Short term online corrosion measurements in biomass fired boilers. Part 1: Application of a newly developed mass loss probe

Short term online corrosion measurements in biomass fired boilers. Part 2: Investigation of the corrosion behavior of three selected superheater steels for two biomass fuels

“…At the exit of the drop tube the measurement ports for the online corrosion probe and the mass loss probe are located. A more detailed description of the experimental facility is given in [1,9].…”

“…The relation between the corrosion signal and the actual corrosion rate is determined with the mass loss of the mass loss ring. A more detailed description of the online corrosion probe can be found in [1,[10][11][12].…”

“…Therefore, in the initial phase of the measurement, which lasts about 300 h based on experiences with forest wood chips combustion, the actual corrosion rates cannot be correctly determined with the online corrosion probe. A detailed description of this measurement error is given in [1].…”

“…In order to gain data for correction of the measurement error from the online corrosion probe during the initial phase a special mass loss probe has been developed as described in [1]. The mass loss probe consists of an air-cooled carrier-lance with five test rings on top.…”

“…In a previous study [1] the application of online corrosion probes for the evaluation of high temperature corrosion in biomass-fired boilers based on short-term measurements has been investigated. It was shown that during the initial phase the measurement does not represent the actual corrosion rate, but the corrosion signal starts at zero and increases gradually until it is proportional to the corrosion rate.…”