| 摘要 |
This chemical conversion treatment agent for surface treatment of a metal substrate contains a co-condensate of a silane coupling agent (A), a silane coupling agent (B), the element fluorine, and at least one metal element selected from a group consisting of zirconium, titanium and hafnium. The silane coupling agent (A) has a tri- or di-alkoxysilane group and an amino group, and the silane coupling agent (B) is represented by general formula (1) [in the formula, R represents an alkylene group of 1-5 carbon atoms; Z represents a cyclohexyl group optionally having an epoxy group; a, b, and c are integers 0-3 fulfilling the conditions that the sum of a, b and c is 3 and the sum of a and b is 2-3; and x is an integer 1-3.]. |
