潤滑油汚染物質の色相判別法

概要

論文の詳細を見る
Contaminants in hydraulic and lubricating oils are harmful to lubrication. There are two types of oil cleanliness standards; one is based on particle count like NAS 1638,ISO 4406, SAE AS4059 and JIS B9930,the other on gravimetric analysis like ASTM D4898 and JIS B9931.The particle Count method can tell us the number of particles in certain size ranges and the gravimetric method the gross weight of contaminant in a certain quantity. But they cannot tell us what exactly the contaminants are. When oil is used in machines for a long time, it will be oxidized. As oil oxidation products are of molecular size, it is difficult to examine them by the particle count method. The authors have investigated the color of contaminants collectrd on membrane filters by a colorimetric device and found that the color of the contaminants collected on membrane filters by a colorimetric device and found that the color of the contaminants in used oil shows certain characteristics
福井大学工学部の論文