Abstract:

The large amount of vanadium in Orimulsion may cause unexpected problems in the prevention of hightemperature corrosion of furnace. In order to solve this problem, the corrosion mechanism of vanadium at high tem perature is analyzed and the chaos theory is adopted to establish a corrosion-forecasting model based on the maximum Lyapunov exponent. The proposed model is then tested according to the depth of high-temperature corrosion of a pipeline measured by means of a resistance probe. Tested and predicated results show that the prediction is of high precision, and that the error of corrosion depth is less than 6% with the average being 3.58%. It is thus coneluded that the proposed forecasting model can effectively predict the high-temperature corrosion of metal and lay theoretical foundations for the forecasting of vanadium corrosion at high temperature.

Key words: Orimulsion, non-Newtonian fluid, high-temperature corrosion, chaos theory, Lyapunov exponent