Investigation on high temperature oxidation and hot corrosion behavior of sa213 t92 steel weldment

Abstract

The recent advancements in material technology to develop materials for high temperature applications and cooling systems are expected to provide improved operating life for boilers gas turbines and other thermal devices with enhanced properties The study on the issue of high temperature oxidation and hot corrosion has brought forth many important observations that are discussed below The efficiency of the fossil power plant is improved newlineby increasing the temperature and pressure The martensitic and ferritic steels used currently as boiler tube materials are useful only up to 620oC and do not have the oxidation and spallation properties to endure severe service conditions Boiler tube steels are required to have tolerance to all stages of the fabrication processes such as welding and provide creep strength along with sufficient fireside corrosion and steam side oxidation resistance Spallation of a formed steam side oxide can have severe adverse effects such as collection of the spalled material in the bottom of tube bends leading to blockage overheating and premature creep rupture as well as transportation of the oxide through the system to the main steam valves and turbine resulting in erosion damage developments in multicomponent organic transformations using solid acid catalysts have been highly influenced by the field of heterogeneous catalysis Particularly clay and its modified forms catalyzed multicomponent organic transformations play a pivotal role and take part in newlinesustainable development Inexpensive efficient reusable and eco friendly novel green newlinecatalytic systems H3BO3 supported montmorillonite K10 H3BO3 slash mont K10 newlineand Al3 exchanged Indian clay Al3 ExIC were developed newline