Ilim, Ilim and Bahri, Syaiful and Simanjuntak, Wasinton and Syah, Yana Maolana and Bundjali, Bunbun and Buchari, Buchari (2017) Performance of oligomer 4-vinylpiperidine as a carbon dioxide corrosion inhibitor of mild steel. Journal of Materials and Environmental Sciences, 08 (07). pp. 2381-2390. ISSN 2028-2508

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Abstract

Oligomer of 4-vinylpiperidine, O(4-VPP), synthesized by hydrogenation of oligomer 4-vinylpyridine, O(4-VP), was tested as a corrosion inhibitor to protect mild steel in brine solution saturated by carbon dioxide (CO2). Weight loss (wheel test), electrochemical impedance spectroscopy (EIS), and linear polarization (LP) measurements were used to determine the corrosion rates and the efficacies of the synthesized O(4-VPP). Weight loss experiments were carried out at temperature of 50 oC, in two different conditions, i.e without and with kerosene addition, while the other two techniques were applied only in brine solution without kerosene. Weight loss experiments demonstrated that the % protections of the synthesized inhibitor with the concentration of 10 mg L-1 are 62.7±9.9 % in the absence of kerosene, and 58.1±1.6 % in the presence of kerosene. Based on the significant test, % protections of O(4-VPP) in brine solution with and without kerosene are not significantly different. EIS experiments were carried out at fixed temperature of 70 oC, and the results indicate that addition of 1 mg L-1 of O(4-VPP) to brine solution led to increased charge transfer (Rct) from 21.8 Ω cm2 to 49.9 Ω cm2, and with addition of 2 mg L-1 led to increased Rct up to 90.9 Ω cm2, confirming the ability of the inhibitor to significantly decrease the corrosion rate of the mild steel investigated. To assess the effect of temperatures, the LP experiments were run at different temperatures of 30, 50, and 70 oC in the concentration range of inhibitor from 0 to 20 mg L-1. The results demonstrated that the higher the temperature and concentration, the higher the protection exhibited by the inhibitor suggesting that the inhibitor of O(4-VPP) was adsorbed onto surface of the mild steel through chemisorption supported by the adsorption thermodynamic parameters.

Item Type:	Article
Subjects:	Q Science > QD Chemistry
Divisions:	Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) > Prodi Kimia
Depositing User:	ILIM
Date Deposited:	30 Oct 2017 04:58
Last Modified:	31 Oct 2017 07:15
URI:	http://repository.lppm.unila.ac.id/id/eprint/4104

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