HYDROPHILIZING AGENT FOR METALLIC MATERIAL, HYDROPHYDROPHILIZING AGENT FOR METALLIC MATERIAL, HYDROPHILIZING FLUID, METHOD OF HYDROPHILIZING, METALLICHILIZING FLUID, METHOD OF HYDROPHILIZING, METALLIC MATERIAL, AND HEAT EXCHANGER MATERIAL, AND HEAT EXCHANGER

摘要

A hydrophilizing composition which contains no chromium and imparts excellen t corrosion resistance and long-lasting hydrophilicity to a heat exchanger mad e of aluminum. The hydrophilizing agent for metallic materials comprises: (A) a hydrophilic polymer having at least one nonionic functional group selected from the group consisting of primary amide, secondary amide, tertiary amide, hydroxy, and polyoxyalkylene groups; (B) a hydrophilic polymer having at lea st one ionic functional group selected from the group consisting of sulfo, phosphonate, carboxyl, primary amino, secondary amino, tertiary amino, and quaternary ammonium groups; (C) a vanadium compound; and (D) a compound havi ng at least one element selected from the group consisting of Zr, Ti, and Si.