Spray/ Dip Treatment
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.
-
Both spray and dip pre-treatment involve similar stages but differ in application methods.
Typical stages include:
Degreasing: Removing oils, grease, and other contaminants from the surface.
Alkaline cleaning: Removing rust, scale, and other inorganic matter.
Rinsing: Removing chemicals from the previous stage.
Conversion coating: Forming a protective layer on the metal surface to improve adhesion.
Passivation: Sealing the conversion coating to prevent further oxidation.
-
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.
-
Workpieces are immersed in chemical tanks. Suitable for complex shapes and large components. Can be slower than spray pre-treatment but ensures complete coverage.
-
Automotive
Trucks and Buses
Aerospace
Construction
White Goods
General Engineering
We are here to assist you in selecting the optimal spray or dip pre-treatment solution for your specific needs.
Contact us today to discuss your project requirements and receive a customised quote.
Frequently Asked Questions
Everything you need to know about our industrial spray and dip pre-treatment systems, plant configurations, and custom engineering.
Spray pre-treatment applies cleaning and conversion chemicals through precision nozzles and is well suited to high-volume production. Dip pre-treatment immerses components in chemical tanks, making it effective for complex shapes, large parts, and areas that are difficult to reach with spray.
The best system depends on the material, component size and shape, production volume, coating type, required corrosion resistance, available floor space, and process chemistry. Leo Surface Coatings can assess these requirements and recommend a suitable spray, dip, or combined system.
A typical line may include degreasing, alkaline cleaning, rinsing, conversion coating, passivation, and drying. The exact number and sequence of stages are selected according to the substrate, coating specification, and required finish.
Yes. We can evaluate an existing paint shop, coordinate the pre-treatment line with downstream painting or powder coating equipment, and provide a solution that fits the available layout and production requirements.
Useful details include the workpiece material, dimensions and weight, production volume, conveyor speed, coating process, desired corrosion protection, and available installation space. Photos, drawings, or sample parts can also help us prepare a more accurate recommendation.