Surface treatment is to form a covering layer on the product's surface to give the product an appearance and anti-corrosion effect. There are mainly the following standard surface treatment methods:
1. Electroplating
The electroplating process forms a thin metallic coating on the material and passes the positively charged electrical current through a solution containing dissolved metal ions and the negatively charged electrical current through the metallic part. This surface treatment is performed on copper, nickel, gold, silver, zinc, and tin. Sometimes, bluing, phosphating, passivation, etc. are also included.
2. Anodic Oxidation
anodized coating is applied to the surface of a metal object. This layer prevents corrosion and can improve the function and appearance of the object, as well as hardness, abrasion resistance, and increased adhesion.
3. Surface spraying
Surface spraying is spraying a liquid or powder onto a surface. This process can improve corrosion resistance and decorative properties.
4. Baked coating
Baked coating is sprayed or painted on aluminum or steel. The finish is always heated or baked to at least 150 degrees Fahrenheit.
5. Sandblasting
Sandblasting uses compressed air as a power source to form a high-speed jet beam to spray the material (copper ore sand, quartz sand, corundum, iron sand, sea sand) onto the object's surface, changing its surface or shape. Due to the impact and cutting operation of the abrasive on the surface of the object, the surface acquires a certain degree of cleanliness and different degrees of roughness, which improves the mechanical properties of the surface, thereby enhancing the durability of the object, increasing the adhesion between it and the coating, and also facilitating the leveling and decoration of the coating.
