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Electrochemical corrosion rate probes have been constructed and tested along with mass loss coupons in an air plus water vapor and a N2/O2/CO2 plus water vapor environment. Temperatures ranged from 200º to 700ºC. Results show that electrochemical corrosion rates for ash-covered mild steel are a function of time, temperature and process environment.
Electrochemical corrosion rate probes have been constructed and tested along with mass loss coupons in an air plus water vapor and a N2/O2/CO2 plus water vapor environment. Temperatures ranged from 200º to 700ºC. Results show that electrochemical corrosion rates for ash-covered mild steel are a function of time, temperature and process environment. Correlation between the electrochemical and mass loss corrosion rates was poor.
Keywords: corrosion, coal combustion, gaseous, electrochemical noise, harmonic distortion, linear polarization resistance, high temperature.
The effect of fluid flow on corrosion, or flow accelerated corrosion, is defined by mass transfer and wall shear stress parameters existing in the water phase contacting the solid wall. Jet impingement offers an experimental method to measure the effect of these parameters on corrosion.
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This paper describes corrosion rate prediction models for the main corrosion mechanisms of carbon steel in Exploration and Production service. The models succeed earlier work by De Waard, Milliams, and Lotz.
The influence of acetate ion on the rate of corrosion of carbon steel (X65) in 3 % NaCl brine saturated with carbon dioxide has been investigated using voltammetry at a rotating disc electrode. The rate of corrosion can only be understood if it is recognised that the cathodic process in the steel corrosion is affected by acetic acid.