Pre-Treatment | RW Powder Coatings Ltd

By: Rw Powder Coatings  05/12/2011
Keywords: powder coating, powder coatings

The purpose of pre-treatment in the powder coating process of architectural aluminium is twofold. Firstly, to protect the aluminium against corrosion and secondly, to prepare the surface to allow optimum adhesion of the paint.

RWPC operate a strictly controlled and audited 11 stage pre-treatment facility. This process gives the strength behind the guarantees by ensuring optimum adhesion of the paint film, and long term corrosion resistance.

The following are the main steps carried out with double rinsing between.

Acid Etch

Removal of swarf + aluminium oxide layer

Chromium-Phosphate Conversion

Protective coatings

Demineralised Rinse

Maintained below 30m to maximise the effect of the pervious stages

Controlled Drying

Kept below 80°C to avoid damage to the fresh Chromate layer, leaving a surface where optimum adhesion is possible

Chemetall Plc

The RWPC pre-treatment system is closely monitored by Chemetall Plc.

The Chemetall technical staff reguarlaly visit the RWPC site to audit each invidual process and to ensure consistency of performance. Chemetall are world wide leaders in the field of pre-treatment chemistry.

Keywords: powder coating, powder coatings

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