When it comes to using a sprayer, especially for iron shelves and steel structures, proper surface preparation is crucial. But do you know the key technical details involved in this process? Let’s take a closer look at best practices to ensure long-lasting results. First and foremost, surface preparation begins with thorough grinding to remove rust, oxides, and other contaminants. This step is essential for ensuring proper adhesion of the coating. According to the GB8923 standard, the surface should reach a minimum Sa2.5 grade, which means it must be cleaned to a near-white metal finish. The surface roughness should also be maintained between 35-75 micrometers after sanding, and all dust should be carefully removed before proceeding. Next, it's important to apply the first coat of paint within four hours after the steel has been properly ground and prepared. This helps prevent re-rusting or contamination. For the primer, experts often recommend using ET-98 inorganic phosphate zinc-rich paint, which offers excellent corrosion resistance. Before applying, make sure the surface is degreased and free from rust using tools like wire brushes, sanders, or abrasive paper. If you're working with welded parts, avoid painting for at least 72 hours after welding. This allows the weld to cool and stabilize, reducing the risk of cracking or poor adhesion. Also, when dealing with galvanized surfaces, use a light brushing method to remove any dust, oil, or debris. After that, applying a layer of 70-H epoxy iron red anti-corrosive paint can further enhance protection against corrosion over time. By following these guidelines, you not only improve the durability of the coating but also ensure a safer and more efficient application process. Always remember that proper surface preparation is the foundation of any successful painting project, especially when dealing with steel structures and industrial equipment. Stump Grinder Teeth,Tree Stump Grinder Cutter,Stump Grinder Tooth Replacement,Tree Stump Grinder Crusher Blades Zhenjiang Weir Machinery Technology Co., Ltd , https://www.weircuttingpicks.com