Corrosion Inhibition by an Aqueous Extract of Phyllanthus Amarus | Zendy

M. Sangeetha | Zendy; S. Rajendran | Zendy; J. Sathiyabama | Zendy; A. Krishnaveni | Zendy; P. Shanthy | Zendy; Nithil Harris Manimaran | Zendy; B. Shyamaladevi | Zendy

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Corrosion Inhibition by an Aqueous Extract of Phyllanthus Amarus

Author(s) -

M. Sangeetha,

S. Rajendran,

J. Sathiyabama,

A. Krishnaveni,

P. Shanthy,

Nithil Harris Manimaran,

B. Shyamaladevi

Publication year - 2011

Publication title -

portugaliae electrochimica acta

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.252

H-Index - 27

eISSN - 1647-1571

pISSN - 0872-1904

DOI - 10.4152/pea.201106429

Subject(s) - aqueous solution , phyllanthus , corrosion , aqueous extract , chemistry , materials science , metallurgy , traditional medicine , medicine , organic chemistry

The inhibition efficiency (IE) of phyllanthus amarus extract (PAE)-Zn 2+ system, in controlling corrosion of carbon steel in an aqueous solution containing 60 ppm of Cl - , has been evaluated by weight loss method. Weight loss study reveals that the formulation consisting of 2 mL of PAE and 25 ppm of Zn 2+ has 98% inhibition efficiency in controlling corrosion of carbon steel immersed in an aqueous solution containing 60 ppm of Cl - . Synergistic parameters suggest that a synergistic effect exists between PAE and Zn 2+ . Polarization study reveals that this system functions as mixed type of inhibitor controlling the cathodic reaction and anodic reaction to an equal extend. AC impedance spectra reveal that a protective film is formed on the metal surface. The FTIR spectra reveal that the protective film consists of Fe 2+ -phyllanthus complex.

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