Surface treated metal material and surface treating agent
AssigneeNippon Steel Corporation
InventorsHiromasa Shoji, Masao Sakashita, Tadashi Sakon, Kenichiro Tadokoro, Yoshihiro Kaneda
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Abstract
Surface treated metal materials with corrosion-resistant coating layers composed mainly of oxyacid compounds of rare earth elements (lanthanum, cerium, etc.) or Group IVA elements (zirconium, etc.), oxyacids or mixtures thereof. The corrosion resistant coating layers may also contain resins. Also provided are corrosion resistant coating layers containing rare earth element and Group IVA element compounds in resin matrixes. The corrosion resistant coating layers, particularly inorganic layers, may be covered with resin layers.
Claims54
A surface treated metal material having a corrosion resistant coating layer consisting essentially of an oxyacid compound or hydrogen oxyacid compound of a rare earth element or group IVA element, or a mixture thereof, on the surface of a metal material.
A surface treated metal material having a corrosion resistant coating layer consisting essentially of an oxyacid compound or hydrogen oxyacid compound of a rare earth element or group IVA element, or a mixture thereof, and a resin, on the surface of a metal material.
A surface treated metal material having a film comprising a compound of a rare earth metal element or a group IVA element, or a mixture thereof dispersed in a resin matrix, on the surface of a metal material.
A surface treated metal material having a film consisting essentially of a rare earth metal element or group IVA element compound, or a mixture thereof coating the surface of a metal sheet as a first layer, the surface of which is in turn coated with a film consisting essentially of a resin as a second layer.
A surface treated metal material having a film containing a rare earth metal element or group IVA element compound, or a mixture thereof dispersed in a resin matrix coating the surface of a metal material as a first layer, and having a film consisting essentially of a resin coating the first layer as a second layer.
A surface treatment agent for forming a corrosion resistant coating layer on the surface of a metal material consisting essentially of an oxyacid compound or hydrogen oxyacid compound of a rare earth element or group IVA element, or a mixture thereof.
A surface treatment agent which contains 0.05-4 mol/kg of a rare earth compound in terms of the rare earth element, and 0.5-100 moles of a phosphate compound and/or hydrogen phosphate compound in terms of H3PO4 to one mole of the rare earth element.
Dependencies are inferred from the claim text.