Dipping Type Surface Pre-treatment Systems
What are Immersion-Type Surface Cleaning Systems?
Immersion-type (dipping) surface cleaning systems are pre-treatment systems used to rid metal parts of oil, dirt, oxides, and other surface contaminants prior to coating. They operate on the principle of submerging the parts into chemical baths.
In these systems, parts are held within chemical tanks for specific durations using a crane or an automated transport system. This method ensures high cleaning performance, especially on complex geometries, hollow sections, or surfaces that are difficult to reach.
How Does Immersion-Type Surface Cleaning Work?
The system operates by submerging the part sequentially into different chemical baths. A specific process is performed in each tank. It generally consists of the following stages:
Degreasing: Removal of oils and industrial contaminants.
Rinsing: Cleaning off chemical residues.
Phosphating or Surface Preparation: Creating a conversion layer for adhesion.
Passivation: Enhancing corrosion resistance.
Final Rinsing: The final step before the drying process.
The part is held in each bath for a specific duration to ensure the chemical makes full contact with the surface. This method offers more thorough cleaning compared to spray systems.
Advantages of Immersion-Type Surface Cleaning Systems
High cleaning performance on complex and enclosed geometries.
Effective chemical contact on internal surfaces.
Homogeneous and deep surface preparation.
High adhesion and long-lasting coating results.
Controllable process durations.
Difference from Spray Systems
In immersion systems, the part is completely submerged in liquid, whereas in spray systems, the surface is cleaned via pressurized spraying. Therefore:
Immersion Systems → Ideal for difficult and detailed parts.
Spray Systems → Suitable for high-volume and mass production.
Immersion-Type Surface Cleaning System Prices
Prices for immersion-type surface cleaning systems vary depending on the design and process structure.
The primary factors determining the price are:
Number of baths (tanks): The complexity of the chemical process.
Tank volumes and dimensions: Larger tanks require more material and higher chemical volumes.
Chemicals used: Specific treatments may require specialized tank linings.
Heating system: Use of electrical resistances, coils, etc.
Handling system: Inclusion of cranes or automated transport units.
Material construction: Choice between DKP (mild steel) or stainless steel.
As the number of baths and tank volumes increase, the system cost rises accordingly.
Areas of Application
Automotive and sub-industries
Heavy industry components
Metal construction
Defense industry
General industrial coating lines