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Particle reinforced open porous anodizing layers on AA5005

: Schneider, Michael; Kremmer, Kerstin; Weidmann, Stefanie; Fürbeth, Wolfram


Materials and corrosion 68 (2017), No.10, pp.1090-1098
ISSN: 0947-5117
ISSN: 0043-2822
ISSN: 1521-4176
Bundesministerium für Wirtschaft und Technologie BMWi
IGF; 195ZN
Optimierung der Modifizierung von Anodisierschichten auf Aluminiumwerkstoffen durch chemische Nanotechnologie und industrielle Anpassung des Verfahrens
Journal Article
Fraunhofer IKTS ()
aluminum alloy; anodizing; chemical nanotechnology; AA 5005; corrosion protection

The present work deals with the target aimed design of anodic oxide films on AA5005 by modified phosphoric acid anodizing and reinforcement by subsequent impregnation with nanosized silicon dioxide by chemical nanotechnology. The authors show the influence of the anodizing time on the oxide layer thickness, the pore diameter and the morphology. It is revealed that silicon dioxide nanoparticles are successful when incorporated into the open structure pores of the layer. The anodizing and the incorporation process were carried out wet on wet. Complementary electrochemical measurements show the potential of the modified oxide layer in view of corrosion protection despite their deliberated open porosity.