| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for measuring quickly and highly precisely the thickness of the oxide film of 10-100 nm thick formed on the zinc base plated sheet iron, and to evaluates the press formability of the plated sheet iron from the measured thickness of the oxide film. SOLUTION: A film thickness measurement method for the oxide film formed on the surface layer of the zinc base plated steel iron for eliminating the effect of the secondary ray of the L ray of the zinc, is as follows: the surface of the zinc base plated steel iron is irradiated with the electron beam accelerated to 3-6 kV by using the scanning type electron microscope provided with electron beam micro-analyzer or wavelength dispersive X-ray detector, the intensity of Kαray of the oxygen generated thereby is measured by a detector and its subsequent pulse height analyzer. COPYRIGHT: (C)2006,JPO&NCIPI
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