Preprint Article Version 1 This version is not peer-reviewed

Hydrogen Storage Characteristics and Corrosion Behavior of V-rich Ti-V-Cr-Fe Alloy

Version 1 : Received: 30 March 2017 / Approved: 31 March 2017 / Online: 31 March 2017 (09:19:32 CEST)

A peer-reviewed article of this Preprint also exists.

Mohammed Abdul, J.; Hearth Chown, L.; Kolawole Odusote, J.; Nei, J.; Young, K.-H.; Taiye Olayinka, W. Hydrogen Storage Characteristics and Corrosion Behavior of Ti24V40Cr34Fe2 Alloy. Batteries 2017, 3, 19. Mohammed Abdul, J.; Hearth Chown, L.; Kolawole Odusote, J.; Nei, J.; Young, K.-H.; Taiye Olayinka, W. Hydrogen Storage Characteristics and Corrosion Behavior of Ti24V40Cr34Fe2 Alloy. Batteries 2017, 3, 19.

Journal reference: Batteries 2017, 3, 19
DOI: 10.3390/batteries3020019

Abstract

In this work, we investigated the effects of heat treatment on the microstructure, hydrogen storage characteristics and corrosion rate of a Ti34V40Cr24Fe2 alloy. The arc melted alloy was divided into three samples, two of which were separately quartz-sealed under vacuum and heated to 1000 °C for 1 h; one of these samples was quenched and the other furnace cooled to ambient temperature. The crystal structures of the samples were studied via X-ray diffractometry and scanning electron microscopy. Absorption/desorption characteristics were investigated using a Sievert apparatus. Potentiostat corrosion tests on the alloys were performed using an AutoLab® corrosion test apparatus and electrochemical cell. All samples exhibited a mixture of body-center-cubic (BCC) and Laves phase structures. The corrosion rate, maximum absorption, and useful capacities increased after both heat treatments. The annealed sample had the highest absorption and reversible capacity. The plateau pressure of the as-cast alloy increased after quenching. The corrosion rate increased from 0.0004 mm/y in as-cast sample to 0.0009 mm/y after annealing and 0.0017 mm/y after quenching, due to a decrease in the Cr-content of the C14 phase.

Subject Areas

Ti-V-Cr-Fe alloy; hydrogen storage characteristics; metal corrosion; heat treatment; crystal structure

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