テーバ式摩耗試験機によるアルミニウム陽極酸化皮膜の試験方法に関する一実験

Abstract

The authors intended to conduct the abrasion tests of anodic oxide films on aluminum by a Taber Abraser. However, the abrasive wheels manufactured by Taber Instrument Corp. (such as CS-17) give small wear loss of test pieces and need long times in abrasion measurements. Moreover, their prices are high due to imports, and their consumptions are remarkable.In this study, the authors selected some commercial grindstones as substitutes of CS-17 wheels and made experiments to determine whether they were actually available for substitutes of CS-17 wheels.It was also investigated whether the wear properties of hard anodic oxide films can fully be derived from the abrasion tests in deionized water.The results obtained were as follows:1) It was found that some commercial grindstones such as WA 120K, PVA c 120-10M, and PVA C 1204W were suitable for the abrasive wheels combined with the Taber Abraser as substitutes of CS-17 wheels.2) The abrasion resistance tests on the surfaces of films showed that there were little differences in the early stage of abrasion between the films formed at 15 and-5°C.Whereas, in the abrasions on the metal-oxide interfaces, the films formed at a lower bath temperature were proved to give higher abrasion resistances.3) The abrasion tests by WA grindstones were conducted in deionized water and the results of good reproducibility were obtained.4) It was clearly explained that sliding ratio (S) was a certain degree of criterion for abrasion resistance.5) It was also found possible to determine the abrasion loss by observation of the decrease in film thickness by means of a high frequency thickness meter, because the trail of abrasion was uniform and the initial weight loss was great in these tests by wet process.