1 results about "Nickel free" patented technology

A method for treating the surface of a metallic material (210). The method comprises an anodizing step (104), in which a metal oxide layer (220) is formed on the surface of the metallic material. The method comprises a sealing step (112) comprising reacting the metallic material (210) with a first nickel free solution to form a sealing layer (240) at a temperature of at least 15 degrees Celsius for at least 3 minutes. The first nickel free solution comprises an aqueous solution containing at least one of a lithium ion compound, a sodium ion compound, a potassium ion compound, and an ammonium ion compound. The method comprises a coating step (118) comprising applying a second nickel free solution to the sealing layer (240) at a temperature of at least 85 degrees Celsius for at least 10 minutes to form a coating (250). The second nickel free solution comprises an aqueous solution containing at least one of a lithium ion compound, a sodium ion compound, a potassium ion compound, and an ammonium ion compound.