| 摘要 |
PURPOSE:To enable the continuous detection of a corrosion amount and a corrosion mode, by inserting a test piece having a reference echo setting groove provided in the vicinity of the bottom surface thereof in parallel to said bottom surface into a corrosive environment forming vessel, and measuring and recording the corrosion amount and corrosion mode of the test piece automatically and continuously. CONSTITUTION:The test piece 2, of which the lower end is put in a corrosive environment forming vessel 3, is contacted with a corrosive substance 5 and the corrosive environment thereof such as temp. is controlled by a control apparatus 8 and a reference echo setting groove 4 is provided to the test piece 2 in the vicinity of the bottom surface thereof in parallel to said bottom surface. Corrosion is generated to the lower end of the test piece 2 and the reflected wave of the ultrasonic wave from the ultrasonic wave transmitting and receiving transducer 1 attached to the upper end of said test piece 2 is caught and detected to display informations such as reflected echo sound pressure, the eneven state of the corroded surface or the reduction in a wall thickness and the timewise change thereof can be automatically recorded. |
