This paper presents corrosion test results of candidate alloys for balance-of-plant (BoP) at the hydrogen side in alkaline water electrolyzers. Experiments were carried out at industrially relevant conditions, i.e. 60-80 °C in 25 wt% KOH solutions at H2 pressures ranging from 1 bar (cf. atmospheric units) to 15 bar (cf. pressurized units). Materials tested were nickel base alloy UNS N06625, austenitic stainless steel UNS S31603, super duplex UNS S327X0 and carbon steel UNS K03014. Mass loss corrosion and localized corrosion based on surface profilometry were used to evaluate materials performance. Corrosion scales were characterized using XRD.

Subject
X-ray diffraction, Films, Water, Materials, Substrates, Corrosion rate, Steel coupons, Corrosion cracking, Corrosion products, Magnetite, Carbon steel, Corrosion coupons, Hydrogen
Keywords:
Alkaline, water electrolysis, CRA, corrosion
© 2024 Association for Materials Protection and Performance (AMPP). All rights reserved. This work is protected by both domestic and international copyright laws. 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).
2024
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.