4.4 Article

Synthesis, Experimental and DFT Studies of Some Benzotriazole Derivatives as Brass C68700 Corrosion Inhibitors in NaCl 3 %

Journal

CHEMISTRYSELECT
Volume 6, Issue 6, Pages 1378-1384

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.202004383

Keywords

Brass C68700; BTA; DFT; Corrosion inhibition; Polarization

Funding

  1. Ministry of Higher Education and Scientific Research of the Algerian Government [A16 N01UN210120190005]

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The three synthesized benzotriazole derivatives show good inhibition potential for brass in a 3% NaCl solution, acting as mixed-type inhibitors. The inhibition efficiency increases with the concentration of inhibitors, reaching high levels for all three compounds. Additionally, the calculated DFT descriptors are consistent with the experimental inhibition efficiencies.
Corrosion inhibition potential of three synthesized benzotriazole (BTA) derivatives namely, 1-(prop-2-yn-1-yl)-1H-benzotriazole (Inh 1), 2-[2-(1H-benzotriazol-1-yl)ethyl]-1H-isoindole-1,3(2H)-dione (Inh 2) and 1-(4-nitrobenzyl)-1H-1,2,3-benzotriazole (Inh 3), on brass C68700 in NaCl 3 % was evaluated using potentiodynamic method. The results show that the examined molecules are good inhibitors for brass and behave as mixed type inhibitors. Inhibition efficiency (IE %) increases with the inhibitors concentration to reach 80.89 %, 83.70 % and 92.13 % at 15 ppm for Inh 1, Inh 2 and Inh 3 respectively. Additionally, the calculated DFT descriptors are in good agreement with the experimental inhibition efficiencies.

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