Pre-treatment

Enhacing the durability of powder coating

Swallow Architectural Coating operate a Seven stage immersion pre-treatment system using chemetall products including Chromium – free Gardobond x4707 technology.

Aluminium extrusions supplied directly from our customers and the system house are often contaminated with oil silicone and other residues and also traces of natural oxidisation on the surfaces, so therefore its vital that the pre-treatment process is carried out to the highest standard to give you perfect adhesion and long term protection against corrosion.

7 Stage Pre-Treatment Process










Stage 1
Caustic Etch

Stage 2
Mains Water

Stage 3
Acid Etch

Stage 4
Di-Water

Stage 5
Di-Water <200 µs

Stage 6
Chrome Free

Stage 7
Di-Water <30 µs