Surface Condition and Classification of Sheet Metal.

Measurements of the exoemission effect and affinity of electrons provide information concerning the effects exerted by cutting and noncutting methods and various surface treatment techniques on the condition of sheet metal surfaces. Experimental results show that the deformation of sheet metal cross sections in uniaxial stress and local deformations of the type which occur during grinding affect the surface condition in such a way that independently of the degree of deformation and time, there is a mathematically interrelated change of the exoelectronic emission and affinity that can be utilized in sheet metal classification.