THICK FILM SHAPE INORGANIC ZINC-RICH COATING COMPOSITION

摘要

To provide a thick film shape inorganic zinc-rich coating composition capable of preventing foaming when a multilayered coated film is formed by further coating other coating on the resulting coated film regardless of presence/absence of a sealing treatment process.SOLUTION: There is provided a thick film shape inorganic zinc-rich coating composition forming a rust preventive coating film on a steel substrate, containing a zinc powder (A), an alkyl silicate compound (B), a solvent (C), and an organoboron compound (D), in which the solvent (C) contains a monohydric alcohol-based solvent having no substituent other than a hydroxyl group (c-1), and a monohydric alcohol-based solvent having a substituent with higher electron attractive property than that of a hydrogen atom in addition to the hydroxyl group (c-2), and a mass ratio of the solvent (c-1) and the solvent (c-2) is 87:13 to 50:50.SELECTED DRAWING: None