Synergistic of a Coumarin Derivative with Potassium Iodide on the Corrosion Inhibition of Aluminum Alloy in 1.0 M H2SO4
Synergistic of a Coumarin Derivative with Potassium Iodide on the Corrosion Inhibition of Aluminum Alloy in 1.0 M H2SO4
Abu Bakar Mohamad(Universiti Kebangsaan Malaysia); Abdul Amir H. Kadhum(Universiti Kebangsaan Malaysia); Ahmed A. Al-Amiery(University of Technology); Lim Chai Ying(Universiti Kebangsaan Malaysia); Ahmed Y. Musa(The University of Western Ontario)
20권 3호, 459~467쪽
초록
Synergistic effects of the addition of KI on the corrosion inhibitive performance of a coumarin derivative on analuminum alloy in 1.0 M H2SO4 at different temperatures were studied using various electrochemicalmeasurements. Density functional theory was used to calculate the quantum chemical parameters of thecoumarin derivative. The experimental results showed that the coumarin derivative is considered as a mixedtypeinhibitor. The corrosion potential values were almost unchanged upon the addition of PBBC to the acidicsolution. The inhibition efficiency increases with increasing inhibitor concentration and increases further inthe presence of 6.02 mM KI but decreases significantly at higher temperature. The adsorption of PBBC obeyedthe Langmuir isotherm, and being chemically adsorbed at lower temperatures, while physical adsorption isfavoured at higher temperature. The theoretical results indicated that the coumarin derivative was adsorbedonto the surface of Al2024 through the sulfur, oxygen and nitrogen atoms.
Abstract
Synergistic effects of the addition of KI on the corrosion inhibitive performance of a coumarin derivative on analuminum alloy in 1.0 M H2SO4 at different temperatures were studied using various electrochemicalmeasurements. Density functional theory was used to calculate the quantum chemical parameters of thecoumarin derivative. The experimental results showed that the coumarin derivative is considered as a mixedtypeinhibitor. The corrosion potential values were almost unchanged upon the addition of PBBC to the acidicsolution. The inhibition efficiency increases with increasing inhibitor concentration and increases further inthe presence of 6.02 mM KI but decreases significantly at higher temperature. The adsorption of PBBC obeyedthe Langmuir isotherm, and being chemically adsorbed at lower temperatures, while physical adsorption isfavoured at higher temperature. The theoretical results indicated that the coumarin derivative was adsorbedonto the surface of Al2024 through the sulfur, oxygen and nitrogen atoms.
- 발행기관:
- 대한금속·재료학회
- 분류:
- 재료공학