolic hydroxyl-containing compound such as a phenolic hydroxyl terminated adduct of a diglycidyl ether of a diphenolic compound such as bisphenol A and a catalyst for effecting the reaction between the epoxy resin and the adduct.

Abstract: An improvement in a process for applying a weldable coating to a metallic substrate which process comprises applying to said substrate having a clean surface(I) a first coating containing a hexavalent chromium component and/or a phosphate component and an electroconductive pigment and thereafter curing said coating and(II) applying over said cured first coating a second coating which is a weldable coating containing a high molecular weight epoxy or phenoxy resin, a diluent and an electroconductive pigment and subsequently curing same;The improvement residing in replacing at least 70 weight percent of said high molecular weight epoxy or phenoxy resin in said second coating with a coating composition comprising(A) a low molecular weight epoxy resin or mixtures thereof having an average of more than one vicinal epoxy group per molecule,(B) a hydroxyl-containing or thiol-containing material or mixture of such materials which is (1) a polyhydric phenolic or thiophenolic compound or (2) the product of reacting (a)