Corrosion monitoring in a straw-fired power plant using an electrochemical noise probe

✍ Scribed by F. Cappeln; N.J. Bjerrum; I.M. Petrushina

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: German
• Weight: 365 KB
• Volume: 58
• Category: Article
• ISSN: 0947-5117
• DOI: 10.1002/maco.200604045

✦ Synopsis

Abstract

Electrochemical Noise Measurements have been carried out in situ in a straw‐fired power plant using an experimental probe constructed from alumina and AISI 347 steel. Based on a framework of controlled laboratory experiments it has been found that electrochemical noise has the unique ability to provide in‐situ monitoring of intergranular corrosion in progress. The probe had a lifetime of two months. It was shown that down‐time corrosion in the boiler was negligible. Electrochemical noise data indicated that metal temperatures around 590°C should be avoided as the intergranular corrosion is at an increased level at this temperature, most likely because of favorable conditions for molten salt film condensation.