Experimental Analysis of Corrosion Resistance on Columnar to Equiaxed Transition Region of as Cast Structures of AL–CU Alloys

Ganesan Venkatachalam

Title:
Experimental Analysis of Corrosion Resistance on Columnar to Equiaxed Transition Region of as Cast Structures of AL–CU Alloys

Authors:
Ganesan Venkatachalam
DOI:
https://doi.org/10.31142/ijtsrd18733

Cite This Article :

Ganesan Venkatachalam "Experimental Analysis of Corrosion Resistance on Columnar to Equiaxed Transition Region of as Cast Structures of AL–CU Alloys" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-6, October 2018, pp.756-760, URL: https://www.ijtsrd.com/papers/ijtsrd18733.pdf

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Abstract :
In the present article, in order to investigate the corrosion resistance tendency on both sides of the columnar to equiaxed transition (CET), some samples of Al–Cu alloys (5 and 8 wt-%Cu) were prepared on the columnar and on the equiaxed sides of the casting and subjected to corrosion tests. The corrosion resistance has been analysed by both the electrochemical impedance spectroscopy technique and Tafel extrapolation method conducted in a 3%NaCl solution at room temperature. It was found that both columnar and equiaxed morphologies at the CET region, for each alloy examined, have attained similar experimental electrochemical impedance and polarisation results. The secondary dendrite arm spacings l2 on both columnar and equiaxed sides of the CET region are very similar in any case experimentally examined and the resemblance on the corrosion resistance of columnar and equiaxed structures has been attributed to the similarity of such micro structural parameter.

Keywords :
Columnar to equiaxed transition, Dendrite arm spacing, Corrosion resistance

Publication Details:

Unique Identification Number : IJTSRD18733

Published In : Volume-2 | Issue-6, October 2018

Page Number(s) : 756-760

Publisher Name : IJTSRD | www.ijtsrd.com | E-ISSN 2456-6470

Copyright © 2019 by author(s) and International Journal of Trend in Scientific Research and Development Journal. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0) (http://creativecommons.org/licenses/by/4.0)

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