Asidik ortamda paslanmaz çeliğin korozyonuna yeşil inhibitör olan Nikotinamidin etkisi

Year 2023, Volume: 38 Issue: 3, 1431 - 1438, 06.01.2023

Gülden Asan

https://doi.org/10.17341/gazimmfd.1064200

Abstract

Paslanmaz çelik tüm dünyada en çok kullanılan metal olarak karşımıza çıkmaktadır. Çeliğin asidik ortamda korozyon direnci düşük olduğu için ve endüstride asit kullanımı çok yaygın olduğundan çeliğin korozyondan korunması önem arz etmektedir. Bu çalışmada inhibitör olarak çevre dostu olan nikotinamid bileşiği çeliğin korozyondan korunmasında kullanıldı. Çalışma da öncelikle çeliğin 0,1 M HCl asit çözeltisinde elektrokimyasal davranışını belirlemek için dönüşümlü voltametri teğniği kullanıldı. Daha sonra 0,1 M HCl asit çözeltisinde Tafel polarizasyon yöntemi nikotinamid inhibitörü olmadığında, 500 ppm, 750 ppm ve 1000 ppm nikotinamid varlığında çeliğin korozyon davranışını tayin etmek için uygulandı. Bu 3 farklı derişimde inhibitör 0, 15, 30, 45 ve 60 dakikalık sürelerde bekletilerek her bir derişim için optimum süre tayini yapıldı. En yüksek inhibitör etkinliği 1000 ppm nikotinamid derişiminde 15 dakikalık bekletme süresinde % 96,8, süre kısıtlaması olmadığında 500 ppm nikotinamid derişiminde 60 dakikalık bekletme süresinde inhibitör etkinliği % 96,6 olarak bulundu. Elde edilen sonuçlar gösterdi ki nikotinamid paslanmaz çeliğin korozyondan korunmasında etkin bir şekilde kullanılabilir ve çevre dostu olması sebebiyle de korozyondan korunma sağlanırken çevreye ve canlılara zarar verilmemiş olur.

Keywords

Paslanmaz çelik, korozyon, tafel polarizasyonu, nikotinamid, inhibitör.

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