The Corrosion Behavior of Mild Steel

Year 2017, Volume: 32 Issue: 2, 145 - 152, 15.06.2017

Başak Doğru Mert

https://doi.org/10.21605/cukurovaummfd.358404

Cited By: 2

Abstract

In this study, the inhibition effect of 3-aminomethyl pyridine (3AMP) on mild steel corrosion behavior in
acidic medium is investigated. The electrochemical techniques (electrochemical impedance spectroscopy
and polarization measurements) and quantum chemical calculations were obtained. The results showed
that; inhibition efficiencies increase with increasing concentration of 3AMP. The inhibition efficiency is
97% in 50 mM 3AMP containing 0.5 M HCl solution. It is found that 3AMP retards both anodic and
cathodic reactions according to polarization measurements. The high inhibition efficiency of 3AMP is
attributed to the high value of EHOMO (-6.937 eV), dipole moment μ (2.473 D) and low value of
ELUMO (-1.049 eV). According to calculated Mulliken charges; the adsorption of 3AMP may be
occurred on amine and/N terminal of molecule.

Keywords

Corrosion, Mild steel, 3-aminomethyl pyridine

Yumuşak Çeliğin Korozyon Davranışı

Abstract

Bu çalışmada yumuşak çeliğin (YÇ) asidik ortamındaki korozyon davranışına 3-Amino metil piridin’in
(3AMP) inhibitör etkisi araştırılmıştır. Elektrokimyasal teknikler (elektrokimyasal impedans
spektroskopisi ve polarizasyon ölçümleri) ve kuantum kimyasal hesaplamalar uygulanmıştır. Elde edilen
sonuçlara göre; 3AMP’nin inhibisyon etkinliği artan 3AMP derişimi ile artış göstermiştir. 50 mM 3AMP
içeren 0,5 M HCl çözeltisinde inhibisyon etkinliği %97 olarak tespit edilmiştir. Polarizasyon ölçümleri
3AMP’nin hem katodik hem de anodik reaksiyonların hızını azalttığını göstermektedir. Yüksek
inhibisyon etkinliği, teorik olarak belirlenen yüksek HOMO enerjisi (-6,937 eV), dipol momenti
(2,473 D) ve düşük LUMO enerjisi (-1,05 eV) ile ilişkilendirilmiştir. Belirlenen Mulliken yüklere göre;
N atomları üzerindeki negatif yük sebebiyle 3AMP’nin yumuşak çelik yüzeyine adsorpsiyonunun amin
ve/veya N ucundan gerçekleşebileceği düşünülmektedir.

Keywords

Korozyon, Yumuşak çelik, 3-Amino metil piridin

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