All surfaces
should be dried, cleaned and free from all contaminants. In
bonding of metals, the surface preparation of faying surfaces
stands alone as a basic absolute requirement for success.
Mechanical treatment such as sandblasting, abrading or sanding
are used for prior to joining adhesively because of simplicity
or economics; however, when compared with etchant processes,
the chemical treatments produced higher reliability and longer
service life in a bonded assembly.
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