High temperature electrochemical corrosion rate probes
Corrosion occurs in the high temperature sections of energy production plants due to a number of factors: ash deposition, coal composition, thermal gradients, and low NOx conditions, among others. Electrochemical corrosion rate (ECR) probes have been shown to operate in high temperature gaseous environments that are similar to those found in fossil fuel combustors. ECR probes are rarely used in energy production plants at the present time, but if they were more fully understood, corrosion could become a process variable at the control of plant operators. Research is being conducted to understand the nature of these probes. Factors being considered are values selected for the Stern-Geary constant, the effect of internal corrosion, and the presence of conductive corrosion scales and ash deposits. The nature of ECR probes will be explored in a number of different atmospheres and with different electrolytes (ash and corrosion product). Corrosion rates measured using an electrochemical multi-technique capabilities instrument will be compared to those measured using the linear polarization resistance (LPR) technique. In future experiments, electrochemical corrosion rates will be compared to penetration corrosion rates determined using optical profilometry measurements.
- Research Organization:
- Albany Research Center (ARC), Albany, OR
- Sponsoring Organization:
- USDOE - Office of Fossil Energy (FE)
- OSTI ID:
- 901569
- Report Number(s):
- DOE/ARC-2005-037; ISBN: 1-890977-22-5
- Journal Information:
- 22nd Annual International Pittsburgh Coal Conference CD-ROM Proceedings, 2005, session 39, paper 5, PDF file #120, 9 pp., Journal Name: 22nd Annual International Pittsburgh Coal Conference CD-ROM Proceedings, 2005, session 39, paper 5, PDF file #120, 9 pp. Vol. 22
- Publisher:
- University of Pittsburgh School of Engineering, 1249 Benedum Hall, Pittsburgh, PA
- Country of Publication:
- United States
- Language:
- English
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