HYDROPHILIC FILM FOR METAL MATERIALS, HYDROPHILIZATION TREATMENT AGENT, AND HYDROPHILIZATION TREATMENT METHOD

摘要

A hydrophilic film is formed on the surface of a metal material, inhibits the growth of condensation water, and provides mold resistance, and a hydrophilization treatment agent is used for forming the hydrophilic film. The hydrophilization treatment agent has one or more compounds selected from poorly water-soluble cerium compounds (A); and a hydrophilic film prepared from the hydrophilization treatment agent. Preferably, the poorly water-soluble cerium compounds (A) are one or more compounds selected from cerium (III) carbonate, cerium (III) fluoride, cerium (IV) fluoride, and cerium (IV) oxide. By forming the hydrophilic film on the surface of a metal material, the growth of condensation water can be inhibited, and the mold resistance can be provided.