Experts in Hard Anodising Services since 1971

We are a dedicated provider of specialist metal finishing services, concentrating primarily on the anodising of aluminium.
ISO 14001

ISO 14001 Certificated

Family Run Firm

Nadcap Accredited

Local Community Support

Hard Anodising

Hard anodising is a branch of sulphuric acid anodising where process conditions have been pushed in a certain direction to achieve significantly harder, thicker, denser films.

Due to the multiplicity of variables influencing coating performance, it is challenging to convey in writing the possibilities and constraints of the process.

However, applications involve resistance to wear, corrosion, temperature effects etc. 


View All Services

Hard Anodising Limited offers a wide range of anodising services meeting a huge list of industry specifications. To find if we can meet your requirements please visit our Specifications page.

View more about our Services


Hard Anodising Limited have evolved into one of the world’s most advanced suppliers of anodising services to the Aerospace, Defence, Automotive and Precision Engineering sectors…

Aerospace & Defence

Precision engineered parts approved for aerospace or defence must be handled carefully and to a top standard. Hard Anodising Limited are constantly improving processes and services to achieve this.

Read more about our anodising services for the aerospace industry.

Motor / Automotive

To increase the abrasion and corrosion resistance of the surfaces frequently used in motorsport, numerous surface treatments are available. 

Learn more information about the anodising services we offer for the automotive industry.

Oil & Gas

Aluminium components often in use in the oil and gas industry will have its abrasion slowed down by a strong anodic coating. We have a dedication to offer the very best hard anodising services.

Learn more about our processes and how we can assist you in the oil and gas industry.

Our Anodising Services

Hard Anodising Services

The anodising process provides a method of electrolytically increasing the thickness of the naturally occurring oxide film…

hard anodising services - chromic-acid-anodising-thumb

Chromic Acid Anodising

Compared with sulphuric acid anodising, the chromic acid anodising process gives relatively soft, thin coatings…

hard anodising services - Conversion Coatings

Conversion Coatings

Chromate conversion coatings are obtained by chemical reaction with the metal being treated to form a complex chromate film…

Electroless Nickel Plating

Electroless Nickel Plating is produced by a chemical process alone without the need for an electric current…

hard anodising services - Stainless steel passivation

Passivation of Stainless Steels

Passivation of stainless steel parts removes impurities picked up from previous manufacturing operations; fragments…

hard anodising services- Selective Coating Masking

Selective Coating/Masking

Masking is applied to preserve close-tolerance dimensions such as threads; to maintain electrical conductivity…

hard anodising services- Sulphuric Acid Anodising

Sulphuric Acid Anodising

The types of sulphuric acid are sub-divided into classes mainly determined by the field of application…

Newsletter Sign up

    Cookie Control

    Cookie control

    We have placed cookies on your device to help make this website better.

    I'm fine with this

    We use cookies to give you the best online experience.

    Please let us know if you agree to all of these cookies.

    Some of the cookies we use are essential for the site to work.

    We also use some non-essential cookies to collect information for making reports and to help us improve the site. The cookies collect information in an anonymous form.

    To control third party cookies, you can also adjust your browser settings.

    I'm fine with this
    (One cookie will be set to store your preference)
    (Ticking this sets a cookie to hide this popup if you then hit close. This will not store any personal information)
    Information and Settings Cookie policy