Aluminium Anodizing

GAL-Aluminium-Anodise GAL-Aluminium-Components

What is anodizing?

Anodizing is an electrolytic passivation process used to increase the thickness of natural oxide layer on the surface of metal parts. The process is called anodizing because the part to be treated forms the anode electrode of an electrical circuit.

GAL’s Anodizing Capabilities

✔ GAL’s surface treatment division is capable of handling 75 MT / month, natural & SnSo4 based colour anodizing with precision and aesthetic match delivered with permanent sealing (hot & cold) from 5 to 25 Micron

✔ GAL aluminium components has the capacity to anodize components produced from aluminium extrusions and ranging from 10 mm to 2.7 metres in shades of gold, silver, natural and black.

✔ The computerized bar code label attached to each package indicates details such as the section number, bundle number, bundle weight, number of pieces, lot number etc. for accountability and traceability.

✔ Anodizing can be performed on parts you supply or as one of the added processes applied to aluminium extrusions and components we manufacture for you.

Anodizing can substantially increase corrosion resistance and wear resistance, and anodized parts provide better adhesion for paint primers and glues than bare metal.

Benefits of anodizing ?

✔ Increases corrosion resistance and wear resistance, and provides better adhesion for paint primers and glues than bare metal.

✔ Anodic films can also be 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.

✔ Prevents galling of threaded components and to make dielectric films for electrolytic capacitors.

Anodic films are most commonly applied to protect aluminium alloys, although processes also exist for titanium, zinc, magnesium, niobium, and tantalum.

This process is NOT a useful treatment for iron or carbon steel because these metals exfoliate when oxidized; i.e. the iron oxide (also known as rust) flakes off, constantly exposing the underlying metal to corrosion.

Picking the right aluminium alloy for anodizing

Choosing the right aluminium alloy for an anodizing job can be a difficult process.

There are many types of aluminium alloy available and most come in various tempers. Alloys are divided into groups each with certain physical characteristics and properties that may or may not suit your needs(requirement). In addition, each of these alloys will anodize differently and this will need to be taken into account when selecting your aluminium alloy.

If you are intending on making(intending to make) a product out of aluminium that you intend(need) to anodize, then in addition to the physical characteristics of the alloy it is important that consideration is taken of the following;(to consider following things:)

✔ Is the main purpose of anodizing protective, decorative or both?

✔ Do you require a matt or bright finish?

✔ Do you require a natural or coloured finish?

✔ Do you require hard anodizing?