Abstract: A black corrosion resistant coating composition which is applied to a metal substrate as a wet film and heated to dry and initiate curing to provide a protective coating tenaciously bonded to the substrate. The composition has a corrosion inhibiting powdered metal, a black pigment of manganese dioxide and a primary bonding titanate polymer which when heated, undergoes a hydrolysis reaction producing an inorganic titanium dioxide bonding of the coating to the substrate. Improved film integrity and adhesion of the wet coating prior to the hydrolysis reaction is provided by a secondary organic resin. Preferably the coating composition also has thixotropic, metal suspension and hygroscopic agents. All the constituents are dispersed in a vehicle of active and inactive solvents.

Abstract: A coating and method of protecting a metal substrate from corrosion by applying a thin film of a liquid composition on the substrate and heating the wet film to an elevated temperature for a period of time to dry or cure the film and thereby adhere a protective coating to the substrate without the maximum temperature of the substrate exceeding about 500.degree. F. and preferably 450.degree. F. The composition contains a primary corrosion inhibitor of powdered metal dispersed in a bonding material of linear epoxy or phenoxy resin and a vehicle of active and inactive organic solvents. Preferably, the composition also includes secondary corrosion inhibiting resins, a thioxotropic material, a hygroscopic material, a powdered metal suspension agent, and a material to neutralize the acidity of the linear epoxy or phenoxy resin.