Electrocolouring Process for Anodised Aluminium & Alloys

Liquid system and Colour range is from champagne clear to a dark bronze and deep black.  The system is ready-mix stabilized and balanced solution containing stannous sulphate and a stabilizer component for the replenishment of the electrolyte.  This provides very good colour penetration and colour stability and minimizes the potential problems of smut build up when processing darker colours that can affect seal quality.

The colours obtained with this system are lightfast and do not fade even under the strongest UV climates.
In architectural applications, even after many years, the ability to clean ALUMAL COLOUR 890/891 surfaces is possible without degrading the colour.

Features & Benefits

  • System stability prevents oxidation of divalent tin so long life process
  • Improved throwing power of electro colouring bath for difficult profiles / components
  • Very high colour stability and less re-work
  • For darker colours (dark bronze, bronze) possibility to operate as one component (low stabilizer consumption)
  • Low sludge tendency even by using DC pre-treatment

This process belongs toElectro-Colouring 800 Series

In many markets and for a multitude of applications where aluminium and alloys are utilized including the architectural, automotive, aircraft/aerospace industries, colours of many types of parts and surfaces provide an important visual or aesthetic appeal.

Electro-Colouring 800 Series – Provides a very stable, long lasting colour option to anodized aluminium layers for very demanding applications.  The process is an electrolytic process post anodizing that deposits metals into the pores of the anodize surface.  The resulting colour is dependent on the type and amount of metal deposited.  Nickel based chemistries produce stainless steel shades to lighter bronze colours. Tin based systems are designed for darker ranges of colour applications and copper based provide light pink to red colours.  COVENTYA offers several ALUMAL Colour options including the following.

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