| abstract |
The present invention provides a surface treatment agent which can improve the adhesion of a surface of a metal material to a layer containing a resin and which imparts excellent corrosion resistance, and a surface treatment method. A surface treatment agent for treating a surface of a metal material, comprising: an acrylic resin containing a carboxyl group and a hydroxyl group, a compound containing an oxazoline group, and metal particles, and the metal particles are selected from the group consisting of A particle of at least one metal in the group consisting of Nb, Ca, and Nd. Further, the metal particles are preferably cerium oxide sols. |