Description of coating construction process
Release time:
Feb 14,2025
1. Hot-rolled type material
Hot-rolled materials such as 18 # channel steel, 120 * 120 square tube, angle steel typically exhibit a thick oxide layer on their surfaces. Following the preprocessing of these materials, the first step is sandblasting to remove this oxide skin. Subsequently, degreasing and phosphating are performed. After drying, shielding protection is applied to the welding positions before finally spraying with an epoxy zinc-rich primer.
The coated materials will then be transported to the welding workshop for further use.
2. Treatment before spraying
Initially, we polish the entire compartment to eliminate any welding slag, burrs, or other defects resulting from welding. Next, abrasive paper is employed to clean rust from its surface in order to enhance coating adhesion. Following this step, a cleaning agent is used to thoroughly cleanse the compartment body and remove any residual oil stains present on its surface. Finally, we apply heat to evaporate moisture from the compartment.
Once prepared, it will be sent to a paint spray room for application.
3. Spraying
The entire compartment body shall receive an epoxy zinc-rich primer spray treatment. After spraying is complete, it will be transferred to a baking room for heating and drying processes. Once cooled down, polishing of the primer coating will take place along with sealing at designated locations using adhesive material. The next step involves applying micaceous iron oxide intermediate paint before sending it back into a baking chamber for additional heating and drying procedures. Upon cooling again after this stage of painting has been completed; polishing of the intermediate paint ensures optimal smoothness of the surface finish prior to applying PVDF finish paint.
4. Anticorrosion spraying of chasis
After completing all necessary welds on the chassis component; polishing occurs once more in order to eradicate impurities and oil stains from its surface followed by sequential applications: first with epoxy zinc-rich primer; then micaceous iron oxide intermediate paint; concluding with heavy anti-corrosion asphalt paint.
