Electrophoretic coatings, aluminium

Other important metal finishings to protect against corrosion are conversion coatings such as anodization (especially for aluminium), electroless plating, and electrophoretic painting. The first is done to form a passive layer, and is described in greater detail in Section 16.4. 

Electrophoretic deposition is a colloidal process used to coat either aluminium or stainless steel [122]. Either adhesion layers or complete coatings can be achieved. To-date mainly alumina suspensions have been used for electrophoretic deposition. Wunsch et al. coated microchannels with alumina nanopartides dissolved in oxalic add and mixed with alumina gd or glycerol [124] 2-4 pm thick adhesion layers were formed. Fbdisdi et al. applied dectrophoretic predpitation of industrial catalyst powders at 100 V (dc) [140]. After 2 min a uniform deposition of the catalyst powder on the surface was achieved. 

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