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Metal pre-wash systems

Metal pre-wash systems

Pre-washing is the basis for quality in powder coating. If the surface of the part is not properly cleaned of grease, oxides, salt residues and dust, the powder coating will fail and the coating may be uneven, poorly tacky or have a short life. A properly designed pre-wash system will ensure a clean, activated surface prepared for corrosion resistance for every detail.

Elister offers Aabo-ideal industrial pre-wash systems designed specifically for powder coating and other surface coating requirements.

Why is proper pre-washing important?

  • Quality of the powdered snacks - a clean surface ensures that the powder hardens into a strong, even coating.
  • Corrosion resistance - phosphate or Zr conversion coatings significantly prolong the lifetime of the part in humid or aggressive environments.
  • Guarantee and certified quality - many detail suppliers require a specific pre-wash procedure (Qualicoat, GSB, EN standards).
  • Less praaki - a stable washing process reduces staining defects (bubbles, poor coverage, peeling).
  • Uniform appearance - the gloss, colour and texture are also stable throughout the production cycle.

Types of pre-wash systems

Chamber-type wash cubicles

  • Suitable for small-scale production, prototypes and separate manual production.
  • Separate baths for each process step (degreasing, rinsing, conversion, final rinsing).
  • A compact, flexible and low investment solution.

Wash Tunnels (Continuous Spray Tunnels)

  • The heart of a continuous production line - parts hanging on a conveyor go through several washing zones in a row.
  • Typical zones: degreasing → rinsing → conversion cover → demineralised water rinsing → drying.
  • The most efficient and highest quality solution for high volume production.
  • Multi-zone configurations - 3-, 5-, 7-zone systems as required.

Choice of chemistry and conversion coverage

Aabo-Ideal washing systems are suitable for all modern detergents and conversion coatings:

  • Zinc phosphate - traditional, very good corrosion resistance.
  • Rough phosphate - a simple and affordable solution for standard applications.
  • Zirconium conversion (Zr) - modern, environmentally friendly, low energy consumption (at room temperature).
  • Basic degreasing - the first step in almost every system.

Who are pre-wash systems suitable for?

Pre-washing systems are essential for anyone who powder coats metal parts at a professional level: aluminium profile manufacturers, steel product manufacturers, automotive sub-contractors, furniture industries, construction profile manufacturers and machine builders. Pre-washing is also a prerequisite for achieving product standards (Qualicoat, GSB, ISO 12944).

“Turnkey” route solutions

Aabo-Ideal prewash systems are naturally integrated with Aabo-Ideal drying ovens and baking ovens and Gema painting booths in a single powder coating line. Elister will design the complete line for you - washing, drying, painting, baking - optimised to your production volume and detail size.

Consultation and sales in Estonia

Elister is the official representative of Aabo-Idea in Estonia. We can help you choose the right type and configuration of pre-wash system, assess your water quality and chemical needs, organise installation, start-up, training and maintenance. Contact us for a quote!

Areas concerned

Aabo-Ideal washbasins

With the immersion method, the prewashed parts are moved through the system using a hanging crane. The details are immersed in various containers as part of the finishing process. The process in the case of the immersion method means there are different tanks through which the parts pass and the number of these stages is chosen according to the specificity of the production. This solution is used in situations where the load capacity of the conveyor requires a high load capacity of the conveyor, or where there are particularities due to the dimensions of the product [...].

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Aabo-Ideal washing tunnels

In spray pre-treatment or tunnel pre-treatment, the product passes through a tunnel, providing a series of steps to prepare the product for processing. These steps are specifically designed for each type of object or product. As such, the design of the tunnel pre-treatment is tailored to the product, dictating the number and length of steps required. Temperatures and materials are also carefully taken into account. AABO-IDEAL pre-treatment systems are insulated to prevent condensation [...]

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Aabo-Ideal washing chambers

The best method for degreasing products in manual or Power&Free conveyor systems is to use chamber-type washers. Depending on the requirements of the chemistry to be used, it is possible to create a single chamber or a series of chambers. During the washing process, the parts are moved into a special chamber where the doors are closed during the operation. Washing is carried out in a similar way to a washing tunnel, except that during the washing processes, one and [...]

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The pre-treatment system carries out surface cleaning, rinsing and preparation of objects or products. Before entering the application process, it is important that the surface is thoroughly cleaned of dirt, oils and contaminants.

How many steps and which chemicals should be used in this process depends on the products. The pre-treatment system is designed to prevent corrosion and increase paint adhesion by treating the surface, e.g. alkaline/acid degreasing, iron phosphate, zinc phosphate, etc.