To provide a non-chromium coating material composition forming a coating film excellent in not only corrosion resistance of a general part of a coated metal plate but also corrosion resistance of a machined part or an end surface thereof.
The coating material composition with excellent corrosion resistance includes a hydroxyl group-containing coating film-forming resin (A), a cross-linking agent (B) and a rust-preventive pigment mixture (C), wherein based on 100 parts by mass of the total solid components of the resin (A) and the cross-linking agent (B), the rust-preventive pigment mixture (C) contains 3-50 parts by mass of a vanadium compound (1), (2) 3-50 parts by mass of silica fine particles subjected to calcium ion exchange, (3) 3-50 parts by mass of a phosphoric metal salt, and the quantity of the rust-preventive pigment mixture (C) is 10-150 parts by mass.
SAKAMOTO AKIHISA
HORIIE NAOKI
MASUDA HIDEKI
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