Analysis of defect categories and causes in solvent-based inorganic zinc-rich coatings

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Analysis of defect categories and causes in solvent-based inorganic zinc-rich coatings 1. Rough spraying, excessive spraying, and dry spraying – There are many reasons why the paint surface becomes rough after spraying; these can be summarized as follows: 1) Poor pre-treatment of the substrate, resulting in high roughness, which prevents the paint from covering the surface properly; the roughness of the substrate is reflected on the paint surface； 2) The construction environment is not clean; dust and debris fall on the paint surface, causing roughness, or the ventilation in the construction area is poor, allowing paint mist to settle in the air and also resulting in roughness ； 3) No filtering measures were taken for the construction tools; the particulate impurities in the paint were not effectively filtered, resulting in a rough paint surface after spraying ； 4) The painting pressure is too high, resulting in excessive paint mist; the film-forming substance that reaches the surface of the substrate is discontinuous, leading to roughness ； 5) The solvent dries too quickly ； 6) The nozzle is too small ；