Study of the selective dissolution behavior of duplex stainless steel by micro-electrochemical technique

Yan Fu, Changjian Lin, Wen Ta Tsai

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)

摘要

The Ag-AgCl micro-reference electrodes were fabricated and used to determine the potentials of ferrite and austenite in duplex stainless steel in NaCl solutions separately. The result shows that ferrite has lower corrosion potential than that of austenite. To determine the corrosion behavior for the single phases accurately and obtain more information about the selective corrosion, a capillary-based micro electrochemical system was established. The electrochemical determinations of ferrite and austenite were performed respectively in solutions containing nitric acid and FeCl3. According to the results, ferrite has more noble corrosion potential and low current density in 1.5 mol/L HNO3 and 1.5 mol/L HNO3+0.5 mol/L FeCl3 solutions, thus selective corrosion occurred in austenite phase, while, in 1.5 mol/L HNO3+0.1 mol/L FeCl3 solutions, the potential differences between two phases are not obvious, which result in little selective corrosion.

原文English
頁(從 - 到)302-306
頁數5
期刊Jinshu Xuebao/Acta Metallurgica Sinica
41
發行號3
出版狀態Published - 2005 三月 1

All Science Journal Classification (ASJC) codes

  • 岩土工程與工程地質
  • 材料力學
  • 機械工業
  • 金屬和合金

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