An investigation of the effect of surface impurities on the adsorption kinetics of hydrogen chemisorbed onto iron. Annual status report, 1 January-31 December 1993

Technical Report · Fri Jan 01 04:00:00 EST 1993

OSTI ID:7198720

Shanabarger, M R

The goal of this program was to develop an understanding of heterogeneous kinetic processes for those molecular species which produce gaseous hydrogen degradation of the mechanical properties of metallic structural materials. Although hydrogen degradation of metallic materials is believed to result from dissolved protonic hydrogen, the heterogeneous hydrogen interface transport processes often dominate the kinetics of degradation. The initial step in the interface transport process is the dissociative chemisorption of the molecular species at the metal surface followed by hydrogen absorption into and transport through the bulk. The interaction of hydrogen with the surfaces of alpha-2(Ti3Al) titanium aluminide, gamma(TiAl) titanium aluminide, and beryllium were studied.

• Research Organization: California Univ., Santa Barbara, CA (United States)
• OSTI ID: 7198720
• Report Number(s): N-94-26643; NASA-CR--195213; NAS--1.26:195213; CNN: NCC2-63
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALKALINE EARTH METALS
ALLOYS
ALUMINIUM ALLOYS
BERYLLIUM
CHEMICAL REACTIONS
CHEMISORPTION
DISSOCIATION
DOCUMENT TYPES
ELEMENTS
EMBRITTLEMENT
HETEROGENEOUS EFFECTS
HYDROGEN
HYDROGEN EMBRITTLEMENT
IRON
KINETICS
METALS
NONMETALS
PROGRESS REPORT
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
TITANIUM ALLOYS
TRANSITION ELEMENTS