Engineering Commons^™

High Temperature Oxidation Of Alumina Forming Cast Austenitic Stainless Steels Within An Environment Of Pure Steam, Elmer A. Prenzlow

Theses and Dissertations

Steam cracking of hydrocarbons in the petrochemical industry is a multibillion dollar industry. The processes performed in these plants create byproducts that negatively affect the integrity of stainless steel piping through high temperature corrosion. Alloys used presently in industry rely on the formation of chromium oxide (chromia) as a protective layer between the bulk metal pipe and chemical byproducts. However, chromia can become susceptible to attack from aggressive species such as carbon, water vapor, and sulfur compounds, thus creating a need for a better protection method.

A new series of austenitic stainless steels have been developed in recent years that, …

Study Of Ceria Nanoparticles Synthesis And The Performance Of Nano-Ceria Coating For High Temperature Oxidation Resistance In Combustion Atmosphere, Lingke Mao

Theses and Dissertations

Ceria (CeO2 ) nanoparticles were synthesized by the microemulsion method with Bis(2-ethylhexyl) Sulfosuccinate Sodium Salt (AOT) as the surfactant. Stirring speed during synthesis was used to optimize the process and a precipitation process was applied to dilute the surfactant. The prepared ceria nanoparticles were characterized by x-ray diffraction (XRD) and transmission electron microscopy (TEM). As the result, non-agglomerated and time-stable ceria nanoparticles were obtained with the average particles size of 2-3 nanometers. Stainless steel 316L substrates were coated by a dipping method with the help of a slide motor which provided constant speed and uniform coating layers. Both coated and …