Please use this identifier to cite or link to this item: https://idr.l4.nitk.ac.in/jspui/handle/123456789/11493
Title: Enhancement of resistance to galvanic corrosion of ZE41 Mg alloy by equal channel angular pressing
Authors: Sekar, P.
Sanna, N.
Desai, V.
Issue Date: 2019
Citation: Materials and Corrosion, 2019, Vol., , pp.-
Abstract: The galvanic corrosion behavior of as-received and ECAPed ZE41 Mg alloy coupled with Al7075 alloy is investigated using zero resistance ammeter in three different corrosive environments, 0, 0.1, and 1 M NaCl, to mimic the conditions experienced in engineering applications. The mechanism of galvanic corrosion for the ZE41 Mg Al7075 aluminum alloy is explained. It is observed that a robust surface film containing a composite layer of oxide/hydroxide of magnesium and aluminum is established in deionized water (0 M). However, only a single layer of magnesium oxide/hydroxide is detected in chloride-containing environments. Equal channel angular pressing (ECAP) improved the resistance to galvanic corrosion by 58% and 54% when compared with the as-cast counterparts in 0 and 1 M NaCl solution, respectively. In contrast, galvanic corrosion resistance decreased by 26% in 0.1 M NaCl after ECAP while the as-received samples evinced pits unfavorable to be used in engineering applications. ECAP is a promising method to combat galvanic corrosion encountered by ZE41 magnesium alloy used in automobiles and components of military vehicles. 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
URI: http://idr.nitk.ac.in/jspui/handle/123456789/11493
Appears in Collections:1. Journal Articles

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