High-strength steel in cracked prestressed concrete is at risk of hydrogen embrittlement, which makes it necessary to clarify the sub-surface hydrogen concentration behavior of the enclosed steel bar from the standpoint of safety. Electrochemical hydrogen permeation tests can measure the sub-surface hydrogen concentration of steel continuously and nondestructively, but the measurable geometry is limited to plates and cannot be directly applied to internal bars. We therefore developed an electrochemical hydrogen permeation test method to evaluate the sub-surface hydrogen concentration of a bar within concrete, using concrete poles as a representative example. Experimental results demonstrated that the proposed method succeeded in obtaining changes over time in the sub-surface hydrogen concentration of steel bars in prestressed concrete.

Subject
Hydrogen induced cracking, Hydrogen embrittlement, Water, Hydrogen permeation, Modeling, Hydrogen concentration, Diffusion, Corrosion cracking, Permeation current, Prestressed concrete, Steel, Concrete, Hydrogen
Keywords:
Hydrogen embrittlement, Hydrogen permeation method, prestressed concrete, Infrastructure
© 2023 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 (OR NACE OR SSPC). Responsibility for the content of the work lies solely with the author(s).
2023
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.