A COMBINED EXPERIMENTAL AND THEORETICAL INVESTIGATION ON PYRAZOLONE DERIVATIVE AS CORROSION INHIBITOR FOR MILD STEEL IN 0.5 M SULPHURIC ACID MEDIA (Article)

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Title:	A COMBINED EXPERIMENTAL AND THEORETICAL INVESTIGATION ON PYRAZOLONE DERIVATIVE AS CORROSION INHIBITOR FOR MILD STEEL IN 0.5 M SULPHURIC ACID MEDIA (Article)
Authors:	Nalini, D Kohilah, K S Sowmya, Ramkumar
Keywords:	Acid Corrosion mild steel pyrazolone theoretical studies sulphuric acid medium
Issue Date:	23-Apr-2014
Publisher:	Portugaliae Electrochimica Acta
Abstract:	The inhibition action of the Pyrazolone Derivative (PYR) on the corrosion of mild steel in 0.5 M sulphuric acid was investigated by weight loss, polarization, impedance and SEM. Results obtained revealed that PYR performed excellently as corrosion inhibitor with efficiency of 91% at 11 ppm at 298 K. Its adsorption on mild steel obeys Langmuir and Temkin isotherm. Polarization curves indicate that PYR behaves as mixed type. The value of ∆G ads indicates the spontaneous physisorption of PYR. The SEM results confirm the presence of a protective surface layer over the mild steel surface. The reactivity of the compound was analysed through theoretical calculation.
URI:	https://www.peacta.org/articles_upload/PEA_32_1_2014_109_123_.pdf
ISSN:	1647-1571
Appears in Collections:	k) 2014-Scopus Open Access (PDF)

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