A Guide to Alocrom Plating

AlocromAlocrom plating is a chrome conversion coating used to plate aluminium and increase corrosion resistance. It creates a pre paint finish and good adhesion qualities. Benefits include:

  • Corrosion resistance
  • Excellent paint and power bonds
  • Can withstand heat after coating
  • Can self-heal if scratched
  • Low electrical resistance

However, alocrom plating is not suitable for decorative effects as a change in colour may occur.

What can alocrom plating be applied to?

Alocrom is chemically applied to aluminium. There are two types of alocrom:

  1. Alocrom 1000 can provide the best protective coating without changing the appearance of the aluminium and is best for electrical conductivity.
  2. Alocrom 1200 is also ideal for protection against corrosion to both unpainted and painted aluminium. It forms a protective golden coloured chromate coating on aluminium and alloys and has a more visible colour change.

What is the alocrom plating process?

Alocrom plating is applied by dip or spray washer to give a uniform coating.

The aluminium will be thoroughly cleaned to remove all oil, grease and oxide coatings. It is then dipped into the alocrom solution, and after 1 – 5 minutes the coating will show up as a golden yellow. It is then rinsed with clean water and dried.

What is alocrom plating used for?

Alocrom plating is mostly always used as a pre-paint treatment and for increasing corrosion resistance, making it ideal for coating aluminium and high silicon pressure die-castings. It is used for:

  • Tools within general industrial work
  • Electrical components
  • Household appliances
  • Car parts
  • Aerospace components

Dorsetware provides alocrom chrome conversion coating at our Poole facility in Dorset. To find out more about how alocrom can benefit your project, talk to our technical department by calling 01202 677939 or use our online contact form

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