Anodising

Anodising is an electrolytic process applied to aluminium alloys to increase the thickness of the natural oxide layer and thereby increasing the resistance to wear and corrosion.

Anodised aluminium is a harder surface than aluminium and its wear properties improve with thicker layers, but due to increasing porosity the surface corrosion resistance requires a sealing process.

Anodising can also be for cosmetic appearance by absorbing coloured dyes into the porous surface prior to sealing.

Expert Developments offer both Sulphuric acid Anodising and Hard Anodising.

A range of colours/dyes is available, including natural, black, red, blue, gold and green.

Chromate Conversion Coating of Aluminium components

This immersion, non-electrolytic process is used as a corrosion inhibitor, paint primer, decorative finish and also to retain electrical conductivity.

The specifications often called up are DEF Stan 03-18 and MIL-C-5541 Class 1 (Alocrom 1200) and MIL-C-5541 Class 3 (Alocrom 1000) both of which we provide and certify.

RoHS and WEEE compliant coatings are readily available, as indicated below:

Types of Products Suitable For

  • Fasteners
  • Electrical components
  • Connectors
  • Turned / Milled Parts

Technical Details

  • Up to 1 Metre Length
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Process

Alocrom 100

Alocrom 1000

Alocrom 1200

Surtec 650

Appearance

Iridescent blue/green

Clear

Gold/Straw Yellow

Coloured or Uncoloured

RoHS Compliant

Yes

Yes

Uncertain

Yes

Properties

Optimum Corrosion Resistance

Excellent Electrical Conductivity

Good Corrosion/Conductivity

Good Corrosion/Conductivity

Resources Available

Plating thickness measurement and control

Rapid turnround –
same day fast track rates available

Wealth of experience and knowledge

Extensive process range –
commercial to high specification

Personal account service

Best practice environmental controls

QA system registered ISO 9002

Special projects/developments

Profit improvement initiatives directly with client

Collection and delivery often can be arranged in our own van

Shipments using next day courier services

No annual shutdown