Weldable black steel sheet with low-gloss appearance

A weldable black steel sheet with low gloss appearance comprising a steel sheet plated with zinc or a zinc alloy, and carrying a chromate film formed on a surface of said plated sheet and having a coating weight of 1 to 200 mg/m.sup.2 in terms of metallic chromium, and a black film formed on at least said chromate film on one side of said sheet from a composition comprising 100 parts by weight of a thermosetting base resin, 1 to 200 parts by weight of a black dye, 1 to 150parts by weight of organic resin particles and 1 to 100parts by weight of fine inorganic particles, said base resin and said dye being soluble in an organic solvent, said black film having a thickness of 0.3 to 5.0 microns.

A weldable black steel sheet with low gloss appearance comprising a steel sheet plated with zinc or a zinc alloy, and carrying a chromate film formed on a surface of said plated sheet and having a coating weight of 1 to 200 mg/m.sup.2 in terms of metallic chromium, and a black film formed on at least said chromate film on one side of said sheet from a composition comprising 100 parts by weight of a thermosetting base resin, 1 to 200 parts by weight of a black dye, 1 to 150 parts by weight of organic resin particles and 1 to 100 parts by weight of a solid lubricant, said base resin and said dye being soluble in an organic solvent, said black film having a thickness of 0.3 to 5.0 microns.

A weldable black steel sheet with low gloss appearance comprising a steel sheet plated with zinc or a zinc alloy, and carrying a chromate film formed on a surface of said plated sheet and having a coating weight of 1 to 200 mg/m.sup.2 in terms of metallic chromium, and a black film formed on at least said chromate film on one side of said sheet from a composition comprising 100 parts by weight of a thermosetting base resin, 1 to 200 parts by weight of a black dye, 1 to 150 parts by weight of organic resin particles, 1 to 100 parts by weight of fine inorganic particles and i to 1 00 parts by weight of a solid lubricant, said base resin and said dye being soluble in an organic solvent, said black film having a thickness of 0.3 to 5.0 microns.

A weldable black steel sheet with low gloss appearance comprising a steel sheet plated with zinc or a zinc alloy, and carrying a chromate film formed on a surface of said plated sheet and having a coating weight of 1 to 200 mg/m.sup.2 in terms of metallic chromium, and a black film formed on at least said chromate film on one side of said sheet from a composition comprising 100 parts by weight of a thermosetting base resin, 1 to 200 parts by weight of a black dye and 10 to 150 parts by weight of organic resin particles having an average diameter of 2 to 25 microns, said base resin and said dye being soluble in an organic solvent, said black film having a thickness of 0.3 to 5.0 microns.

A weldable black steel sheet with low gloss appearance comprising a steel sheet plated with zinc or a zinc alloy, and carrying a chromate film formed on a surface of said plated sheet and having a coating weight of 1 to 200 mg/m.sup.2 in terms of metallic chromium, and a black film formed on at least said chromate film on one side of said sheet from a composition comprising 100 parts by weight of a thermosetting base resin, 1 to 200 parts by weight of a black dye, 10 to 150 parts by weight of organic resin particles having an average diameter of 2 to 25 microns and 1 to 30 parts by weight of silica such as a precipitated type or a gel type, obtained by the reaction of sodium silicate and mineral acids, said base resin and said dye being soluble in an organic solvent, said black film having a thickness of 0.3 to 5.0 microns.

A weldable black steel sheet with low gloss appearance comprising a steel sheet plated with zinc or a zinc alloy, and carrying a chromate film formed on a surface of said plated sheet and having a coating weight of 1 to 200 mg/m.sup.2 in terms of metallic chromium, and a black film formed on at least said chromate film on one side of said sheet from a composition comprising 100 parts by weight of a thermosetting base resin, 1 to 200 parts by weight of a black dye, 10 to 150 parts by weight of organic resin particles having an average diameter of 2 to 25 microns and 1 to 40 parts by weight of particles of a fluorine compound, said base resin and said dye being soluble in an organic solvent, said black film having a thickness of 0.3 to 5.0 microns.

A weldable black steel sheet with low gloss appearance comprising a steel sheet plated with zinc or a zinc alloy, and carrying a chromate film formed on a surface of said plated sheet and having a coating weight of 1 to 200 mg/m.sup.2 in terms of metallic chromium, and a black film formed on at least said chromate film on one side of said sheet from a composition comprising 100 parts by weight of a thermosetting base resin, 1 to 200 parts by weight of a black dye, 10 to 150 parts by weight of organic resin particles having an average diameter of 2 to 25 microns, 1 to 30 parts by weight of silica such as a precipitated type or gel type, obtained by the reaction of sodium silicate and mineral acids, and 1 to 40 parts by weight of particles of a fluorine compound, said base resin and said dye being soluble in an organic solvent, said black film having a thickness of 0.3 to 5.0 microns.