Device and method for the coulometric measurement of the thickness of metallic coatings

摘要

A device for coulometric measurement of the thickness of metallic coatings comprises a measuring probe (11) and a reversing pump device (12) with the aid of which the electrolyte liquid can be conveyed out of a storage chamber (19) of the measuring probe (11) into the measuring chamber (17) thereof, and back again. The measuring probe (11) forms with the reversing pump device (12) a functional unit which can be jointly coupled to the stand arrangement (13) and be uncoupled again. In this case, the pump drive (14) remains on the stand arrangement (13). It is therefore possible easily and quickly to change measuring probes which are filled and ready for operation, as a result of which the rapid measurement of a plurality of successive coatings on one measurement object can be carried out. The functional unit of measuring probe and reversing pump device prevents the electrolyte liquid from escaping in an undesired way. By means of a compression spring (56), it is guaranteed in addition that the electrolyte is automatically sucked into the storage chamber (19) if unintentional separation from the pump drive (14) occurs. <IMAGE>