The shelves shall be painted. This kind of spraying treatment, also known as electrostatic powder spraying treatment. That is to say, after the pre-treatment, the powder is uniformly adhered to the metal surface by electrostatic adsorption of powder coating on the metal surface, and then the powder is melted and baked hard by high temperature to form a coating film, which insulates the metal from air contact, prevents oxidation and achieves the function of rust prevention. Moreover, this kind of powder has various colors, the effect of spraying is bright and beautiful, beautiful and smooth, which is the most widely used antirust technology in metal surface treatment. Spray treatment has many advantages.
1. The rust proof effect is good. If enough work and cost are done, the whole process flow is completed, and the metal surface of the shelf is treated with this spray, the service life can be as long as eight years and ten years. Of course, some cheap shelves are dried and sprayed directly after acid washing and decontamination. In this way, we only focus on the treatment first. Although we can save costs, they start to rust after three years of use.
2. Wear resistance, with this spray treatment, the hardness (wear resistance) reaches 2h in gb6739-86 standard.
3. Color diversity, you can choose dozens of general standard conventional colors. Shelves display shelves because of the choice of color, it is more gorgeous. The disadvantage is that it can't be directly exposed to the sun. When it is used in the water drenching and heat drying ring mirror, the surface coating is easy to age and change color, which leads to rust. Generally, it is only suitable for indoor use, and it should not be exposed to the sun as much as possible. After acid cleaning, degreasing, degreasing and phosphating, the surface treatment of the shelf adopts the electrostatic spraying process of thermosetting epoxy resin powder, which can meet the following technical requirements:
1. The film thickness is greater than 60um, the hardness is 2h, and its quality is in accordance with gb9286 standard. 2. The adhesion reaches level 1 of gb92865-88. 3. For the thermosetting epoxy polyester powder coating, the coating process requires to work on the coating line to ensure that the coating surface is full and smooth without obvious color difference, orange peel, etc. 4. Corrosion resistance (salt spray test) gb1771-91 > 500 hours. 5. The hardness (wear resistance) shall reach 2h in gb6739-86 standard. 6. The bending test is qualified under the condition of 2mm, and the impact resistance is greater than 400N / cm. Henggu shelf, quality assurance, export quality.