Allylphenoxypiperidinium halides as corrosion inhibitors of carbon steel and biocides

Abstract

A series of 1-(4-(2-allylphenoxy)butyl)piperidin-1-ium halides (4a-d) was synthesized and characterized via spectroscopic methods (FTIR, 1 H NMR). The corrosion inhibition of the synthesized halides on carbon steel in water-salt-hydrocarbon environment, saturated with H2 S, was investigated. For this purpose, a series of techniques such as gravimetric measurement, potentiodynamic polarisation, and scanning electron microscope (SEM) were used and some thermodynamic parameters of corrosion process (Δ G ads. , ΔH 0 ads. , Δ S 0 ads. ) were evaluated. The steel surface was checked by SEM, and the steel surface showed good surface coverage. The results showed that the synthesized compounds at the concentrations 125, 150 mg ×L -1 have corrosion inhibition activity of 78%–95% by gravimetric measurements and 81%–92% by potentiodynamic measurements at 100, 150 mg ×L -1 . The biological activity was examined against sulphate-reducing bacteria (SRB). It was revealed that at the concentration of compounds 4c and 4d, 100 mg ×L -1 , the antibacterial activity was 100%.

Study of the Condensation Reaction of 2-Allylphenol With Formaldehyde and Methylamine and the Functional Properties of the Obtained Products

“…Phenol derivatives containing various functional groups and heteroatoms in their structures are relevant and promising both in theoretical and applied terms [1][2][3][4][5]. They can be used in various fields of technology as antioxidant, anticorrosive, antimicrobial additives to oils and fuels, stabilizers of polymeric materials, analytical reagents, etc.…”