Materials Engineering, Vol. 17, 2010, No. 4

PDFTech ReportCorrosion resistant alloysCorrosion resistanceMagnesium alloysPeeningMetal hardeningElectrochemical corrosionElectrochemical processesHadzima, BranislavBukovina, MichalDolezal, PavelUS Transportation Collection"Evaluation of the electrochemical characteristics of the AE21 magnesium alloy is presented in the article.The surfaces of tested alloys were treated by grinding and grinding followed by sodium bicarbonate shotpeening.The specimens were evaluated by electrochemical impedance spectroscopy method in combination withexposure tests in 0.1 NaCl solution. The exposition times were from 5 minutes to 168 hours. The measured datawere analysed using equivalent circuits and polarization resistances of the various corrosion systems weredetermined. Results of the electrochemical measurements are complemented by metallographical evaluation ofthe tested alloy.