Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Thermal Stress Relaxation and High-Temperature Corrosion of Cr-Mo Steel Processed Using Multifunction Cavitation

Masataka Ijiri
* ORCID logo ,
Norihiro Okada
,
Syouta Kanetou
,
Masato Yamamoto
,
Daisuke Nakagawa
,
Kumiko Tanaka
,
Toshihiko Yoshimura
Version 1 : Received: 15 September 2018 / Approved: 17 September 2018 / Online: 17 September 2018 (08:02:10 CEST)

A peer-reviewed article of this Preprint also exists.

Ijiri, M.; Okada, N.; Kanetou, S.; Yamamoto, M.; Nakagawa, D.; Tanaka, K.; Yoshimura, T. Thermal Stress Relaxation and High-Temperature Corrosion of Cr-Mo Steel Processed Using Multifunction Cavitation. Materials 2018, 11, 2291. Ijiri, M.; Okada, N.; Kanetou, S.; Yamamoto, M.; Nakagawa, D.; Tanaka, K.; Yoshimura, T. Thermal Stress Relaxation and High-Temperature Corrosion of Cr-Mo Steel Processed Using Multifunction Cavitation. Materials 2018, 11, 2291.

DOI: 10.3390/ma11112291

Abstract

This research investigated high-temperature corrosion (500 °C) of Cr-Mo steel processed using water jet peening or multifunction cavitation (MFC), and the suitability of such steel for high-temperature boilers and reaction vessels. High-temperature corrosion was induced using an embedment test and a coating test using sulfide-type K2SO4-Na2SO4 powder. To measure the relaxation of the residual stress due to the decrease in work hardening caused by an increase in specimen temperature and the difference in thermal shrinkage between the surface and interior of the specimen, a thermal cycling test was conducted. For the MFC-processed specimen, the oxide film that formed on the surface suppressed mass loss, prevented crack formation, and reduced the compressive residual stress caused by high-temperature corrosion. MFC-processed Cr-Mo steel is thus suitable for a high-temperature corrosion environment.

Keywords

water jet peening; multifunction cavitation; Hot corrosion; Thermal stress cycle; Cr-Mo steel; embedding test; coating test

Subject

MATERIALS SCIENCE, Surfaces, Coatings & Films

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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