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Welcome To Ultimate Anodise

Anodising Process

Ultimate Anodise

Aluminium Anodising is the electrochemical process by which aluminium is converted into a structured aluminium oxide on the surface of a part. This oxide layer is highly homogeneous and is molecularly connected to the base material and results in exceptional properties of corrosion resistance, abrasion resistance and durability.

During the Anodising process, several controls are critical to assure the specified film thickness, its hardness, abrasion resistance and density. These controls include a precise combination of chemical concentration, temperature and current density. In the production of quality anodised products, there is no alternative to having sophisticated processing and monitoring equipments.

    Anodized Aluminium is increasingly replacing traditional metal and expensive stainless steel in various application for the following reasons:
    • Less Weight
    • Less Expensive to Produce, Handle and Ship
    • Can be Machined Twice as Fast as Stainless Steel
    • Machine Components with Tight Tolerances Can be Anodised Without Changing the Dimensional Requirements of The Part
    • More Durable Surface
    • Energy Cost Savings: Anodised aluminium replaces hardened-steel moulds for plastic injection moulding, saving on energy costs due to the heat retention properties of anodised aluminium
    • Anodising Process is Environmentally Friendly Both by the Chemicals Used and its Low Cost of Recyling

    Process Parameters

    Applying tight controlled parameters are crucial to Hard Anodising efficiency and final micro-finish.
    • Quality Power Supply Electronics
    • Tank Design
    • Manual/Auto Control Capabilities
    • Proper Agitation Set Up
    • Additives              


Ultimate Anodise Ltd has specialised in Aluminium components Type II and Type III anodizing as well as Electropolishing of Stainless Steel components.
Our focus is on providing the ultimate quality in Anodizing and customer service with flexible production to meet client’s time schedule.
Ultimate Anodise has developed and maintained a specialty of well recognised “Hard Anodizing” and “Hard Black Anodizing” of Aluminium components serving in extreme wear conditions.
Specification Finish Coating Thickness
Type II - Class 1 Standard Anodizing Clear / Non dyed 12 µm= 0.0004 inch = 0.4 mil
Type II - Class 2 Standard Anodizing Coloured / dyed in black or blue finish 12 µm= 0.0004 inch = 0.4 mil
Type II – Marine Class 1 Semi Hard Clear / Non dyed 25 µm - 0.001 inch = 1 mil
Type II – Marine Class 2 Semi Hard Dyed in black finish 25 µm - 0.001 inch = 1 mil
Type III - Class 1 Hard Anodise Non Dyed / Anodic coating of Green Brownish colour 60µm – 0.002 inch = 2 mil
Type III - Class 2 Hard Black Anodise Dyed in black finish 60µm – 0.002 inch = 2 mil
Type III Hard Anodise (60+ micron)
Ultimate Anodise

Hardcoat anodise, commonly referred to as Type III Anodising, on which a dense and thicker coating is produced under tough controlled conditions of temperature and current density. This will produce a generally Brown / Greenish coating of 60+ microns with 50% build up and 50% penetration.


Hard Coat process results in an extremely hard surface, and is the most desirable electrochemical coating of Marine Environment, vital for metal parts that need to withstand the rigors of a marine environment, high moisture, humidity, salt spray, fuel and petroleum products, chemicals and lubricants. anodised coatings will not chip or peel, and resists ultraviolet (UV) radiation so colours will not fade, even in direct sunlight.


Automotive industry are increasingly recognising Hard Anodise of complex parts such as pistons, anti-lock brake assemblies, pump components, valves, insulation plates and transmission parts.


The number of applications of hard anodised aluminium continues to grow rapidly, manufacturers or users of engineering equipments would be well advised to examine the profitability of hard coated aluminium because of it's unique properties.

Type lll Hard Black Anodise (60 + micron)
Ultimate Anodise

After Hard Anodising process is completed, the porous nature of anodic coating is impregnated by a speciality black dye prior to sealing process to prevent colour loss in service. Hard Black Anodise is the highest grade of Anodising process combining maximum durability with an elegant black finish.

Electropolishing of Stainless Steel Components
Ultimate Anodise

Elctropolishing is an Electrochemical Process, simply referred to as a reverse form of Anodizing / Plating. It involves removal of metals like Carbon, Nickel, Silica, Iron, and Other impurities from a stainless steel surface leading to smooth and bright surface rich of Chromium.


    What are the Hard Anodise coating properties?
    •  Increased Corrosion Resistance 
    • Increased Durability / Wear Resistance
    • Ability to be Coloured in Black Through Dying
    • Electrical Insulation
    • Anodising is Unaffected by Sunlight: All organic coatings will eventually fail due to exposure to ultra-violet light

    Can any metal be anodised?
    The anodising process can only be applied to Aluminium alloys. Although most Aluminium alloys can be processed, those with a low copper content (less than 3.5%) and a low silicon content (less than 5%) are recommended. The best results occur on 5000, 6000 and 7000 series, 355, 356 cast alloys and 319 die cast alloys. On the other hand, 2000 Series Alloy has excellent mechanical properties but very difficult to hard anodize.

    Does Hard Anodise "thickness" mean the amount of buildup above the surface?
    No, the term “thickness” includes both the amount of penetration and the amount of build-up. Unlike plating or painting which is 100% build-up, the coating thickness of hard Anodising is 50% build-up and 50% penetration, ie, Hardcoat penetrates the base metal as much as it builds up on the surface. However, the depth of penetration and amount of buildup can vary according to the aluminium alloy.

    Will there be any marking from the Anodising process?
    Yes, each component must be properly racked to maintain firm electrical and mechanical contact during the aluminum Anodising process.
    Since each rack contact point leaves a small void in the coating, it is important for the contact to be made in a non-critical area.


Hard Anodise Properties:
Ultimate Anodise

    • Maximum Hardness & Wear Resistance
    • Maximum Corrosion Resistance
    • Electric Insulation
    • Temperature Resistance
    • Tolerance Control with Uniform Buildup
    • The Hard Anodise Process Follows the Contour of the Part with a Uniform Build Up Coating
Applications of Hard Anodising:
Ultimate Anodise

Major user industry sectors are:

    • Marine
    • Hydraulic
    • Pneumatic
    • Automotive
    • Military
    • Aerospace
    • Defence
    • Energy
    • Electronic
    • Appliance

Quotation / Enquiries

Please provide a description of your parts, quantities and other details to enable us providing a proper quotation

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Contact Us

Find us
Ultimate Anodise
2/28 Henderson Valley Road
Henderson 0612

Phone : 09 836 8889
Fax : 09 836 8883
Mobile : 021 176 8889

General Inquiries :

Managing Director :