Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/2029
Title: CORROSION INHIBITION OF N80 STEEL IN 15% HCL BY PYRAZOLONE DERIVATIVES: ELECTROCHEMICAL, SURFACE AND QUANTUM CHEMICAL STUDIES
Authors: K R, Ansari
M A, Quraishi
A, Singh
Ramkumar, Sowmya
I B, Obote
Issue Date: 4-Feb-2016
Publisher: Royal Society of Chemistry, RSC advances
Abstract: The corrosion protection of N80 steel in 15% HCl by two pyrazolone derivatives namely 2-(3-amino-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)(p-tolyl)methyl)malononitrile (PZ-1) and 2-((3-amino-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)(phenyl)methyl)malononitrile (PZ-2) has been investigated by using gravimetric, electrochemical and quantum chemical studies. The observed results reveal that PZ-1 is a better inhibitor than PZ-2. Tafel polarization showed that PZs are mixed type inhibitors but dominantly affect the cathodic reaction. Both inhibitors were found to obey the Langmuir adsorption isotherm. Scanning electron microscopy (SEM) and scanning electrochemical microscopy (SECM) images support the protection of the N80 steel in the presence of the PZs. Quantum chemical study reveals that both inhibitors have a tendency to get protonated and this result supports the experimental observations.
URI: https://doi.org/10.1039/C5RA25441H
http://localhost:8080/xmlui/handle/123456789/2029
ISSN: 2046-2069
Appears in Collections:International Journals



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