%0 Journal Article
%A Pardo Gutiérrez Del Cid, Ángel
%A Casajús, P.
%A Mohedano Sánchez, Marta
%A Coy, A.E.
%A Viejo, F.
%A Torres, B.
%A Matykina, Endzhe
%T Corrosion protection of Mg/Al alloys by thermal sprayed aluminium coatings
%D 2009
%U https://hdl.handle.net/20.500.14352/107104
%X The protective features of thermal sprayed Al-coatings applied on AZ31, AZ80 and AZ91D magnesium/aluminium alloys were evaluated in 3.5 wt.% NaCl solution by electrochemical and gravimetric measurements. The changes in the morphology and corrosion behaviour of the Al-coatings induced by a cold-pressing post-treatment were also examined. The specimens were characterized by scanning electron microscopy, energy dispersive X-ray analysis and low-angle X-ray diffraction. The as-sprayed Al-coatings revealed a high degree of porosity and poor corrosion protection, which resulted in galvanic acceleration of the corrosion of the magnesium substrates. The application of a cold-pressing post-treatment produced more compact Al-coatings with better bonding at the substrate/coating interface and higher corrosion resistance regardless of the nature of the magnesium alloy.
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