摘要 |
PROBLEM TO BE SOLVED: To accurately evaluate an appearance of a surface of an alminum alloy. SOLUTION: After an advance direction dimension l1 of longest surface rust 2 in the advance direction in the surface rust 2 generated in a setting range P on the treated surface of the alminum alloy 1 and width direction dimensions w1, w2, w3 perpendicular to the advance direction in all the surface rust 2 are measured, a sum W of the width direction dimensions w1, w2, w3 of all the surface rust 2 and the advance direction dimension l1 of the longest surface rust 2 in the advance direction are multiplied, an appearance surface rust index N is calculated, and the state of the surface rust 2 in the setting range P is evaluated, based on the appearance surface rust index N. COPYRIGHT: (C)2005,JPO&NCIPI
|