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KG Chandrappa
HP Sachin
SB Abd Hamid
Narayana Hebbar
BM Prasanna*
TV Venkatesha
BM Praveen
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KG Chandrappa
HP Sachin
SB Abd Hamid
Narayana Hebbar
BM Prasanna*
TV Venkatesha
BM Praveen
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International Research Journal of Chemistry and Chemical Sciences

The inhibition effect of hydralazine hydrochloride on corrosion of mild steel in hydrochloric acid solution

BM Prasanna*, BM Praveen, Narayana Hebbar, TV Venkatesha, HP Sachin, KG Chandrappa and SB Abd Hamid

Accepted 28 May, 2015. 

Citation: Prasanna BM, Praveen BM, Hebbar N, Venkatesha TV, Sachin HP, Chandrappa KG, Abd Hamid SB (2015). The inhibition effect of hydralazine hydrochloride on corrosion of mild steel in hydrochloric acid solution. International Research Journal of Chemistry and Chemical Sciences, 2(2): 021-024.

Copyright: © 2015 Prasanna et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Abstract 

The inhibition effect of the Hydralazine hydrochloride for mild steel corrosion in 1M HCl has been investigated. Polarization measurement indicates that the Hydralazine hydrochloride act as mixed-type inhibitor, which gives a maximum inhibition efficiency around 72 %. Electrochemical impedance spectroscopy was used to investigate the mechanism of corrosion inhibition gives around 76 % due to the formation of electrical double layer. Thermodynamic parameter such as ΔG0 ads value was obtained as -30.22 KJ/mol indications that inhibitor shows its inhibition effect due to the chemisorptions process. Scanning electron microscopic images gives a visual idea about the formation of the protective film on the mild steel surface to reduce the corrosion rate. So that the Hydralazine hydrochloride acts as an efficient mixed type corrosion inhibitor for mild steel corrosion in acid media.

Keywords: Hydralazine hydrochloride, mild steel, inhibitor, EIS, SEM, adsorption isotherm