Acoustic Emission Properties of Corrosion Pitting in SUS304 Stainless Steel during MgCl2 Droplet Corrosion Testing

• Shiwa Mitsuharu

  National Institute for Materials Science

• Ito Kaita

  National Institute for Materials Science

• Masuda Hiroyuki

  National Institute for Materials Science

• Yamawaki Hisashi

  National Institute for Materials Science

• Adachi Yoshitaka

  National Institute for Materials Science

• Ojima Mayumi

  National Institute for Materials Science

• Enoki Manabu

  Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo

Bibliographic Information

Other Title

• 塩化マグネシウム液滴腐食試験時に発生したＳＵＳ３０４腐食ピットのＡＥ特性
• エンカ マグネシウム エキテキ フショク シケンジ ニ ハッセイ シタ SUS304 フショク ピット ノ AE トクセイ

Abstract

  Acoustic emission (AE) monitoring for corrosion of small chloride droplet was proposed to investigate its mechanism. The corrosion testing in thin plate specimens of SUS304 stainless steel was conducted on an AE waveform measurement system with a high sensitivity AE sensor. Three types of corrosion were observed in the corrosion testing, which were the open pitting, covered pitting and snake-like corrosion, respectively. There were many AE events in the covered pitting and the snake-like corrosion. On the contrary, there was no AE event in the open pitting. Besides, the cross section of the snake-like corrosion was analyzed by EBSD. It shows that there were some cracks at the {111} interface of Σ3 coincidence boundary and annealing twins under the corrosion surface. Therefore, it can be concluded that the detected AE signals of corrosion testing were mainly attributed to the cracking in the covered pitting and the snake-like corrosion.<br>

Journal

• Journal of the Japan Institute of Metals and Materials

  Journal of the Japan Institute of Metals and Materials 74 (9), 559-564, 2010

  The Japan Institute of Metals and Materials

Keywords

• corrosion
• droplet
• SUS304
• acoustic emission
• cracking

Details

• CRID: 1390282681453744000
• NII Article ID: 10026599377
• NII Book ID: AN00187860
• DOI: 10.2320/jinstmet.74.559
• COI: 1:CAS:528:DC%2BC3cXhtlKitbnM
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL BIB ID: 10804501
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10804501
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet/74/9/74_9_559/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed