Patent ID: 8034456

Claim:
A surface-treated metal material having a film formed on at least a portion of a surface of a metal material, the film containing at least polyurethane resin and silicon oxide, wherein the polyurethane resin contains one or more of siloxane bond, dehydration-condensation bond of silanol group and different functional group, and silanol moiety, and urea bond, wherein the sum of the siloxane bond, the dehydration-condensation bond of silanol group and different functional group, total amount of the silanol moiety, and the silicon oxide falls within a range for solids of the film as expressed by the following equation, 1.6 wt %≦(( Wa+Wb+Wc+Wd )/ W )×100≦25 wt % where, W is total weight of solids of the film, Wa is weight of silicon forming the siloxane bond (—Si—O—Si—), Wb is weight of silicon forming the dehydration-condensation bond (—Si—O—R—; R is any element other than Si), Wc is weight of silicon forming the silanol moiety (—Si—OH), and Wd is weight of silicon forming silicon oxide, and wherein the ratio of the total amount of urea bond and the urethane bond to the total amount of resin components falls within a range as expressed by the following equation, 0.1 wt %≦(( Ta+Tb )/ T )×100≦10 wt % where, T is weight of resin components in solids of the film, Ta is weight of nitrogen forming urea bond (—NH—CO—NH—), and Tb is weight of nitrogen forming urethane bond (—NH—CO—O—).