To provide a method and its apparatus which measure the impact resistance of the strength of a coating film at a low temperature.
In the test method for the impact resistance of the strength of a coating film at a low temperature, a coating-film test object in which a member is coated with a coating film to be tested is immersed in a cooling liquid 88 so as to be cooled down to a prescribed temperature. Then, by a pulling-up means 64 which makes sue of the elastic force of an elastic body, the cooled coating-film test object is pulled up quickly from the cooling liquid, the coating-film test object is moved along a route 20 which draws an approximate arc so as to be positioned in an impact position 18. Immediately after the coating-film test object has been positioned in the impact position, an arm 46 at a pendulum-type impact device 14 is turned freely by gravity around the rotation center 44, an impact element 48 at the tip of the arm is made to collide with the coating film, to be tested, at the coating-film test object, and whether a break or an exfoliation is generated on the face of the coating film to be tested is investigated.
SASANO KATSUJI
NONAMI OSAMU
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