At the same time, we will use a sanding machine to grind the welding surface, which enhances the fatigue resistance of the metal, and the product is not easy to crack. We have different surface treatment production lines, the first one is powder coating. Each powder coating equipment can finish 10-20 tons per day. The powder coating is 100-300μm, the quality assurance is 5-10 years, and the second is galvanized surface treatment. Galvanized products are very durable and stable and can resist rust for 20 years.