| 摘要 |
<P>PROBLEM TO BE SOLVED: To certainly impart a high rustproof effect to a metal base material over a long period of time even if a rustproof coating film is formed using a chromium-free rustproof agent. <P>SOLUTION: The rustproof coating film, which is constituted of an inorganic composition containing a metal powder and substantially containing no chromium, is formed on the rustproof substrate layer on the surface of the metal base material treated with a rustproof substrate agent to prepare a rustproof coated article. The rustproof substrate layer may be a metal phosphate coating film such as an iron phosphate coating film. The corrosion potential of the rustproof coating film may be -1,100 to -800 mV (especially about -1,100 to -900 mV) and the inorganic compound may contain at least a plate zinc powder (e.g., the plate zinc powder and a binder component, especially the plate zinc powder, a plate aluminum powder and the binder component). The rustproof coating film may be constituted of a plurality of films and may has a structure that a plate metal powder is laminated. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
