Hydrophilic film for metal materials hydrophilization treatment agent and hydrophilization treatment method

摘要

[Problem] To provide a hydrophilic film that is formed on the surface of a metal material inhibits the growth of condensation water and provides mold resistance and a hydrophilization treatment agent for forming the hydrophilic film. [Solution] The aforementioned problem is solved by: a hydrophilization treatment agent containing one or more types of 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 mold resistance can be provided.