(2) The quality control of the surface treatment before painting shall be based on the surface treatment requirements of the coated article, adopt a scientific and effective treatment method, thoroughly remove grease stain, rust and impurities on the surface of the coated article to ensure that the surface of the coated article is clean and dry. In particular, the surface of the object to be coated should have a certain roughness, which plays an important role in ensuring the coating quality of solvent-free epoxy coatings.
(3) After the final quality inspection coating construction process is completed, a comprehensive quality inspection of the coating quality shall be carried out according to the quality standards. Test the hardness, thickness, adhesion, surface state, gloss and other quality indicators. Found that the film has bubbles, cracks, wrinkles and shrinkage and other ills, should take effective remedial measures, otherwise it can not achieve the purpose of protection.
To ensure the practical quality of solvent-free epoxy coating products, you must be familiar with coating technology. Improper operation of the coating process can cause various morbidity or abnormalities of the coating film. There are a number of factors associated with the pathogenesis of the coating, and one pathology may be caused by several factors. The morbidity and reproducibility often found in practice are often inconsistent. In general, the causes of defects are related to paint, coating process, drying and curing, construction methods, surface conditions of the parts to be coated, coating equipment and environment, etc. The preventive measures should also be based on the main factors that cause ills.
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