Peningkatan perencat kakisan menggunakan tanin tertulen dalam medium HCL

Translated title of the contribution: Enhanced corrosion inhibition using purified tannin in HCL medium

Hatika Kaco, Nur Atiqah Abu Talib, Sarani Zakaria, Sharifah Nabihah Syed Jaafar, Norinsan Kamil Othman, Chin Hua Chia, Sinyee Gan

Research output: Contribution to journalArticle

Abstract

Tannin was successfully extracted from Gelam bark using acetone as the solvent as natural alternatives. The extracted tannin was then used as corrosion inhibitor for mild steel under acidic medium. The gravimetric and electrochemical potentiodynamic corrosion tests were executed at different purified and unpurified tannin concentrations (200-800 ppm) to test the ability to inhibit mild steel corrosion. The results showed that the corrosion rate decreased as tannin concentration increased while the inhibition efficiency increased. The isotherm adsorption found that the Langmuir model was the best model to represent the interaction of tannin inhibitor and the active sites on mild steel surface. The SEM analysis showed that the mild steel morphology changed after the addition of tannin. The presence of blue-black color on the mild steel surface indicated the formation of ferric tannate to protect the surface of mild steel. In conclusion, purified tannin was a better inhibitor compared to unpurified tannin on mild steel in 1 M HCl.

Original languageMalay
Pages (from-to)931-942
Number of pages12
JournalMalaysian Journal of Analytical Sciences
Volume22
Issue number6
DOIs
Publication statusPublished - 1 Dec 2018

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Tannins
Carbon steel
Corrosion
Steel corrosion
Corrosion inhibitors
Acetone
Corrosion rate
Adsorption isotherms
Color
Scanning electron microscopy

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Peningkatan perencat kakisan menggunakan tanin tertulen dalam medium HCL. / Kaco, Hatika; Talib, Nur Atiqah Abu; Zakaria, Sarani; Syed Jaafar, Sharifah Nabihah; Othman, Norinsan Kamil; Chia, Chin Hua; Gan, Sinyee.

In: Malaysian Journal of Analytical Sciences, Vol. 22, No. 6, 01.12.2018, p. 931-942.

Research output: Contribution to journalArticle

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AU - Kaco, Hatika

AU - Talib, Nur Atiqah Abu

AU - Zakaria, Sarani

AU - Syed Jaafar, Sharifah Nabihah

AU - Othman, Norinsan Kamil

AU - Chia, Chin Hua

AU - Gan, Sinyee

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AB - Tannin was successfully extracted from Gelam bark using acetone as the solvent as natural alternatives. The extracted tannin was then used as corrosion inhibitor for mild steel under acidic medium. The gravimetric and electrochemical potentiodynamic corrosion tests were executed at different purified and unpurified tannin concentrations (200-800 ppm) to test the ability to inhibit mild steel corrosion. The results showed that the corrosion rate decreased as tannin concentration increased while the inhibition efficiency increased. The isotherm adsorption found that the Langmuir model was the best model to represent the interaction of tannin inhibitor and the active sites on mild steel surface. The SEM analysis showed that the mild steel morphology changed after the addition of tannin. The presence of blue-black color on the mild steel surface indicated the formation of ferric tannate to protect the surface of mild steel. In conclusion, purified tannin was a better inhibitor compared to unpurified tannin on mild steel in 1 M HCl.

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