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Friction and Wear of Iron in Corrosive MediaFriction and wear experiments were conducted with elemental iron exposed to various corrosive media including two acids, base, and a salt. Studies involved various concentrations of nitric and sulfuric acids, sodium hydroxide, and sodium chloride. Load and reciprocating sliding speed were kept constant. With the base NaOH an increase in normality beyond 0.01 N resulted in a decrease in both friction and wear. X-ray photoelectron spectroscopy (XPS) analysis of the surface showed a decreasing concentration of ferric oxide (Fe2O3) on the iron surface with increasing NaOH concentration. With nitric acid (HNO3) friction decreased in solutions to 0.05 N, beyond which no further change in friction was observed. The concentration of Fe2O3 on the surface continued to increase with increasing normality. XPS analysis revealed the presence of sulfates in addition of Fe2O3 on surfaces exposed to sulfuric acid and iron chlorides but no sodium on surfaces exposed to NaCl.
Document ID
19820012417
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Rengstorff, G. W. P. (NASA Lewis Research Center Cleveland, OH, United States)
Miyoshi, K. (NASA Lewis Research Center Cleveland, OH, United States)
Buckley, D. H. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
March 1, 1982
Subject Category
Metallic Materials
Report/Patent Number
NAS 1.60:1985
E-638
NASA-TP-1985
Accession Number
82N20291
Funding Number(s)
PROJECT: RTOP 506-53-12
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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