| 摘要 |
PURPOSE:To permit production of Cr coated steel products having excellent adhesiveness and corrosion resistance by forming an Ni-Cr-Fe alloy layer contg. Ni at a specific ratio and coating of Cr or specific ratio of Cr and the balance Ni and Fe successively on the steel products. CONSTITUTION:The coated steel products are obtd. by forming the Ni-Cr-Fe alloy layer contg. >=30% Ni and the coating consisting of Cr or consisting of >=12% Cr and the balance Ni and Fe on the underlying steel products. The coated steel products can be formed by, for example, a vacuum deposition method. Ni, Cr and Fe materials are respectively housed into there crucible 2A-2C as vapor sources and the inside of a vacuum vessel 1 is maintained in a prescribed vacuum state. Vacuum deposition is executed while the underlying steel products 3 are kept heated to >=600 deg.C by a heater 4 or an electron gun 6 is used.
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