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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Corrosion behavior of plasma coatings CuAl10 and CuAl50 on magnesium alloy AZ 91
 Kubatík, Tomáš František ; Stoulil, J. ; Stehlíková, K. ; Slepička, P. ; Janata, Marek
The most common magnesium alloy AZ 91 is widely used as a structural material, but its use is limited at higher temperatures and high humidity. Plasma spraying is a technology that allows to prepare protective metallic and non-metallic coatings on a wide variety of substrates including magnesium and its alloys. In this study, CuAl10 and CuAl50 were plasma sprayed on magnesium alloy AZ 91 with the aim to study corrosion resistance of the plasma sprayed coatings. The corrosion resistance of layers was evaluated by the method of electrochemical potentiodynamic measurement as well as long-term corrosion tests in a condensation chamber with 0.5 mol\nNaCl at the temperature of 35 °C for 1344 hours. Layers with 1, 2, 5 passes and passes of CuAl10 with the thickness ranging from 75 to 716 mm and CuAl50 with the thickness ranging from 64 to 566 mm were prepared. The increased corrosion velocity was observed in the case of thin layers of 2 and 5 passes due to the development of a galvanic corrosion couple. The CuAl10 layer prepared with ten passes has an outstanding corrosion resistance.
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Material analysis of magnesium alloy AZ 91 with various amount of lithium
 Man, O. ; Petrenec, Martin ; Ptáček, L.
he contribution deals with magnesium alloy of commercial grade AZ 91 with various amount of lithium addition (5.5, 8 and 12 wt.%). The alloy was observed in the as-cast state and after annealing. Various types of analysis were done, such as metallographic one using light microscopy, scanning electron microscopy and transmision electron microscopy, in order to gain knowledge about the phase composition of the alloy and its development. Several phases and morphological features were identified, but the rest was not, due to the properties of lithium-rich areas.
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