Chromic Acid Anodising



Chromic Acid Anodising



Chromic Acid Anodising

Chromic acid anodising is a specialist surface finish used primarily within the defence and aerospace sectors and industries where subsequent painting/adhesive bonding is required or in applications where crack detection is sought. Chromic acid anodising is the preferred process for the treatment of castings and other components where the minimisation of the loss of fatigue strength resulting from the anodising process is desirable.


Painting - Adhesive Bonding

For customers that require components painted, or used in composite structures, we offer an overnight service with guaranteed availability at an agreed time the next morning, allowing you time to transport your items for finishing or manufacture before the anodised coating cures, usually within 8-16 hours.

Maximum Size Criteria

The table below outlines the maximum size criteria for chromic acid anodising:

2430mm (8')
1829mm (6')
910mm (3')
910mm (3')
910mm (3')
910mm (3')

Coating Thickness

Chromic acid anodising results in a thin 2-3µm coating.

Available Standards

We predominantly work to 2 specific standards as detailed below although we are happy to work to any specification provided.

Sealing & Dyeing

Two seals are available for application after chromic acid anodising:

Metro Engineering and Plating Works Ltd - Unit 3 - Chartridge Development - Eskdale Road - Uxbridge - Middlesex - UB8 2RT - UK
Tel: 01895 254666 - E-mail:
Sulphuric Acid Anodising - Chromic Acid Anodising - Hard Anodising - Chromate Conversion - Alocrom - Stainless Steel Passivating
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