INFLUENCE OF LASER SURFACE HARDENING ON CORROSION PROPERTIES OF Al-Zn-Si CAST ALLOY
نویسندگان
چکیده
E. Tillová, L. Kuchariková, M. Chalupová, J. Belan, A. Vaško, I. Švecová, University of Žilina, Faculty of Mechanical Engineering, Slovak Republic This work is focused on the effect of the laser surface treatment (laser power 50 and 80 W) on microstructure and corrosion properties of self-hardened AlZn10Si8Mg cast alloy used for engine and vehicle constructions. The electrochemical impedance spectroscopy (EIS) technique and Nyquist plots in a 1M NaCl test solution at 20 °C were carried out. A detailed corrosion study showed that corrosion resistance samples with laser layer were marginally less; probably the presence of chloride ions significantly damaged the Al2O3 film and caused the formation of NaAlO2.
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