Prediction of Hydrogen Entry and Permeation in Metals and Alloys
Final rept. 1 Oct 1990-30 Sep 1993
PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF MATERIALS SCIENCE AND ENGINEERING
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This Grant focused on the investigation of the factors which affect hydrogen entry and permeation into metalsalloys that by themselves or in combination with other materials are used under conditions for which hydrogen embrittlement and cracking are a major concern. Factors that affect H entry include a broad range of metallurgical, environmental and interface properties such as adsorption, surface segregation, surface films and recesses in the surface. Research during this grant period focused on understanding how these parameters control hydrogen entry. The specific investigations included both aqueous and gas phase charging of hydrogen, utilizing primarily electrochemical techniques, in particular hydrogen permeation with the IPZ model, and microscopic methods in the case of aqueous phase charging, and ultra high resolution scanning tunneling microscopy STM in the case of gas phase charging.
- Industrial Chemistry and Chemical Processing
- Properties of Metals and Alloys