How to eliminate the effect of hard anodising on the oxidised surface quality of aluminium sheets

How to eliminate the effect of hard anodising on the oxidised surface quality of aluminium sheets

The quality of the aluminium sheet surface in hard anodising may be affected to a certain extent, and oxide surface pre-treatment and rough surface pre-treatment are two ways in which the effect of hard anodising on the quality of the aluminium alloy sheet oxide surface can be eliminated. What do they mean specifically? Let's take a look today!

And oxidation surface pretreatment: through chemical or electrochemical etching of metal and oxide film on the surface of the full range of corrosion products, etching process can be divided into improved light etching of the surface brightness, remove the surface passivation film of acid impregnation, so that the metal surface activation, remove the aluminum alloy plate thick oxide film and surface hardening of strong erosion.

Rough surface pre-treatment: rough surfaces can be achieved by mechanical methods, chemical methods and pre-treatment electrochemical methods. Mechanical methods of polishing are often used to remove roughness and mechanical defects from the surface of parts, and can be selected according to the needs of different materials and abrasives of different grain sizes. Coarse and fine grinding, polishing, etc. are all possible to achieve a mirror shine level of fine polishing. Chemical polishing is an etching process in which the surface of an aluminium alloy sheet is processed in a specific solution by electrochemical polishing of the anodised electrolyte to give it a brighter surface finish. This is a common method of obtaining a glossy mirror finish, while other treatments include sandblasting, brushing, etc.

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