Abstract: Known process for the metallization of non-conductors, particularly synthetic resins, by chemical deposition, evaporation, or sputtering operate with adhesion facilitating intermediate layers such as e.g. varnishes or pastes. There is not attained sufficient adhesiveness with these adhesion facilitators for many areas of use. Besides the adhesive facilitator can cause troubles in later processing. Therefore there is described a process in which the surface area to be coated is roughened by means of a preliminary etching before by the metallizing and wherein this surface area before the etching is exposed to a heavy ion radiation.

Abstract: A method and apparatus for ultrasonic nondestructive testing of workpieces include automatic compensation of echo responsive electrical signals commensurate with preprogrammed test parameters. The test parameters include at least one of the following: depth dependent correction of the individual DGS (distance, gain, size) values for each respective probe; correction for material related properties of the workpiece and coupling medium; correction for temperature affecting the testing of the workpiece. Preferably, a compensating signal generated commensurate with the sum of the correction signals is used for varying either the gain of a receiver amplifier or a predetermined level provided to a comparator circuit or both. Embodiments disclosed are applicable for processing both analog and digital echo responsive electrical signals.