Elektroforetik biriktirme yöntemi ile grafen oksit kaplanmýþ AA5754 alüminyum alaþýmýnýn korozyon özelliklerinin incelenmesi

Bu çalýþma, ucuz, çevre dostu ve basit bir iþlem olan elektroforetik biriktirme (EPD) yöntemiyle, alüminyum alaþýmýný (AA5754) grafen oksit ile kaplamayý ve kaplamanýn alüminyumun korozyon davranýþý üzerindeki etkisini belirlemeyi amaçlamaktadýr. Grafen oksit kaplamalar, X-ýþýný kýrýnýmý (XRD), optik mikroskop ve taramalý elektron mikroskobu (SEM) kullanýlarak karakterize edilmiþtir. Grafen oksit kaplamalarýn katman katman büyüdüðü ve artan süre ve uygulanan potansiyel ile kalýnlýklarýnýn arttýðý belirlenmiþtir. Grafen oksit kaplamanýn AA5754 alüminyum alaþýmýnýn korozyon davranýþý üzerindeki etkisi, aðýrlýkça %3.5 NaCl ortamýnda potansiyodinamik yöntemle araþtýrýlmýþtýr. Korozyon test sonuçlarýna göre, kaplanmýþ AA5754 alüminyum alaþýmýnýn korozyon potansiyelinin olumlu yönde deðiþtiði, korozyon akýmýnýn ve korozyon hýzýnýn ise azaldýðý tespit edilmiþtir. En yüksek korozyon potansiyeli 5 V-5 dk ve 7 V-3 dk kaplama koþullarýnda -805 mV olarak belirlenmiþtir. En düþük korozyon akýmý yoðunluðu (9.8.10-7 A∙cm-2) ve korozyon hýzý (0.011 mm∙y-1) 5 V-3 dk kaplama koþullarýnda elde edilmiþtir.

Investigation of the corrosion properties of AA5754 aluminum alloy coated with graphene oxide by the electrophoretic deposition method

This study aims to coat the aluminum alloy (AA5754) with graphene oxide by electrophoretic deposition (EPD) method, which is a cheap, eco-friendly, and straightforward process, and to determine the effect of the coating on the corrosion behavior of the aluminum alloy. The graphene oxide coatings were characterized using x-ray diffraction (XRD), light microscopy, and scanning electron microscopy (SEM). It was determined that the graphene oxide coatings grew layer by layer and their thickness increased with increasing duration and applied potential. The effect of graphene oxide coating on the corrosion behavior of AA5754 aluminum alloy was investigated by a potentiodynamic method in 3.5% NaCl environment. According to corrosion test results, it was determined that the corrosion potential of the coated AA5754 aluminum alloy changed positively, while the corrosion current and corrosion rate decreased. The highest corrosion potential was determined as -805 mV at 5 V-5 min and 7 V-3 min coating conditions. The lowest corrosion current density (9.8.10-7 A∙cm-2), and corrosion rate (0.011 mm∙y-1) were obtained at 5 V-3 min coating conditions.