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Volume 46, Issue 2
1 April 1999
Anti-Corrosion Methods and Materials Cover Image for Volume 46, Issue 2
Editors
Yu Yan
Yu Yan
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Article Contents
Research Article| April 01 1999

Mechanism of inhibition of corrosion of mild steel by polyacrylamide, phenyl phosphonate and Zn2+ Available to Purchase

Susai Rajendran;
Susai Rajendran
Susai Rajendran is Professor of Chemistry in the Department of Chemistry, GTN Arts College, Dindigul, India
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B.V. Apparao;
B.V. Apparao
B.V. Apparao is at the Department of Chemistry, Regional Engineering College, Warangal, India
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N. Palaniswamy
N. Palaniswamy
N. Palaniswamy is at the Central Electrochemical Research Institute, Karaikudi, India
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Author & Article Information
Publisher: Emerald Publishing
Online ISSN: 1758-4221
Print ISSN: 0003-5599
© MCB UP Limited
1999
Anti-Corrosion Methods and Materials (1999) 46 (2): 111–116.
https://doi.org/10.1108/00035599910263288

The formulation consisting of 50ppm polyacrylamide (PAA), 300ppm phenyl phosphonic acid (PPA) and 50ppm Zn2+ has 95 per cent inhibition efficiency in controlling corrosion of mild steel in a neutral aqueous environment, containing 60ppm Cl—, a situation commonly encountered in cooling water systems. A discussion of mechanistic aspects of corrosion inhibition is based on the results obtained from a potentiostatic polarization study, UV‐visible, FTIR and luminescence spectra. The protective film is found to be luminescent and to consist of Fe2+‐PAA complex, Fe2+‐PPA complex and Zn(OH)2.

Keywords:
Corrosion, Corrosion inhibitors, Mild steel
© MCB UP Limited
1999
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