Synthesis, structural, density functional theory, and x-ray diffraction study of zn(II) n-isopropylbenzyldithiocarbamate: anti-corrosion screening in acid media

• Main Authors: Habdul Latif, Noor Syafiqah, Sheikh Mohd Ghazali, Sheikh Ahmad Izaddin, Abdullah, Erna Normaya, Lahuri, Azizul Hakim, Ngatiman, Mohammad Fadzlee, Dzulkifl, Nur Nadia
• Format: Article
• Language: English
• Published: Universitas Gadjah Mada 2018
• Online Access: http://psasir.upm.edu.my/id/eprint/74071/1/Synthesis%2C%20structural%2C%20density%20functional%20theory%2C%20and%20x-ray%20diffraction%20study%20of%20zn%28II%29%20n-isopropylbenzyldithiocarbamate%20anti-corrosion%20screening%20in%20acid%20media.pdf; http://psasir.upm.edu.my/id/eprint/74071/; https://jurnal.ugm.ac.id/ijc/article/view/34703/22087

Corrosion of metal is a serious issue across many industries and is considered costly. Acids used during the cleaning process in industries may contribute to metal erosion. Dithiocarbamate is a ligand that can act as a corrosion inhibitor due to the presence of sulfur and nitrogen as electronegative atoms. Zn(II) N-isopropylbenzyldithiocarbamate (Zn[N-isopbenzdtc]2) complex was synthesized through direct synthetic method of < 4 °C and characterized using Fourier Transform Infrared-Attenuated Total Reflectance (FTIR-ATR), Ultraviolet-Visible (UV-Vis), Nuclear Magnetic Resonance (NMR), X-ray crystallography study, molar conductivity, melting point, and gravimetric analysis. Corrosion inhibition of mild steel was studied for different corrosive media (1 M HCl and 1 M H2SO4). The synthesized inhibitor was studied at different concentrations of 1, 2, 3, 4, and 5 mM at 40 °C. As a conclusion, as the inhibitor concentration decreased, the efficiency of the corrosion inhibitor also decreased at a constant temperature. In this study, it showed that the corrosion activity of mild steel in 1 M H2SO4 was higher compared to 1 M HCl due to the higher concentration of H+, which makes H2SO4 more corrosive than HCl.