Patent ID: 7575644
Filing Date: 2009-08-18
Classification: C09D,C23C,Y10T

Abstract:
1. A solution for treating a surface of an iron material comprising components (a), (b), (c), (d), and (e): (a) zirconium fluoride; (b) ion of a rare earth element and/or a compound containing a rare earth element; (c) a polyallylamine; (d) aluminum ion; and (e) free fluorine ion, wherein zirconium in the component (a) is included at a weight concentration A of 10 to 1000 ppm, a ratio K of a weight concentration B of the rare earth element in the component (b) to the weight concentration A (K=B/A) is 0.1 to 30, the component (d) is included at a weight concentration D of 50 to 250 ppm, and the component (e) is included at a weight concentration E of 0.5 to 30 ppm.