Compared with sulphuric acid anodising, the chromic acid anodising process gives relatively soft, thin coatings, normally of two to five microns thickness. These are used mainly for electrical insulation and general protection against corrosion under mild conditions. Unsealed coatings are used as a ‘key’ for paints and adhesives. It is light grey in colour, with a very silky texture.
Chromic Acid Anodising in Aerospace and Defence
In the critical fields of aerospace and defence, our chromic acid anodising process ensures safety and precision. The method’s thorough electrolyte removal is crucial for components involved with explosives and propellants, enhancing safety and operational integrity.
Applications Include:
Defence industry components – especially those involving explosives, propellants or pyrotechnics where complete removal of the electrolyte is essential for safety reasons.
Components containing crevices or small blind holes.
Pre-treatment for painting, especially in aerospace applications.
Flaw detection – a technique for identifying cracks, folds, inter-crystalline corrosion, machining damage, incipient melting of grain boundaries and cold shuts.
