Studies on the Antibacterial Influence of Two Ionic Liquids and their Corrosion Inhibition Performance

Mohamed F Shehata,El-Sayed M Sherif,Ashraf M El-Shamy,Sherif Zein El Abedin,Khaled M Zohdy

doi:10.3390/app10041444

Mohamed F Shehata, El-Sayed M Sherif + Show 3 more

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https://doi.org/10.3390/app10041444

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Abstract

In this paper the anti-bacterial and the anti-corrosion effect of two different ionic liquids, namely 1-(2-hydroxyethyl)-3-methylimidazolinium chloride ([OH-EMIm]Cl) and 1-ethyl-3-methyleimidazolinium chloride ([EMIm]Cl) was demonstrated. The results revealed that the corrosion inhibition influence of the ionic liquid [OH-EMIm]Cl is higher than that of the ionic liquid [EMIm]Cl. Furthermore, the ionic liquid [OH-EMIm]Cl showed better biocidal influence compared with the ionic liquid [EMIm]Cl. This indicates the synergistic effect due to the incorporation of the hydroxyl group into the side chain of the imidazolium cation leading to enhanced antibacterial and anticorrosion effect.

Highlights

The corrosion is the main problem in cooling water systems
Enumeration of Bacteria most probable number (MPN) method was utilized for enumeration of bacteria
At a concentration of 100 ppm an inhibition efficiency of about 99.99% was obtained in one hour. These results indicate the bactericidal effect of ionic liquid [OH-EMIm]Cl and the inhibition efficiency were dependenton the ionic liquid concentration

Summary

Introduction

The corrosion is the main problem in cooling water systems. The corrosion may be metallic corrosion owing to the existence of water and/or microbial corrosion due to formation of bacterial biofilms [1]. Due to its cost-effectiveness, the mild steel is considered as an important construction material in industry. The mild steel has low corrosion resistance compared with other metallic materials [7]. Extensive work has been performed to mitigate the corrosion and microbial corrosion of mild steel using corrosion inhibitors and biocides, respectively [8]. The prevention of the formation of biofilms is dependent on destroying the microbial community, which can be achieved by controlling the environmental conditions such as pH, injected chemicals, and temperature [11]

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