M00001320
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ISO 2746 3rd Edition, October 1, 2015 Vitreous and porcelain enamels - High voltage test
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Availability date: 07/13/2021
Description / Abstract:
This International Standard describes two test methods of high
voltage testing:
— Test A is used to detect and locate defects in vitreous and
porcelain enamels;
— Test B is used to detect and locate defects and weak spots in
vitreous and porcelain enamels.
The tests are performed using DC or pulsed DC high voltage.
The tests are applicable to dry surfaces of enamel coatings. In
the case of moist surfaces, care should be taken to ensure that the
locating of any defects is correctly performed.
Since test voltages depend on the coating thickness, the test
method, especially with test A, may not be suitable for test
specimens for which the coating thickness varies to a large
extent.