ELECTRODEPOSITION FILM-FORMING LIQUID AND METHOD FOR FORMING ELECTRODEPOSITION FILM

摘要

PROBLEM TO BE SOLVED: To provide an electrodeposition film-forming liquid capable of stably forming an electrodeposition film of smooth surface at a low energy, and to provide a method for forming an electrodeposition film with slight hydrogen gas generation using the liquid. SOLUTION: This electrodeposition film-forming liquid comprises a polymer having acidic functional group, a basic compound and water; wherein the neutralization percentage of the polymer is characterized by being X to (X+30)% [X is the neutralization percentage of the polymer (neutralization percentage with solid phase formation) at 25 deg.C when the viscosity of the liquid becomes minimum], and it is preferable that the polymer contains at least one kind of copolymerizable component selected from acrylic acid-derived constituent and methacrylic acid-derived constituent and the acid value of the polymer is 100-160. The other objective method for forming an electrodeposition film is characterized by comprising forming the electrodeposition film on the surface of a conductive board using the electrodeposition film-forming liquid.