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Applied organic coating

Powder coating

The widest colour and texture range of any finish we apply, with a tough cured film.

Dry powder is sprayed electrostatically onto a grounded part, then cured in an oven where it melts, flows and cross-links into a continuous film. Because there is no solvent, the film can be much thicker than a wet paint in one pass without runs or sags.

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How it compares

Relative to the other finishes we apply. A selection aid, not a specification.

  • Corrosion resistance Very good
  • Wear resistance Good
  • Colour range Excellent
  • Edge and recess coverage Good
  • UV stability Very good
  • Repairability Fair

How the process works

  1. Pre-treat: degrease, then a chromate-free conversion coating for adhesion and corrosion.
  2. Spray electrostatically — the charged powder wraps the part and clings before curing.
  3. Cure at 180–200 °C for the time the powder manufacturer specifies.
  4. Cool, inspect and touch up where the specification allows.

Thickness and systems

Option Range Note
Standard decorative 60–90 µm The default for interior and general architectural work.
Architectural / exterior 80–120 µm Qualicoat or AAMA 2604/2605 systems for UV and weather exposure.

Typical properties

Property Value
Film thickness 60–120 µm
Cure temperature 180–200 °C
Pencil hardness H–2H
Impact resistance (direct) Typically > 50 kg·cm
Salt spray, architectural systems 1,000–3,000 hours

Advantages

  • Essentially unlimited colour, gloss and texture — the broadest palette of any finish here.
  • Thick, tough film with good impact and abrasion resistance.
  • No solvents, so a heavy build is possible in a single coat.
  • Exterior-grade systems (Qualicoat, AAMA 2605) hold colour for decades.
  • Covers extrusion die lines and minor surface marks well.

Limitations

  • Cure temperature of around 200 °C will distort thin or heavily worked sections.
  • Thicker film than anodising, so it eats into tolerances and closes fine clearances.
  • Not weldable after coating — the film burns back and cannot be blended invisibly.
  • Deep recesses can suffer from a Faraday-cage effect and take a thinner coat.
  • Metallic and effect powders are noticeably harder to match across batches than solid colours.

Design notes

What costs money when it is discovered after tooling.

  • Add the film thickness to your dimensions: a 100 µm coat adds roughly 50 µm per surface.
  • Mask threads, bores and mating faces, or plan a post-coat machining operation.
  • Avoid sharp edges — powder pulls back from a crisp arris and leaves a thin, weak line.
  • Keep wall sections above about 1.2 mm if the part has to survive the cure oven without bowing.
  • Specify the standard, not just the colour: Qualicoat and AAMA 2605 are not the same promise.

Colour and effect range

  • Any RAL or Pantone reference
  • Metallic and pearlescent
  • Matte, satin and gloss levels
  • Textured and hammered effects
  • Anti-bacterial and anti-graffiti top coats

Standards

  • Qualicoat (architectural powder coating)
  • AAMA 2604 / 2605 (USA)
  • ISO 12944 (corrosion protection)
  • EN 12206-1

Typical applications

  • Architectural facades, windows and railings
  • Outdoor furniture and street furniture
  • Electrical enclosures and cabinets
  • Bicycle and scooter frames
  • Machine guards and covers

Other finishes

Conversion coating

Anodising

An aluminium oxide layer grown out of the metal itself — hard, integral and never peels.

Electrodeposited organic coating

Electrophoretic coating

Paint deposited by electric current, so every edge and recess gets the same film.

Surface texture, no coating

Mechanical finishes

Brushing, polishing and blasting change the surface texture without adding a coating.

Sublimation transfer over powder

Wood grain transfer

A photographic wood or stone texture sublimated into a powder coat — the look of timber…

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