Alkali ortamda bakýrýn korozyonu üzerine askorbik asidin inhibitör davranýþý

Bu çalýþmada, bakýrýn korozyon davranýþlarýna askorbik asidin etkisi %3.5 NaCl çözeltisinde (pH=9.0) potansiyodinamik polarizasyon ve elektrokimyasal impedans spektroskopisi kullanýlarak araþtýrýlmýþtýr. Askorbik asidin farklý deriþimlerde akým-potansiyel eðrileri ve Nyquist eðrileri elde edilmiþtir. Askorbik asit içeren ve içermeyen %3.5 NaCI çözeltilerinde bekletildikten sonra bakýr elektrotun taramalý elektron mikroskopu (SEM) ile yüzey görüntüleri kaydedilmiþtir. Elde edilen sonuçlardan askorbik asit %3.5 NaCl çözeltisinde bakýrýn korozyonunu engellemektedir. Ýnhibisyon etkinliðinin askorbik asit konsantrasyonundaki azalma ile arttýðý tespit edilmiþtir.

Inhibitor action of ascorbic acid on the corrosion of copper in alkaline medium

In this study, the effect of Ascorbic acid in the corrosion behaviour of copper has been investigated in 3.5% NaCl solution (pH=9.0) using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Current-potential curve and Nyquist diagrams were obtained in different concentrations of ascorbic acid. The surface morphology of copper after their exposure to 3.5% NaCl solution with and without of ascorbic acid was examined by scanning electron microscopy (SEM). The obtained results show that, ascorbic acid inhibits corrosion of copper in 3.5% NaCl solution. Inhibition activity was determined to increase with decrease in the concentration of ascorbic acid.