Date: Thursday, Jan 13th
Presenter: Kyle Rozman and Tosapol Maluangnont, Oregon State University
Kyle Rozman Abstract:
Corrosion and Fatigue of Oil Drilling Steels
Ultra deep drilling, defined as a well greater than 5 miles deep with a reach divided by depth ratio of less than 0.25, is increasingly becoming necessary to extract the remaining world oil reserves. The deeper depth of drilling presents challenges such as higher temperature, higher pressure, and extremely corrosive environments, all of which promote problems with corrosion fatigue of the drill string steel alloys. This project investigates the corrosion fatigue properties of drill string alloys S-135 and UD-165. Results of potentiodynamic and cyclic voltammetry experiments in 6.71M (42.7 percent) calcium chloride showed that both materials are susceptible to general and pitting corrosion. Defects, such as inclusions and pullouts, appear to play a role in initiating pitting. Phase two of this project will be to chemically (immersion tests) and electrochemically (potentiostatic tests) induce and grow pits on tensile fatigue samples and investigate how pit depth effects fatigue life.
Kyle Rozman graduated from Milwaukee School of Engineering, Milwaukee WI in 2008 with a BS in Mechanical engineering. Kyle is pursuing a Masters of Science in Materials Science at Oregon State University. Upon completion of his MS Kyle is looking forward to pursuing a Doctorate of Philosophy at OSU.
Tosapol Maluangnont Abstract:
Ternary graphite intercalation compounds (GICs) of alkalimetals and amines: Synthesis and Structure
This work presents the synthesis, structures, and compositions of ternary graphite intercalation compounds containing alkali metals and a variety of amines. These compounds show novel features rarely observed, or even reported for the first time, in GICs. Examples include (i) the formation of monolayer and bilayer arrangement of alkyl chains, and the associate transition; and (ii) the cation-dependent orientation of amines. Results contribute to the understanding of the attractive interlayer force within graphite. An attempt to exfoliate these GICs to graphene sheets will be discussed.
Tosapol Maluangont joined OSU Chemistry in 2007 after receiving a Master Degree in Chemistry from Chulalongkorn University in Thailand. His reserach focuses on the synthesis of ternary graphite intercalation compounds of alkali metals and organic cointercalates of technological relevance. He was the recipient of OSU Chemistry Teaching Award for winter 2009, and of Whiteley Fellowship in Materials Science for summer 2010.