Discuss the causes of defects in the application of inorganic zinc-rich primers

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1. Coating material factors: Inorganic zinc-rich primers are composed of various raw materials such as film-forming substances, solvents, and additives, whose properties work together in a complementary manner. Defects can occur due to various factors, such as improper storage conditions or excessive storage time. Another example includes unreasonable formula design, inappropriate selection of raw materials, and problems with the manufacturing process. 2. Painting process factors: When the factors related to inorganic zinc-rich primers and the substrate can be controlled and eliminated, defects usually arise from unreasonable painting design or inadequate implementation. The painting process here includes the specific steps involved in painting, the methods used with various tools, and especially whether processes such as drying and sanding are carried out properly. 3. Painting environment factors: Painting steel requires a favorable environment; insufficient lighting in the workshop leads to uneven spraying, and issues that could have been detected promptly go unnoticed. The humidity in the spraying and drying area is not under control, ventilation is inadequate, or the wind speed is inappropriate, which makes it difficult for solvents to evaporate and results in paint mist emissions. 4. Factors related to coating technology: The application of inorganic zinc-rich primers is carried out by operators, while the coating process is designed and managed by technical personnel. If the competence of engineering and technical staff is poor, it becomes difficult to ensure the proper execution of the coating process and to prevent defects from occurring. All the aforementioned problems must be resolved through human factors.