Fatma KAYA, Ramazan SOLMAZ, İbrahim Halil GEÇİBESLER

Rheum Ribes (Işgın) Özütlerinin Asidik Ortamda Bakırın Korunması için Kullanılması

Bu çalışmada, ışgının çiçek (RRF), yaprak (RRL) ve kök (RRR) gibi farklı bölgelerinin ayrı ayrı özütleri hazırlanarak asidik ortamda bakırın korozyonuna koruma etkileri incelenmiştir. Böylelikle ışgının kullanılmayan diğer kısımlarının da faydaya dönüştürülmesi mümkün olabilecektir. Bu amaçla, RR özütlerinin 1 M HCl çözeltisinde 1000 ppm çözeltileri hazırlanmıştır. Bakır metalinin bu çözeltilerdeki elektrokimyasal davranışları açık devre potansiyelinin zamanla değişimi (Eocp-t), elektrokimyasal impedans spektroskopisi (EIS), lineer polarizasyon direnci (LPR) ve potansiyodinamik polarizasyon (PP) teknikleri ile incelenmiştir. Bakırın korozif ortam ile muamelesi sonrasında yüzeyi taramalı elektron mikroskopu (SEM), enerji dağılımlı X-ışını spektroskopisi (EDX) ve temas açısı ölçümleri ile incelenmiştir. Elde edilen bulgular, RR’nin farklı bölgelerinden elde edilen özütlerin bakırın asidik ortamdaki davranışına etkilerinin farklı olduğunu göstermiştir. En iyi koruma RRF özütünde elde edilmiştir. RRR özütü ise bakırı 1 M HCl çözeltisinde korozyona karşı koruyamamaktadır. Yüzey analizleri bitki özütlerinin metal yüzeyinde koruyucu bir film oluşturduğunu göstermiştir.

Anahtar Kelimeler:

Rheum Ribes (Işgın), Bakır, Doğal bitki özütleri, Korozyon inhibitörü

The Use of Rheum Ribes (Işgın) Extracts for Copper Protection in Acidic Media

The extracts of different parts of ışgın such as flower (RRF), leaf (RRL), and root (RRR) were prepared and their protective effects on copper corrosion in an acidic media were investigated in this study. Other components that are not currently in use will thus be able to be transformed into benefits. Extracts from various parts of the plant were dissolved in a 1 M HCl solution at a concentration of 1000 ppm for this purpose. The time variation of open circuit potential (Eocp-t), linear polarisation resistance (LPR), electrochemical impedance spectroscopy (EIS), and potentiodynamic polarisation (PP) techniques were used to investigate the electrochemical behaviour of copper metal in these solutions. The surface of copper was examined after corrosive medium treatment using a scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), and contact angle measurements. The results revealed that the effects of extracts obtained from different parts of the RR on the behavior of copper in an acidic medium varied. The best protection was provided by the RRF extract. Despite this, RRR extract failed to protect Cu from corrosive ions in 1 M HCl solution. According to surface analyses, the plant extracts formed an adherent and compact organic film on the Cu surface.

Keywords:

Rheum Ribes (Işgın), Copper, Natural plant extracts, Corrosion inhibitor,

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