New electrochemical testing techniques reveal that within-grade variations of corrosion resistance of Type 316L stainless steel plate used in manufacture of paper machine headboxes are large and not readily predicted without a direct test. A controlled-inclusion quality of 316L designed for improved machinability and electropolishing was shown to be within the range of corrosion resistance found for randomly selected commercial Type 316L stainless steel plates. Variation of corrosion resistance as a function of section tested, characteristic of all commercial Type 316L stainless steel, was shown. The importance of steelmaking practice and its influence on details of non-metallic inclusions present was demonstrated.

Subject
Test methods, Steel surfaces, Composition, Manufacturing, Crevice corrosion, Specimen preparation, Steel, Equipment, Pitting, Sulfides, Corrosion resistance, Stainless steel, Inclusions
Keywords:
316L stainless steel, pulp and paper, paper machine headboxes, passivity breakdown, repassivation, test equipment, test method, accelerated test, laboratory tests, critical pitting temperature
© 1990 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).
1990
Association for Materials Protection and Performance (AMPP)
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