Chromated metal sheet having high corrosion resistance with improved lubricity and electric conductivity

A chromated metal sheet possessing the combined properties of high corrosion resistance, improved lubricity and improved electrical conductivity, comprising:

• a metal substrate,
• a chromate layer adhered to said metal substrate,
• said chromate layer comprising a chromium deposit in the range of 10-200 mg/m.sup.2 expressed as metallic Cr,
• a plurality of silica particles dispersed throughout said chromate layer in a weight ratio of 0.1-6.0 parts by weight of SiO.sub.2 per unit weight of Cr;
• a plurality of lubricating particles dispersed throughout said chromate layer, said lubricating particles being selected from the group consisting of graphite, MoS.sub.2, BN, calcium stearate and an organic lubricating substance, said lubricating particles being present in a weight ratio of 0.1-100 per unit weight of Cr,
• wherein said lubricating particles are dispersed on the surface of said metal substrate with a coverage of less than 50%;
• and
• wherein said lubricating particles have a surface layer nonionic surfactant positioned on each of said lubricating particles, said surfactant having nonionic surface activating action and being present in an amount of about 1%-70% by weight of the weight of said lubricating particles, said lubricating particles being present in a weight ratio of 0.1-100 to the weight of Cr.