Effect of shot-peening on the corrosion resistance of a Zr-based bulk metallic glass

Surfaces of bulk glassy Zr(59)Ti(3)Cu(20)Al(10)Ni(8) samples were shot-peened for different times and their corrosion behaviour was tested in 0.01 M Na(2)SO(4) + xM NaCl (x = 0; 0.01; 0.1) and 6 M HCl. Slight improvement of spontaneous passivity but a decrease of pitting resistance are detected with prolonged shot-peening duration. The corrosion damage evolution is governed by the nature of the mechanically generated defects and their surrounding stress fields. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.