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Many information can be found in aluminium-manual, which is being completely revised and will soon be available. In the meantime, please use our glossary for useful word explanations.


The process of wearing down surfaces by external friction forces.



Increase in ageing temperatures in artificial ageing lead to further reductions in the go the precipitation-hardening, positive influence on stress corrosion cracking and toughness properties.

Aluminium oxide

Chemical compound of oxygen and aluminium (Al2O3), protective layer.


Heat treatment without visible structural changes to reduce residual stresses.


Cancellation of two dislocations of opposite sign – metallurgical process.

Anodized quality

Materials suitable for anodizing are subjected to appropriate metallurgical and mechanical pre-treatment to ensure reproducible properties.


Electrolytic passivation process used to increase the thickness of the natural oxide layer.


Driving force of chemical reactions; the tendency of ions, atoms to associate with another.