Wisest can body.

摘要

A welded can body formed by mash-seam electric resistance welding the lapped portion (10) which has been formed by overlapping the opposite marginal portions (9) of a blank of a tinfree steel formed with a baked lacquer film (17, 18) except the marginal portions, is provided. The metallic chrome layer of the tinfree steel is 40 to 130 mg/m2 thick, and substantially non-porous with the passivation current of 15 mA/cm2 or less. The chrome hydrated oxide layer thereof is 3 to 20 mg/m2 in terms of metallic chrome, and the ratio of the number of sulfur atoms to the number of chrome atoms in the chrome hydrated oxide layer is 0.05 or less.