Ilim, Ilim and Bahri, Syaiful and Marjunus, Roniyus and Simanjuntak, Wasinton and Rilyanti, Mita (2019) Comparative study of CO2 Corrosion inhibition of mild steel in brine solution by the oligomers of 2-vinylpyridine and 4-vinylpyridine. In: The 10th International Conference on Green Technology, 2-3 Oktober 2019, Malang. (Unpublished)

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ABSTRACT Comparative study on the use of oligomeric compounds, O(4-VP) and O(2-VP) as carbon dioxide corrosion inhibitors of mild steel was carried out. The oligomers were synthesized using hydrogen peroxide initiator. The performance of oligomers as inhibitor was evaluated by linear polarization resistance (LPR), carried out at varied inhibitor concentrations and temperatures. This study also studied the characteristics of the adsorption and protection mechanisms of each of the corrosion inhibitors tested. The experimental results demonstrated that O(4-VP) and O(2-VP) can decrease the corrosion rate of mild steels in corrosive solution, their protection abilities are better at higher concentration. The effect of temperature on these two types of oligomeric compounds is different, in which the corrosion protection of O(4-VP) increased with temperatures, suggesting that the oligomers were chemically adsorbed by the mild steel surface while for the oligomer of O(2-VP), the opposite is true which is related to physisorption. This is supported by thermodynamic quantities of each compound, especially Gads (about -40 kJ mol-1) and Hads (about 77 kJ mol-1) and the value of f and Kads decreases with increasing temperature for O(4-VP, while O(2-VP) has Gads (about -20 kJ mol-1) and Hads is negative. The more negative the value of Hads, the more physisorption and the more positive the value leads to chemisorption. Both 2-vinylpyridine and 4-vinylpyridine monomers give opposite results to their oligomers, in which the monomers exhibit no inhibition activity, instead they promoted the corrosion of the mild steel. Keywords: O(4-VP), O(2-VP), mild steel, corrosion inhibitor, CO2 corrosion

Item Type: Conference or Workshop Item (Speech)
Subjects: Q Science > QD Chemistry
Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) > Prodi Kimia
Depositing User: ILIM
Date Deposited: 07 Nov 2019 08:20
Last Modified: 07 Nov 2019 08:20

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