A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Surface Topography and Surface Contaminants
Abstract Most surfaces of solids are rough, at least on a microscopic scale. Most engineering surfaces are covered by asperities having slopes in the range 5°–10°. Unlubricated metal surfaces encountered in an industrial environment will, in general, be covered by a whole series of surface films, as shown in Fig. 4.1. Working outwards from the metal interior, we first encounter an oxide layer, produced by reaction of oxygen from the air with the metal; this is present on all metals except gold. Next will come an adsorbed layer derived from the atmosphere, the main constitutes of this layer being water and oxygen molecules. Outermost, there will usually be grease or oil films. Note also that the metal just below the oxide layer is in general harder than that in the bulk (it is “work hardened”).
Surface Topography and Surface Contaminants
Abstract Most surfaces of solids are rough, at least on a microscopic scale. Most engineering surfaces are covered by asperities having slopes in the range 5°–10°. Unlubricated metal surfaces encountered in an industrial environment will, in general, be covered by a whole series of surface films, as shown in Fig. 4.1. Working outwards from the metal interior, we first encounter an oxide layer, produced by reaction of oxygen from the air with the metal; this is present on all metals except gold. Next will come an adsorbed layer derived from the atmosphere, the main constitutes of this layer being water and oxygen molecules. Outermost, there will usually be grease or oil films. Note also that the metal just below the oxide layer is in general harder than that in the bulk (it is “work hardened”).
Surface Topography and Surface Contaminants
Dr. Persson, Bo N. J. (author)
Second Edition
2000-01-01
8 pages
Article/Chapter (Book)
Electronic Resource
English
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