| abstract |
Compound to the art that the ion species cation containing the metal X 1 in an aqueous solution containing metal X 1 X, and comprises a compound Y containing the art metal Y 1 is the ion species anion containing the metal Y 1 in an aqueous solution, The total amount of compound X is 0.01-10 mass%, the total amount of compound Y is 0.01-10 mass%, the molar ratio of metal X 1 in a cation and metal Y 1 in an anion is 0.1-5, and metal X 1 is Ti, Zr, and Al. is at least one selected from the group consisting of metal Y 1 is is one or more selected from the group consisting of Ti, Zr, Si, B and Al, which does not contain an organic resin to substantially, inorganic chromium - a free metal surface treatment agent . |