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Oxygen and sulfur interactions with a clean iron surface and the effect of rubbing contact on these interactionsAn investigation was conducted to determine the nature of the chemical interactions of oxygen and sulfur with iron when surfaces are stationary and also during sliding in a vacuum environment. Various gases that contained sulfur, oxygen, or both were adsorbed to iron at 23 C. The gases included oxygen, hydrogen sulfide, methyl mercaptan, and sulfur dioxide. Friction experiments were conducted with a hemispherical rider sliding on a rotating disk. An Auger cylindrical mirror analyzer was used to monitor the iron surface chemistry. The results of this study indicate that oxygen will completely displace sulfide films from iron surfaces. Organic thiols containing sulfur, such as methyl mercaptan, adsorb to an iron surface dissociatively. Only sulfur is detected on the iron surface. Sliding inhibits the formation of sulfide films on iron with the adsorption of hydrogen sulfide and methyl mercaptan. With oxygen and sulfur dioxide, the sliding process does not affect adsorption behavior.
Document ID
19740029567
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Buckley, D. H.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 7, 2013
Publication Date
October 1, 1973
Subject Category
Machine Elements And Processes
Report/Patent Number
ASLE PREPRINT 73LC-5B-4
Meeting Information
Meeting: Joint Lubrication Conference
Location: Atlanta, GA
Country: US
Start Date: October 15, 1973
End Date: October 18, 1973
Sponsors: American Society of Lubrication Engineers, American Society of Mechanical Engineers
Accession Number
74A12317
Distribution Limits
Public
Copyright
Other

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