Effect of hyamine on electrochemical behaviour of brass alloy in HNO3 solution

Küçük Resim Yok

Tarih

2013

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

SPRINGER INTERNATIONAL PUBLISHING AG

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

The electrochemical behaviours of a brass alloy in 0.1 M nitric acid, including the hyamine inhibitor with concentrations between 2.5 x 10(-4) M and 1.0 x 10(-5) M, were studied. For this purpose, potentiodynamic polarisation, electrochemical impedance spectroscopy (EIS), linear polarisation resistance (LPR) techniques, and flame atomic absorption spectroscopy (FAAS) were utilised. The inhibitor molecules adsorbed on the brass surface were calculated to be in good agreement with the Langmuir adsorption isotherm and the standard free enthalpy of adsorption (Delta G (ads) (a similar to) ). Hyamine effectively improved the corrosion inhibition of brass and acted as a mixed-type inhibitor on alloy surfaces. The surface morphology of the alloy was also clarified by optical microscopic and SEM techniques. A theoretical study of the corrosion inhibition efficiency of hyamine molecule was carried out using density functional theory (DFT) at the B3LYP/6-311G(d,p) basis set level. (C) 2012 Institute of Chemistry, Slovak Academy of Sciences

Açıklama

Anahtar Kelimeler

electrochemical techniques, computational techniques, dezincification, acid corrosion inhibitor, brass

Kaynak

CHEMICAL PAPERS

WoS Q Değeri

Q3

Scopus Q Değeri

Q2

Cilt

67

Sayı

2

Künye