Abstract: Metal surfaces moving at high speeds are coated with a chromium-resin containing layer having improved adhesion and resistance to deformation. The coatings provide corrosion resistance to the metal as well as enhancing its appearance when a pigment is added. The improved metal coatings are obtained by processes which apply an aqueous dispersion containing a water soluble dichromate of a metal, a reducing agent for the dichromate consisting of a mixture of a lower alkanolamine and a hexitol, and an acrylic resin mixture consisting of about 5 to 22% by weight of thermosetting acrylic tetrapolymer and 95 to 78% by weight of thermoplastic acrylic copolymer to the metal surface and thereafter heating the metal to evaporate water and form a coating on the metal at a temperature ranging from about 180.degree. to 275.degree. F. and then curing the coating while simultaneously reducing the chromium in the dichromate by heating the metal within the range of about 400.degree. to 500.degree. F. for at least 2 seconds.

Abstract: Pigmented, in situ reduced zinc dichromate coatings on asbestos-cement and similar surfaces are made more reproducible in color by including as at least a portion of the reducing agent a hexitol or pentitol such as sorbitol, or a low alkanolamine, or mixtures of these. An acid like phosphoric acid that forms a water-insoluble calcium salt but does not precipitate the zinc can also be added to the coating formulation.