Metal finishing process and composition therefor

Claim 1

A PROCESS FOR TREATING METAL WHICH COMPRISES CONTACTING SAID METAL IN AN AQUEOUS SOLUTION CONTAINING FROM ABOUT 1 TO 75% BY WEIGHT OF AN INORGANIC OXYACID SELECTED FROM SULPHURIC, SULPHAMIC, BORIC PHOSPHORIC, NITRIC AND MIXTURES THEREOF AND FROM ABOUT 1 JTO 50% BY WEIGHT OF A WATER-SOLUBLE RESIN-FORMING MATERIAL SELECTED FROM THE GROUP CONSISTING OF AMINE-ALDEHYDE, POLYAMINE-POLYCARBOXYLIC ACID, POLYHYDRIC ALCOHOL-POLYCARBOXYLIC ACID AND COPOLYMERS THEREOF PARTIALLY POLYMERIZED BY HEATING IN AQUEOUS SOLUTION IN THE PRESENCE OF SAID OXYACID AND CAPABLE OF FORMING A SUBSTANTIALLY WATER-INSOLUBLE RESINOUS FILM UPON THE METAL SURFACE, SAID AQUEOUS SOLUTION BEING CAPABLE OF REACTING AT TEMPERATURES BELOW 212*F. WITH THE METAL TO BE TREATED, CONTACTING OF SAID METAL BEING CARRIED OUT AT A TEMPERATURE BELOW 212*F. FOR A TIME SUFFICIENT TO EFFECT REACTION BETWEEN SAID AQUEOUS SOLUTION AND METAL TO FORM A REACTION PRODUCT AND TO CAUSE AN INTERACTION OF SAID REACTION PRODUCT WITH SAID WATER-SOLUBLE RESIN-FORING MATERIAL TO THEREBY DEPOSIT A WATER-INSOLUBLE RESINOUS FILM ON THE METAL SURFACE, REACTING A SECOND REACTABLE ORGANIC MATERIAL WITH THE RESINOUS FILM ON SAID METAL SURFACE TO MODIFY THE NATURE OF SAID FILM AND FINALLY DRYING SAID TREATED METAL.