| 摘要 |
The invention relates to a method for testing the impermeability of components ( 1 ) that contain cavities ( 7 ). On at least one side of the component ( 1 ) to be tested, at least the surface to be tested is completely wetted with a foam-producing testing liquid ( 11 ). The aim of the invention is to create a method that can be carried out as quickly and easily as possible, during which the component ( 1 ) to be tested is influenced as little as possible by the testing liquid ( 11 ). To this end, the component ( 1 ) is subjected to an increase in temperature, and the surface of the component ( 1 ) to be tested is subsequently examined with regard to the formation of bubbles ( 12 ) in the testing liquid ( 11 ). The testing liquid ( 11 ) preferably consists of 10 to 20% dissolved surfactants, 2 to 6% alcohol, and 75 to 78% water and a maximum of 5% auxiliary agents.
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