Electrochemical Studies on the Effect of Concentration on the Polyvinylpyrrolidone-Cysteine Inhibition Efficiency in an Acidic Solution

C. K. Nsakabwebwe*, M. E. Makhatha, A. D. Baruwa, E. T. Akinlabi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This paper studies the inhibition efficiency of mild steel in 1 molar hydrochloric acid in the presence and absence of an inhibitor by means of potentiodynamic polarization and electrochemical impedance spectroscopy. The immersion time and temperature were 3 h and 25 °C, respectively. The inhibitor concentration was 25, 100, 300, 500 and 700 ppm, respectively. The results of the two analyses exhibited a maximum efficiency at 700 ppm concentration and a constant exposure time. The potentiodynamic polarization results demonstrated that the polymer composite assured both the anodic and cathodic protection of the mild steel. The electrochemistry equivalent circuit fitted around a simplified R1 + R2/Q2 circuit derived from the electrochemical impedance spectroscopy data and the Randles equivalent cell.

Original languageEnglish
Title of host publicationAdvances in Material Science and Engineering
Subtitle of host publicationSelected Articles from ICMMPE 2021
EditorsSeyed Sattar Emamian, Mokhtar Awang, Jeeferie Abd Razak, Patrick J. Masset
Place of PublicationSingapore
Number of pages9
ISBN (Electronic)9789811933073
ISBN (Print)9789811933066
Publication statusPublished - 2023
Externally publishedYes
Event7th International Conference on Mechanical, Manufacturing and Plant Engineering, ICMMPE 2021 - Virtual, Online
Duration: 29 Nov 202129 Nov 2021

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364


Conference7th International Conference on Mechanical, Manufacturing and Plant Engineering, ICMMPE 2021
CityVirtual, Online

Cite this