Elektroforetik biriktirme yöntemi ile grafen oksit kaplanmış AA5754 alüminyum alaşımının korozyon özelliklerinin incelenmesi

Öz

Bu çalışma, ucuz, çevre dostu ve basit bir işlem olan elektroforetik biriktirme (EPD) yöntemiyle, alüminyum alaşımını (AA5754) grafen oksit ile kaplamayı ve kaplamanın alüminyumun korozyon özelliği üzerindeki etkisini belirlemeyi amaçlamaktadır. Grafen oksit kaplamalar, X-ışını kırınımı (XRD), optik mikroskop ve taramalı elektron mikroskobu (SEM) kullanılarak karakterize edilmiştir. Grafen oksit kaplamaların katman katman büyüdüğü ve artan süre ve uygulanan potansiyel ile kalınlıklarının arttığı belirlenmiştir. Grafen oksit kaplamanın AA5754 alüminyum alaşımının korozyon özelliği üzerindeki etkisi, ağırlıkça %3.5 NaCl ortamında potansiyodinamik yöntemle araştırılmıştır. Korozyon test sonuçlarına göre, kaplanmış AA5754 alüminyum alaşımının korozyon potansiyelinin olumlu yönde değiştiği, korozyon akımının ve korozyon hızının ise azaldığı tespit edilmiştir. En yüksek korozyon potansiyeli 5 V-5 dk ve 7 V-3 dk. kaplama koşullarında -805 mV olarak belirlenmiştir. En düşük korozyon akımı yoğunluğu (9.8.10-7 A∙cm-2) ve korozyon hızı (0.011 mm∙y-1) 5 V-3 dk. kaplama koşullarında elde edilmiştir.

Anahtar Kelimeler

• Grafen oksit
• Alüminyum
• Elektroforetik biriktirme
• Korozyon
• Kaplama

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

Abstract

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 properties of the aluminum alloy. The graphene oxide coatings were characterized by X-ray diffraction (XRD), optical microscopy, and scanning electron microscopy (SEM). It was determined that the graphene oxide coatings grew layer by layer and their thickness increased with increasing time and applied potential. The effect of graphene oxide coating on the corrosion properties 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.

Keywords

• Graphene oxide
• Aluminum
• Electrophoretic deposition
• Corrosion
• Coating

Kaynakça

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