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Modelling corrosion rate of biodegradable magnesium-based alloys: the case study of Mg-Zn-RE-xCa (x = 0, 0.5, 1.5, 3 and 6 wt%) alloys

The ternary Mg-Zn-RE and the quaternary Mg-Zn-RE-xCa (x = 0.5, 1.5, 3 and 6 wt%) alloys are evaluated in term of their corrosion rate both experimentally and theoretically. According to the electrochemical tests, the quaternary Mg-Zn-RE-0.5Ca alloy possess a lower corrosion current density (icorr) a...

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Main Authors:	Bakhsheshi-Rad, H. R., Abdellahi, M., Hamzah, E., Ismail, A. F., Bahmanpour, M.
Format:	Article
Published:	Elsevier 2016
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/70001/ http://dx.doi.org/10.1016/j.jallcom.2016.06.149
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spelling	my.utm.700012017-11-20T08:52:11Z http://eprints.utm.my/id/eprint/70001/ Modelling corrosion rate of biodegradable magnesium-based alloys: the case study of Mg-Zn-RE-xCa (x = 0, 0.5, 1.5, 3 and 6 wt%) alloys Bakhsheshi-Rad, H. R. Abdellahi, M. Hamzah, E. Ismail, A. F. Bahmanpour, M. TP Chemical technology The ternary Mg-Zn-RE and the quaternary Mg-Zn-RE-xCa (x = 0.5, 1.5, 3 and 6 wt%) alloys are evaluated in term of their corrosion rate both experimentally and theoretically. According to the electrochemical tests, the quaternary Mg-Zn-RE-0.5Ca alloy possess a lower corrosion current density (icorr) and higher charge transfer resistance (Rt) compared to the ternary Mg-Zn-RE alloy. However, as the Ca increases, icorr and Rt tend toward the higher and lower values, respectively. Immersion tests also show that the addition of 0.5 wt% Ca decreases the corrosion rate of the Mg-Zn-RE alloy. This despite the fact that with increasing the Ca content to 6 wt% a significant increase occurs in the corrosion rate as a result of the galvanic coupling effect. The study also defines a new reliability simulation framework to predict the corrosion behavior of the Mg-based alloys using gene expression programming (GEP) tool. For this purpose a colossal database is collected from the literature and all of the parameters affecting the corrosion rate are introduced to the GEP model. Two case study on the ternary Mg-Zn-RE and the quaternary Mg-Zn-RE-xCa (x = 0.5, 1.5, 3 and 6 wt%) alloys are also conducted to evaluate the accuracy of the presented GEP model. according to the results obtained, the maximum error of the presented model in the predicting corrosion rate was close to 0.5 mm/yr which is promising result. Elsevier 2016 Article PeerReviewed Bakhsheshi-Rad, H. R. and Abdellahi, M. and Hamzah, E. and Ismail, A. F. and Bahmanpour, M. (2016) Modelling corrosion rate of biodegradable magnesium-based alloys: the case study of Mg-Zn-RE-xCa (x = 0, 0.5, 1.5, 3 and 6 wt%) alloys. Journal of Alloys and Compounds, 687 . pp. 630-642. http://dx.doi.org/10.1016/j.jallcom.2016.06.149 DOI:10.1016/j.jallcom.2016.06.149
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	TP Chemical technology
spellingShingle	TP Chemical technology Bakhsheshi-Rad, H. R. Abdellahi, M. Hamzah, E. Ismail, A. F. Bahmanpour, M. Modelling corrosion rate of biodegradable magnesium-based alloys: the case study of Mg-Zn-RE-xCa (x = 0, 0.5, 1.5, 3 and 6 wt%) alloys
description	The ternary Mg-Zn-RE and the quaternary Mg-Zn-RE-xCa (x = 0.5, 1.5, 3 and 6 wt%) alloys are evaluated in term of their corrosion rate both experimentally and theoretically. According to the electrochemical tests, the quaternary Mg-Zn-RE-0.5Ca alloy possess a lower corrosion current density (icorr) and higher charge transfer resistance (Rt) compared to the ternary Mg-Zn-RE alloy. However, as the Ca increases, icorr and Rt tend toward the higher and lower values, respectively. Immersion tests also show that the addition of 0.5 wt% Ca decreases the corrosion rate of the Mg-Zn-RE alloy. This despite the fact that with increasing the Ca content to 6 wt% a significant increase occurs in the corrosion rate as a result of the galvanic coupling effect. The study also defines a new reliability simulation framework to predict the corrosion behavior of the Mg-based alloys using gene expression programming (GEP) tool. For this purpose a colossal database is collected from the literature and all of the parameters affecting the corrosion rate are introduced to the GEP model. Two case study on the ternary Mg-Zn-RE and the quaternary Mg-Zn-RE-xCa (x = 0.5, 1.5, 3 and 6 wt%) alloys are also conducted to evaluate the accuracy of the presented GEP model. according to the results obtained, the maximum error of the presented model in the predicting corrosion rate was close to 0.5 mm/yr which is promising result.
format	Article
author	Bakhsheshi-Rad, H. R. Abdellahi, M. Hamzah, E. Ismail, A. F. Bahmanpour, M.
author_facet	Bakhsheshi-Rad, H. R. Abdellahi, M. Hamzah, E. Ismail, A. F. Bahmanpour, M.
author_sort	Bakhsheshi-Rad, H. R.
title	Modelling corrosion rate of biodegradable magnesium-based alloys: the case study of Mg-Zn-RE-xCa (x = 0, 0.5, 1.5, 3 and 6 wt%) alloys
title_short	Modelling corrosion rate of biodegradable magnesium-based alloys: the case study of Mg-Zn-RE-xCa (x = 0, 0.5, 1.5, 3 and 6 wt%) alloys
title_full	Modelling corrosion rate of biodegradable magnesium-based alloys: the case study of Mg-Zn-RE-xCa (x = 0, 0.5, 1.5, 3 and 6 wt%) alloys
title_fullStr	Modelling corrosion rate of biodegradable magnesium-based alloys: the case study of Mg-Zn-RE-xCa (x = 0, 0.5, 1.5, 3 and 6 wt%) alloys
title_full_unstemmed	Modelling corrosion rate of biodegradable magnesium-based alloys: the case study of Mg-Zn-RE-xCa (x = 0, 0.5, 1.5, 3 and 6 wt%) alloys
title_sort	modelling corrosion rate of biodegradable magnesium-based alloys: the case study of mg-zn-re-xca (x = 0, 0.5, 1.5, 3 and 6 wt%) alloys
publisher	Elsevier
publishDate	2016
url	http://eprints.utm.my/id/eprint/70001/ http://dx.doi.org/10.1016/j.jallcom.2016.06.149
_version_	1643656069557256192
score	13.211869

Modelling corrosion rate of biodegradable magnesium-based alloys: the case study of Mg-Zn-RE-xCa (x = 0, 0.5, 1.5, 3 and 6 wt%) alloys

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