Düşük Karbonlu Çeliğin Korozyon Davranışına Hekzametilen Tetra Amin’in Etkisi

Yıl 2017, Cilt: 29 Sayı: 2, 147 - 153, 01.10.2017

Reşit Yıldız

Öz

Bu çalışmada
düşük karbonlu çeliğin (DKÇ) asidik ortamındaki korozyon davranışına
hekzametilen tetra âmin’in (HMTA) inhibitör etkisi araştırılmıştır.
Elektrokimyasal teknikler ve kuantum kimyasal hesaplamalar uygulanmıştır. Elde
edilen sonuçlara göre; HMTA’nın inhibisyon etkinliği artan HMTA derişimi ile
artış göstermiştir. 10 mM HMTA içeren 0,1 M HCl çözeltisinde inhibisyon
etkinliği %93,6 olarak tespit edilmiştir. Yüksek inhibisyon etkinliği, teorik
olarak belirlenen yüksek HOMO (en yüksek enerjili dolu moleküler orbital
enerjisi) enerjisi (-6,203 eV) ve düşük LUMO (en düşük enerjili boş moleküler
orbital enerjisi)  enerjisi (-0,346 eV) ile ilişkilendirilmiştir. HMTA’in
yumuşak çelik yüzeyine adsorpsiyonunun Langmuir adsorpsiyon izotermine uyduğu
tespit edilmiştir. HTMA’in inhibisyon etkinliği, inhibitör moleküllerinin metal
yüzeyine adsorplanarak koruyucu bir film oluşturması ile açıklanabilir.

Anahtar Kelimeler

Korozyon, Düşük karbon çelik, SEM

Kaynakça

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