PhD student , North West University, South Africa
Some carbazole derivatives were explored to ascertain their corrosion inhibition strengths for steel
Some derivatives of carbazole were expanded using electrochemical techniques, weight loss, surface morphology, quantum chemical calculations and molecular dynamics simulations in order to mitigate corrosion caused by microbes (microbial induced corrosion) and aqueous acid. The threats posed by aqueous acid and microbes such especially sulphate reducing bacteria remain a huge challenge to oil and gas industry, sewage treatment plants, water treatment facilities and petrochemical plants. Past studies have treated the two forms of corrosion separately whereas both share somewhat similarities. Owing to depleting natural resources and the need to cut cost by industries, this research utilizes smart means to provide industries with chemicals that could be used as additives in paints and electroplating to minimize loss to industrial steel components.
Abstract: Five selected carbazole derivatives, namely carbazole, 3,6-dibromocarbazole, 2-hydroxycarbazole, 1,2,3,4-tetrahydrocarbazole and 9-(2-ethylhexyl)carbazole-3,6-dicarboxaldehyde were investigated for their inhibitive effects on Desulfovibrio vulgaris (D. vulgaris) induced corrosion of mild steel and in 1 M HCl medium using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The carbazole derivatives were found to be mixed type inhibitors with predominantly cathodic inhibitive effects for mild steel in 1 M HCl. Surface morphology results showed the compounds formed adsorbed film on mild steel surface in both aqueous acid and sulphate reducing bacteria (SRB) media. Quantum chemical calculations were used to provide molecular based explanations for the inhibitive effects of the compounds. The interactions of the molecules with mild steel surface was simulated based on molecular dynamic simulations approach using Fe(110) crystal surface as representative metallic surface.
Pub.: 28 May '17, Pinned: 20 Jul '17
Join Sparrho today to stay on top of science
Discover, organise and share research that matters to you