Experts in Hard Anodising Services

Suppliers to a number of F1 and Formula E Teams.

We are a dedicated provider of specialist metal finishing services, concentrating primarily on anodising, electroless nickel plating and conversion coatings.

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.


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Hard Anodising Surface Treatments Ltd 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.

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Hard Anodising Surface Treatments Ltd is one of the world’s most advanced suppliers of anodising services, providing 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 Surface Treatments Ltd are constantly improving processes and services to achieve this.

Read more about our metal finishing services for the aerospace industry.

Motor / Automotive

To increase the abrasion and corrosion resistance of the surfaces frequently used in motorsport, numerous surface treatmentss 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…

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