Inhibitive behaviour of corrosion of aluminium alloy in NaCl by mangrove tannin

Anticorrosion potential of mangrove tannins on aluminium alloys AA6061 in NaCl solution has been studied using potentiodynamic polarisation method and scanning electron microscopy (SEM). The study was carried out in different pH of corrosive medium in the absence and presence of various concentratio...

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Main Authors:	Solhan Yahya, Afidah Abdul Rahim, Affaizza Mohd Shah, Rohana Adnan
Format:	Article
Language:	English
Published:	Universiti Kebangsaan Malaysia 2011
Online Access:	http://journalarticle.ukm.my/2625/ http://journalarticle.ukm.my/2625/ http://journalarticle.ukm.my/2625/1/01_Solhan_Yahya.pdf

id	ukm-2625
recordtype	eprints
spelling	ukm-26252016-12-14T06:32:10Z http://journalarticle.ukm.my/2625/ Inhibitive behaviour of corrosion of aluminium alloy in NaCl by mangrove tannin Solhan Yahya, Afidah Abdul Rahim, Affaizza Mohd Shah, Rohana Adnan, Anticorrosion potential of mangrove tannins on aluminium alloys AA6061 in NaCl solution has been studied using potentiodynamic polarisation method and scanning electron microscopy (SEM). The study was carried out in different pH of corrosive medium in the absence and presence of various concentrations of tannin. The corrosion inhibition behaviour of the mangrove tannin on AA6061 aluminium alloy corrosion was found to be dependant on the pH of NaCl solution. Our results showed that the inhibition efficiency increased with increasing tannins concentration in chloride solution at pH 6. Treatment of aluminium alloy 6061 with all concentrations of mangrove tannins reduced the current density, thus decreased the corrosion rate. Tannins behaved as mixed inhibitors at pH 6 and reduction in current density predominantly affected in cathodic reaction. Meanwhile, at pH 12, addition of tannins shifted the corrosion potential to more cathodic potentials and a passivating effect was observed in anodic potentials. SEM studies have shown that the addition of tannins in chloride solution at pH 12 reduced the surface degradation and the formation of pits. Universiti Kebangsaan Malaysia 2011-09 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/2625/1/01_Solhan_Yahya.pdf Solhan Yahya, and Afidah Abdul Rahim, and Affaizza Mohd Shah, and Rohana Adnan, (2011) Inhibitive behaviour of corrosion of aluminium alloy in NaCl by mangrove tannin. Sains Malaysiana, 40 (9). pp. 953-957. ISSN 0126-6039 http:www.ukm.my/jsm/
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	Anticorrosion potential of mangrove tannins on aluminium alloys AA6061 in NaCl solution has been studied using potentiodynamic polarisation method and scanning electron microscopy (SEM). The study was carried out in different pH of corrosive medium in the absence and presence of various concentrations of tannin. The corrosion inhibition behaviour of the mangrove tannin on AA6061 aluminium alloy corrosion was found to be dependant on the pH of NaCl solution. Our results showed that the inhibition efficiency increased with increasing tannins concentration in chloride solution at pH 6. Treatment of aluminium alloy 6061 with all concentrations of mangrove tannins reduced the current density, thus decreased the corrosion rate. Tannins behaved as mixed inhibitors at pH 6 and reduction in current density predominantly affected in cathodic reaction. Meanwhile, at pH 12, addition of tannins shifted the corrosion potential to more cathodic potentials and a passivating effect was observed in anodic potentials. SEM studies have shown that the addition of tannins in chloride solution at pH 12 reduced the surface degradation and the formation of pits.
format	Article
author	Solhan Yahya, Afidah Abdul Rahim, Affaizza Mohd Shah, Rohana Adnan,
spellingShingle	Solhan Yahya, Afidah Abdul Rahim, Affaizza Mohd Shah, Rohana Adnan, Inhibitive behaviour of corrosion of aluminium alloy in NaCl by mangrove tannin
author_facet	Solhan Yahya, Afidah Abdul Rahim, Affaizza Mohd Shah, Rohana Adnan,
author_sort	Solhan Yahya,
title	Inhibitive behaviour of corrosion of aluminium alloy in NaCl by mangrove tannin
title_short	Inhibitive behaviour of corrosion of aluminium alloy in NaCl by mangrove tannin
title_full	Inhibitive behaviour of corrosion of aluminium alloy in NaCl by mangrove tannin
title_fullStr	Inhibitive behaviour of corrosion of aluminium alloy in NaCl by mangrove tannin
title_full_unstemmed	Inhibitive behaviour of corrosion of aluminium alloy in NaCl by mangrove tannin
title_sort	inhibitive behaviour of corrosion of aluminium alloy in nacl by mangrove tannin
publisher	Universiti Kebangsaan Malaysia
publishDate	2011
url	http://journalarticle.ukm.my/2625/ http://journalarticle.ukm.my/2625/ http://journalarticle.ukm.my/2625/1/01_Solhan_Yahya.pdf
first_indexed	2023-09-18T19:36:35Z
last_indexed	2023-09-18T19:36:35Z
_version_	1777405311120834560

Inhibitive behaviour of corrosion of aluminium alloy in NaCl by mangrove tannin

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