How to Test the Coating Plant for Steel Pipe
Coating film appearance of the coating plant for steel pipe should meet the requirements as follows:
Do not allow the defects such as pinhole, air bubble, crack, lifting, bleeding, misses, sagging, partial desquamation exist in the primer, lacquer coat, paint film of the coating plant for the steel pipe. The surface of the paint firm should be uniform and with the accordant tinct. People can test the coating via naked eye or magnifying glass.
Thickness test of the coating plant for steel pipe should be done after the desiccative of each coating. Test the whole thickness after all the coatings. People can use the paint film thickness gauge to test the thickness of the coating.
Evaluation of the resistance of the coating from substrate can be used to test the quality of the coating plant for steel pipe. Choose six trial panels with the 200mm×200mm specification. Then wipe the coating as same as the coating plant for steel pipe after the surface preparation for the six trial panels.
Do not allow the defects such as pinhole, air bubble, crack, lifting, bleeding, misses, sagging, partial desquamation exist in the primer, lacquer coat, paint film of the coating plant for the steel pipe. The surface of the paint firm should be uniform and with the accordant tinct. People can test the coating via naked eye or magnifying glass.
Thickness test of the coating plant for steel pipe should be done after the desiccative of each coating. Test the whole thickness after all the coatings. People can use the paint film thickness gauge to test the thickness of the coating.
Evaluation of the resistance of the coating from substrate can be used to test the quality of the coating plant for steel pipe. Choose six trial panels with the 200mm×200mm specification. Then wipe the coating as same as the coating plant for steel pipe after the surface preparation for the six trial panels.
