Paper Abstract and Keywords |
Presentation |
2020-12-25 15:05
Effect of martensitic transformation rate on local corrosion of stainless steel Yuta Yagi (NAKABOHTEC), Hiroki Ichikawa, Kazuhiko Noda (SIT), Yoshimi Watanabe (NIT) OME2020-11 Link to ES Tech. Rep. Archives: OME2020-11 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Austenitic stainless steels have high corrosion resistance, but are low strength. So, they have a limited range of use for structural material. Accordingly, a martensitic phase-introduced stainless steel with high strength has been developed. Although the introduction of the martensite phase improves the strength, there is a risk that the corrosion resistance is reduced. Therefore, in this study, it was investigated that the local corrosion of martensitic phase-introduced austenitic stainless steel. At First, the polarization curves of SUS304 with different martensite phase introduction rates (transformation rates) were measured in neutral NaCl solution. As a result, it was found that the introduction of the martensite phase did not affect the pitting potential (occurrence of pitting corrosion). Secondly, specimens with different martensitic rates were polarized at constant current in neutral NaCl solution to investigate the growth of pitting corrosion. As a result, as the martensitic rate increased, small size pitting corrosion decreased and large size pitting corrosion increased. So, the martensite phase affects the growth of pitting corrosion. Finally, in order to investigate the effect of martensite phase on growth of pitting corrosion, specimens with different martensitic rates were polarized at constant potential in acidic NaCl solution simulated the inside of pit. As a result, in a low pH environment, in the case that martensite transformation rate increases, the amount of dissolution increases even in the passive region. It is considered that dissolution is increased inside the pit, and pitting corrosion grows in the case of high martensitic rate. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Stainless steel / Functionally graded material / Martensitic transformation / Pitting corrosion / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 120, no. 307, OME2020-11, pp. 18-22, Dec. 2020. |
Paper # |
OME2020-11 |
Date of Issue |
2020-12-18 (OME) |
ISSN |
Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
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OME2020-11 Link to ES Tech. Rep. Archives: OME2020-11 |
Conference Information |
Committee |
OME |
Conference Date |
2020-12-25 - 2020-12-26 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Okinawaken Seinen Kaikan |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
bio-technology, surface and interfacial phenomena, measurement and observation, electronics, and other researches relating these |
Paper Information |
Registration To |
OME |
Conference Code |
2020-12-OME |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Effect of martensitic transformation rate on local corrosion of stainless steel |
Sub Title (in English) |
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Keyword(1) |
Stainless steel |
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Functionally graded material |
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Martensitic transformation |
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Pitting corrosion |
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1st Author's Name |
Yuta Yagi |
1st Author's Affiliation |
NAKABOHTEC CORROSION PROTECTING CO., LTD. (NAKABOHTEC) |
2nd Author's Name |
Hiroki Ichikawa |
2nd Author's Affiliation |
Shibaura Institute of Technology (SIT) |
3rd Author's Name |
Kazuhiko Noda |
3rd Author's Affiliation |
Shibaura Institute of Technology (SIT) |
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Yoshimi Watanabe |
4th Author's Affiliation |
Nagoya Institute of Technology (NIT) |
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Speaker |
Author-1 |
Date Time |
2020-12-25 15:05:00 |
Presentation Time |
25 minutes |
Registration for |
OME |
Paper # |
OME2020-11 |
Volume (vol) |
vol.120 |
Number (no) |
no.307 |
Page |
pp.18-22 |
#Pages |
5 |
Date of Issue |
2020-12-18 (OME) |
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