Erzeugung Nanofaser-verstärkter Ceroxidschichten auf AZ31

A. Anthes, O. Harper, W. Fürbeth

Prof. Dr. Timo Sörgel (Hrsg.), Jahrbuch Oberflächentechnik 2016 - Band 72, Eugen G. Leuze Verlag, Bad Saulgau (2016) 60-69


The automotive and aerospace industries demand
on more lightweight materials to make their vehicles more energy efficient and
environmentally friendly. Vehicle components made of steel or aluminum may be
replaced in the future by parts made of magnesium alloys. A new surface
preparation for the magnesium alloy AZ31 was developed, which can produce very
clean, smooth and mirror like surfaces. The method outlined is also
characterized by its simple application. The surfaces were investigated with
AFM and SEM measurements. In addition, ultrasonically prepared aqueous
cerium(III)nitrate dispersions containing nanoparticles were investigated by
dynamic light scattering (DLS) for the subsequent conversion step. The prepared
sample sheets have a nearly crack-free nanofiber reinforced cerium oxide layer
generated by using ultrasound. The coatings were analyzed by XRD, SEM and Raman
spectroscopy. In the focus of future work, the coatings are intended to be
electrochemically characterized (electrochemical impedance spectroscopy) with
addition of corrosion inhibitor loaded nanotubes, which release the inhibitor
by a trigger.


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