| 摘要 |
Disclosed is a method for rust-proofing a mold, which is capable of reducing the time and the cost required for rust-proofing the mold. A step (S1) for rust-proofing a mold (1) includes an iron hydroxide-forming step (S11) for forming iron hydroxide on a predetermined part of the surface of the mold (1), and a surface-treating step (S12) for forming a film covering the molding surface of the mold (1), and for changing the iron hydroxide formed on the mold (1) into black rust, by heating the mold (1), under an oxygen-deficiency atmosphere, on which the iron hydroxide is formed in the iron hydroxide-forming step (S11). |
