Nondestructive evaluation of temper embrittlement of Cr-Mo-V cast steels by electrochemical method using calcium nitrate solution

Yutaka Watanabe, Tetsuo Shoji

Research output: Contribution to journalArticlepeer-review

Abstract

Quantitative evaluation of temper embrittlement of turbine casing material by anodic polarization behavior in calcium nitrate solution was investigated. A nondestructive electrochemical method for detection and evaluation of temper embrittlement was developed. Intergranular corrosion (IGC) occurs only on temper embrittled samples during anodic polarization in calcium nitrate solution. In polarization curves measured at 60°C, the increases in current density at passive potential range and in passivation potential attributable to IGC have a correlation with shifts in FATT caused by temper embrittlement. In polarization curves measured at 30°C, increases in current density of the second peak current attributable to IGC have a correlation with shifts in FATT.

Original languageEnglish
Pages (from-to)566-573
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume77
Issue number4
DOIs
Publication statusPublished - 1991

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Nondestructive evaluation of temper embrittlement of Cr-Mo-V cast steels by electrochemical method using calcium nitrate solution'. Together they form a unique fingerprint.

Cite this