Spray/dip pre-treatment is a crucial process in surface preparation before applying coatings like paint or powder. It involves cleaning, conditioning, and converting the metal surface to ensure optimal adhesion and corrosion resistance of the subsequent coating.

The process consists of the stages of degreasing, removing rust and other contaminants, rinsing, applying a protective coating, and passivation. Both spray and dip methods differ in the application technique, with spray often used in mass production and dip used for more complex shapes.

Spray pre-treatment:

Chemicals are sprayed onto the workpiece using nozzles. Often used for high-volume production due to efficiency. Requires careful control of spray parameters for even coverage.

Dip pre-treatment:

Workpieces are immersed in chemical tanks. Suitable for complex shapes and large components. Can be slower than spray pre-treatment but ensures complete coverage.

Common Applications

• Automotive,
• Aerospace,
• Construction,
• Appliances,
• Metal furniture