Bakırın Asidik Ortamdaki Korozyonuna Hurma (Phoenix dactylifera) Çekirdeğinin İnhibisyon Etkisinin İncelenmesi
İnhibitör kullanımı, metalik malzemeleri korozyondan korumak için tercih edilen en yaygın yöntemlerden bir tanesidir. Korozyon inhibitörü olarak organik maddeler yaygın olarak kullanılmaktadır. Bununla birlikte bu tür maddelerin yüksek maliyetleri ve toksik özellikleri kullanımlarını kısıtlar. Yapılan son çalışmalar, çevre dostu doğal ürünler ya da bu ürünlerden elde edilen atıkların korozyon inhibitörü olarak kullanılabildiklerini göstermektedir. Bu çalışmada, çevre dostu doğal bir atık olan Hurma (Phoenix dactylifera) çekirdeği ekstresinin (PDSE) bakırın 0,5 M H2SO4 çözeltisindeki korozyonuna inhibisyon etkisi araştırılmıştır. Bu amaçla, açık devre potansiyelinin zamanla değişimi (Eocp-t), lineer polarizasyon direnci (LPR), elektrokimyasal impedans spektroskopisi (EIS) ve potansiyodinamik polarizasyon (PP) teknikleri kullanılmıştır. İnhibitörlü ortamda bekletilen bakırın yüzeyi SEM ve temas açısı kullanılarak karakterize edilmiştir. İnhibitör içeren ortamda bakırın yüzey yükü, sıfır yük potansiyeli (PZC) tekniği ile belirlenmiş ve bir adsorpsiyon mekanizması önerilmiştir. Sonuçlar, PDSE’nin 0,5 M H2SO4 çözeltisinde bakırın korozyonunu yavaşlattığını göstermiştir
Investigation of the Inhibition Effect of Palm (Phoenix dactylifera) Seed to the Corrosion of Copper
The use of inhibitors is one of the most common methods preferred to protect metallic materials from corrosion. Organic substances as the corrosion inhibitors are widely used. However, high costs and toxic properties of organic substances restrict their use. Recent studies show that the wastes obtained from environmentally friendly natural products or products can be used as corrosion inhibitors. In this study, the inhibition of the effect of palm (phoenix dactylifera) seed (PDSE), which is an eco-friendly natural waste, on the corrosion of copper in 0.5 M H2SO4 solution was investigated. For this aim, the change of open circuit potential as a function of exposure time (Eocp-t), linear polarization resistance (LPR), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PP) techniques were used. The surface of copper, which was exposed to the inhibited media was characterized by the SEM and contact angle measurements. The surface charge of copper in the inhibitor containing solution was determined by zero charge potential (PZC) technique and an adsorption mechanism was proposed. The results showed that PDSE slow the corrosion rate of copper in 0.5 M H2SO4 solution.
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