Material Coupon Test in Victorian Brown Coal Liquefaction Pilot Plant in Australia

Abstract

Corrosion resistance and cracking behavior of 36 candidate materials have been investigated in Victorian Brown Coal Liquefaction Pilot Plant and the result is described herein. Test coupons for corrosion and cracking have been installed in each equipment in the 50 t/d pilot plant for Australian brown coal. Effects of environments and alloying elements on corrosion and environmental cracking are clarified and documented as references for material selection. Austenitic stainless steel for reactors and vapor/liquid separators, and titanium and high Ni alloy for the fractionating column are recommended as a result of this investigation. In addition to corrosion problems during operation, influences of shut down on corrosion are also discussed.