PURPOSE: To obtain a flaw detecting substance excellent in ultrasonic wave propagating and transmitting property and wettability easy to coat, capable of being easily washed off with water after testing and having no rust generating action, by using alkanolamine salt of aliphatic saturated branched dibasic carboxylic acid of which the number of C is within a specific range as a main component.
CONSTITUTION: A contact medium for ultrasonic flaw detection is prepared by using alkanolamine of 16W20C aliphatic saturated branched dibasic carboxylic acid represented by formula I or II as a main component and adding polyhydric water-soluble alcohol with an average M.W. of 600 or less, which is non-drying and exerts no adverse influence of the propagating and transmitting property of an ultrasonic wave, such as polyethylene glycol or dipropylene glycol. By this method, the contact medium having rust inhibiting action and good workability and capable of enhancing test accuracy is obtained. The rust inhibiting action thereof may be further enhanced by adding a small amount of a rust inhibitor such as benzotriazole.
| JPS5946852 | INSPECTION DEVICE OF ACOUSTIC RUBBER |
MATSUSHITA TSUTOMU
OKAMOTO SHIYUUICHI
KYOEI YUSHI KAGAKU KOGYO KK