INDUSTRIAL OIL EVALUATION METHOD, INDUSTRIAL OIL EVALUATION DEVICE, AND INDUSTRIAL OIL CIRCULATION DEVICE

Japanese Patent JP2017062214

A

PROBLEM TO BE SOLVED: To perform evaluation of hydraulic industrial oil, that is, deterioration determination at an early stage and simply, inexpensively, rapidly.SOLUTION: Acidic substance generated by deterioration of hydraulic oil is dissolved into water and the hydraulic oil in a normal state is dissolved into hexane to evaluate pH of hydrophilic acidic substance, that is, water layer 31 into which the acidic substance generated by deterioration caused by hydrolysis is dissolved. Deterioration of the hydraulic oil is determined by grasping concentration of the acidic substance existing in the hydraulic oil.SELECTED DRAWING: Figure 2

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SAKURAGI KIYOSHI
NISHIDA HIROYUKI

JP2015188795A

March 30, 2017

September 25, 2015

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CENTRAL RES INST ELECTRIC POWER IND

G01N33/30; G01N27/416

Hiroyuki Kurihara
Mountain Saki Yuichiro

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