EFFECT OF THE HEAT AND SURFACE LASER TREATMENT ON THE CORROSION DEGRADATION OF THE Mg-Al ALLOYS
Journal Title: Materials Engineering - Materialove inzinierstvo (MEMI) - Year 2011, Vol 18, Issue 3
Abstract
In this paper there is presented the corrosion behaviour of the cast magnesium alloys as cast state, after heat and laser treatment. Pitting corrosion resistance of the analyzed alloys was carried out using the potentiodynamic electrochemical method (direct current), based on a anodic polarisation curve. On the basis of the achieved anodic polarisation curves, using the Tefel extrapolation method near to the corrosion potential, the quantitative data were determined, which describe the electrochemical corrosion process of the investigated alloys: value of the corrosion potential Ecorr (mV), polarisation resistance R[sub]P[/sub] (kΩ.cm[sup]2[/sup]), corrosion current density icorr (μA/cm[sup]2[/sup]), corrosion rate Vcorr (mm/year) as well the mass loss V[sub]c[/sub] (g/m[sup]2[/sup]).
Authors and Affiliations
Leszek Dobrzański, Tomasz Tański, Szymon Malara
Keywords
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