Hard Anodising

Hard anodising is very similar to sulphuric anodising, but produces a thicker oxide layer and therefore increased corrosion resistance compared to standard sulphuric anodising. A thickness of 20µm to 80µm can be achieved with this process. Greater thicknesses may be possible using a more complex process, please contact us for details. This is acheived using a refrigerated process.

Hard anodised parts can be dyed (see sulphuric anodising for a list), however the colour will differ to sulphuric anodising parts.

Both common sealing methods (boiling water and dichromate seals) are offered for this process

Specifications/Standards

Our hard anodising process conforms to: