Patent ID: 11965247
Assignee: NIHON PARKERIZING CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A pretreatment agent, used as an agent in a pretreatment of a chemical conversion treatment performed for forming a chemical conversion coating on/over a surface of a metal material,
comprising:
a metal alkoxide (A) containing at least one metal element selected from the group consisting of zirconium, titanium, vanadium, and aluminum;
at least one sulfonic acid (B) selected from the group consisting of methanesulfonic acid, ethanesulfonic acid, hydroxymethanesulfonic acid, and hydroxyethanesulfonic acid, and
at least one alkoxysilyl group-containing organosilane compound (C), wherein,
when a metal-equivalent molar concentration of the metal alkoxide (A) is defined as AM and a molar concentration of the sulfonic acid contained in the pretreatment agent is defined at BM,
a molar concentration of [BM]/[AM] is 2.0 or higher.