Burner, rigs simulation

Aprigliano, L. F., Burner Rig Simulation of Low Temperature Hot Corrosion, Proceedings of the 1978 Tri-Service Conference on Corrosion, October 1978. 

However, under more realistic test conditions Hancock and Islam showed that in burner rig tests with contaminant flux rates greater than about 0-1 mgcm h" the corrosion rate of nickel- and cobalt-base superalloys was largely independent of alloy composition in the temperature range 7(X)-850 C. However, in burner rig tests at 6(X) C, simulating diesel engine combustion, Saunders et reported that Nimonic 80A (20% Cr) had superior resistance to Stellite 6 (Co-28%Cr) and EN 52 (Fe-8%Cr-3%Si). 

Another oxidation/sulfidation test to assess the performance of gas turbine alloys is the burner rig test A schematic of the burner rig is shown in Fig. 6. Here a jet fuel is burned in a combustion chamber with an air-fuel ratio of 30 1. The flame jrasses down a tube at the end of which are the samples to be evaluated, mounted in a rotating platen. The samples are in the form of pins. The jet fuel normally contains a certain amount of sulfur. There are provisions to add additional sulfur in the form of volatile sulfur compounds. In addition, seawater can be added into the gas stream to simulate a marine environment. The setmples are typicaDy exposed to the flame temperature for 58 min and cooling air for 2 min in a 1-h cycle. The test is typiccJly conducted for about 500 h. 

Simulation Burner Rigs—In the gas turbine industry, burner rigs have been developed to rank materials. The designs may... 

Deposition of corrosive salts is a continuous process. It is difficult to simulate this in a laboratory furnace. For this reason many salt corrosion studies are done by seeding a flame in a burner rig. Fig. 7-33 is a comparison of SiC treated in a burner without salt and with a flame seeded with NaCl. Note the extensive corrosion in the latter case. 

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