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Quality Surface Finishing

Astro Anodising

Astro Anodising offers superior anodising services to manufacturers using aluminium in the production of their end products. Our customers are spread over a broad range of different industries including those in the automotive and architectural sectors.

Astro Anodising

Astro Anodising is a division of The Astro Group that specialises in superior anodising services to manufacturers using aluminium in the production of their end products.

With our large selection of colours and finishes and our capability to anodise work in sizes ranging from small cast or machined components right up to lengths of 7.5m, we are truly your “one stop shop”.


Astro Group Aluminium Window Frame
Astro Group Anodising Colours
Astro Group Anodising Tubes

Aluminium Anodising Explained

Anodising is an electro-chemical process used to increase the thickness and density of the surface of metal parts. Anodising changes the microscopic texture of the surface and can change the crystal structure of the metal near the surface.

The process of anodising derives its name from the fact that the part to be treated forms the anode portion of an electrical circuit in this electrolytic process.

Anodising is generally much stronger and more adherent than most paints and plating, making the aluminium less likely to crack and peel.

Anodising is also used for a number of cosmetic effects, either with thick porous coatings that can absorb dyes or with thin transparent coatings that add interference effects to reflected light. Coatings are often porous and thick, so a sealing process is most often used to improve corrosion resistance.

On carbon steel anodising is of no use because rust puffs up and flakes off, constantly exposing new metal to corrosion. With aluminium however, anodising will increase its corrosion resistance.

Our Anodising Services

Anodising will not peel or flake because it is actually part of the metal. The surface is hardened and protected, unaffected by sunlight and virtually fade resistant, ensuring extended product life.

Anodising Divisions

Architectural Division

We offer anodising up to 7.500 metres in natural finish or a choice of colours. Specifically; Bronze 541, 542 and 543 as well as Black 549. Thickness specifications: 15 or 25 µm.

Natural Anodising is a great pre-treatment for paint or powder coated finishes and is highly recommended for coastal applications due to its superior corrosion resistance. For a durable, cost effective and eco-friendly surface treatment, anodising is the way to go.

Astro Group Architectural Anodising

Semi Architectural & Brightening Division

Everything from a metre length to 3.350 metres can be offered in various colours in either a matt or bright finish. Mechanical polishing and brushing on various extrusions are just some of the various pre-treatment options from which one may select. Full size sheets (3000mm x 1500mm) are also available in a natural finish. Smaller sizes are available in various colours.

Ou range of colours includes natural, brass, purple, black, red, green, silver, blue, pink, gold, orange, bronze, bronze (541-545) and bronze (double dip Process).

Astro Group Semi Architectural Anodising

Component Division

Here we specialise in the anodising of various aluminium components. Purpose designed titanium jigs are utilised to limit the contact marks. Job specific jigs can be manufactured for volume based work. 

Our standard colour range is as follows: natural, gold, purple, silver, brass, green, red, champagne, pink, blue, black, bronze, orange and gun metal blue.

Astro Group Component Anodising

Let’s talk.

For more information about our products and services please don’t hesitate to contact us today and we’ll respond as soon as possible.