Anodic oxidation is an attachable treatment from highly acidic and basic solutions.

Thanks to controlled baths of nitric acid and caustic soda, we can chemically eliminate the treatment (deoxidation) to be able to re-apply it according to the specifications requested by the customer.

When choosing to deoxidate the sample, must be taken of dimensions and tolerances as the treatment penetrates into the aluminum by half its thickness, so removing it means directly affecting the surface of the metal.

In this case you can proceed in two ways:

In the case of holes, it is possible to make protections with special caps so that the areas are not affected by deoxidation
Then treat the details with a thickness that is needed to return the dimensions to their original state. Following this method means, tendentially, to work a double oxide thickness compared to the original oxide.

Ex. To reset a special particual deoxidated with a thickness of 20 μm of oxide or G.H.A.®, it is necessary to oxidize the sample with a treatment of at least 40 μm.

All assessments will be made on a case-by-case basis by measuring (if necessary) the listed parts before and after treatment with appropriate instrumentation to ensure correct working results.

Another aspect of deoxidation is the substantial worsening of the base surface in terms of roughness and increased porosity, especially when removing high oxide thicknesses or special alloys are treated. In these cases the same G.H.A. Europe provides surface restoration by brushing and polishing or recommends the most suitable pre-treatment finishes for recovery.