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Anodizing – Electrofer 4 Anodizing |


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The anodic oxidation pay for essay writing online (Anodization) constitutes in the electrolytically stimulated oxidizing of the metal’s surface performed in an acidic solution. The Aluminum Oxide layer (Alumina) formed serves as corrosion barrier and increase the treated part’s surface hardness, professional phd thesis writers allowing a higher scratch resistance and abrasion resistance.

Electrofer 4 uses chemical solutions based on the combination Sulphuric-Oxalic which has significant advantages compared to traditional sulfuric solutions , namely in the range of usable current density and resistance to contamination by Aluminum.

The pretreatment procedure is designed to reduce the aggressiveness to the base metal, thus achieving very low roughness values in parts with polished surfaces.

The Alumina layer formed by this process is characterized by a network of pores. Those pores need to be closed or filled by a Clogging (Sealing) process applied after the Anodizing.

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The Hot Clogging consists in dipping the anodized part in demineralised water at a near boiling temperature. Thus, the layer of Alumina will hydrate, increasing in volume and thereby closing the pores.

The Cold Clogging consists in dipping the anodized part in a solution of Nickel salts (the more usual is the Nickel Acetate). The Nickel salts will introduce themselves into the interior of the pores, filling them.

These processes can be used individually or in combination for best corrosion performance.

Electrofer 4 has also a technology to apply a Top Coat that how to write a research paper outline allows the pieces to be resistant to substances with pH up to 13.5, notably detergents used in washing cars. This feature is of crucial importance for Aluminum components that are places on the exterior of the vehicles.