FORMATION OF ALKALI IRON SULFATES AND OTHER COMPOUNDS CAUSING CORROSION IN BOILERS AND GAS TURBINES
Summary rept. no. 2, 1 Jan-30 Jun 1967
BATTELLE MEMORIAL INST COLUMBUS OH COLUMBUS LABS
Pagination or Media Count:
The question of the relative importance of SO3 and of SO2 O2 in flue gas in forming the complex sulfates that lead to corrosion has been answered by recent work with radioactive sulfur as a tracer. These test have shown that SO3 even in low concentrations is much more reactive. Additional measurements of the reaction of SO2 O2 on catalytic surfaces now confirm that ample SO3 can be formed at the surface at a low gas velocity to account for the formation of the trisulfates. Such low gas velocities may exist on surfaces in boiler furnaces and gas turbines beneath layers of deposits. Trace amounts of trisulfates now can be detected by an optical technique, and also an electrochemical device was developed that appears capable of indicating the onset of corrosion within a few minutes after establishing corrosive conditions.
- Industrial Chemistry and Chemical Processing
- Properties of Metals and Alloys