A series of amorphous Ni-Zr-Al alloys were prepared by the melt spinning process. The corrosion characteristics of these alloys were measured using DC polarization techniques and gravimetric methods. The test environments were aerated HCl acid solutions. The measured corrosion currents were lower for the (Ni36Zr64)xAl(1-x) alloys than for the (Ni50Zr50)xAl(1-x) alloys. The open circuit potentials were 200 mV more positive for the (Ni36Zr64)xAl(1-x) alloys than for the (Ni50Zr50)xAl(1-x) alloys. Al additions up to about 5 At % appear to improve the corrosion resistance of both alloys. The corrosion rate for the (Ni36Zr64)90Al10 alloy was measured as a function of temperature and the activation energy for the process was determined.

Subject
Ribbons, Corrosion resistant alloys, Composition, Corrosion currents, Corrosion rate, Nickel based alloys, Activation energy, Electrochemical data, Corrosion data, Zirconium alloys, Corrosion resistance, Aluminum alloys, Linear polarization resistance
Keywords:
amorphous alloys, corrosion rate, dc polarization, gravimetric, melt spun, NiZr alloys, open circuit potentials
© 1991 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1991
Association for Materials Protection and Performance (AMPP)
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