Synthesis, Characterization and Corrosion Inhibition Study On 2-Chloroacetophenone 4-Ethyl-3-Thiosemicarbazone: Weight Loss and DFT Methods

Title : Synthesis, Characterization and Corrosion Inhibition Study On 2-Chloroacetophenone 4-Ethyl-3-Thiosemicarbazone: Weight Loss and DFT Methods

Abstract:

Corrosion is a process of continual deterioration of metals caused by the action of the corrosive medium. Mild steel is often used as a construction material in the industry because of its relatively low price. However, it has low corrosion resistance, therefore some form of a protective film should be applied to prevent it from rusting in the corrosive environment. Therefore, a corrosion inhibitor is used to overcome the corrosion problem. Thiosemicarbazone derivative is one of the Schiff base ligands that can inhibit corrosion due to the presence of electronegative atoms such as N, S, and π electrons that can cause an efficient adsorption action on the mild steel surface. This research aims to synthesise a thiosemicarbazone ligand derived from 2-chloroacetophenone and 4-ethyl-3-thiosemicarbazide, namely as 2-chloroacetophenone 4-ethyl-3-thiosemicarbazone (2ClAcTSC). The structure of 2ClAcTSC was confirmed using an elemental analyser, UV-Vis, NMR and ATR-FTIR. The inhibitive effects of 2ClAcTSC were studied on mild steel in 1 M hydrochloric acid (HCl) and sulfuric acid (H₂SO₄) by using the weight loss method and Scanning Electron Microscopy (SEM). It was found that the 2ClAcTSC has better effectiveness in HCl rather than H₂SO₄ solution. Moreover, the inhibition efficiency increases as the inhibitor concentration increases. The SEM results verified that the inhibitor had been adsorbed on the mild steel surface to form a protective layer. DFT computations are performed to correlate inhibitor efficiency with intrinsic molecular parameters. The study revealed that the results obtained are consistent with the experimental data reported.

Audience take-away:

• Introduction of thiosemicarbazone derivatives that have potential to be applied in various fields.
• The thiosemicarbazone derivatives potential to coordinate with metal ions to form complexes.
• The properties of thiosemicarbazone derivatives potential to be explored using computational method.

Biography:

Dr. Nur Nadia Dzulkifli studied Chemistry by Research (Inorganic Chemistry) at Universiti Kebangsaan Malaysia as Ph.D. student in 2018.  Her research group is called as MaterInOleo Research Group (Material Science, Oleochemistry, and Inorganic Chemistry). She is currently working as a Senior Lecturer at Universiti Teknologi MARA, Negeri Sembilan Branch. Her research field is mainly in corrosion study and inorganic chemistry. Besides that, she is planning to expand her research into DFT study and Material Science.