Hydrophilic treatment agent, hydrophilic treatment liquid, hydrophilic treatment method, metallic material and heat exchanger of metallic material

摘要

A (a) first amide group, a second amide group, a third amide group, a hydroxyl group and a polyoxyalkylene as hydrophilic treatment compositions that contain chromium in the aluminum heat exchanger and maintain excellent corrosion resistance and long term hydrophilicity A group consisting of a hydrophilic polymer having at least one nonionic functional group selected from a group consisting of a group, (b) a sulfonic acid group, a phosphonate group, a carboxyl group, a first amino group, a second amino group, a third amino group, and a fourth ammonium group A hydrophilic treatment agent of a metal material containing a hydrophilic polymer having at least one ionic functional group selected from the group consisting of a (c) vanadium compound and at least one element selected from the group consisting of (d) Zr, Ti and Si is provided.