Continuous measurement of test piece pickling loss - for determination of optimum conditions by measurement of hydrogen evolution in thermal conductivity detector (OE150976) (NL021176)

摘要

In a process for continuous determination of H2 freed in acids during pickling of metal test pieces, partic. steel, and picling loss, part of a carrier gas of different M.W. from H passes in continuous stream over pickling bath surface containing test piece and gas mixture passes to thermal conductivity detector, while part is supplied direct to detector so that voltage bridge in the detector measures and records voltage curve continuously, such that area under the curve is proportional to pickling loss of test piece. Process is used for determination of pickling conditions for different batches of steels e.g. used for enamelling and is superior to atomic adsorption of pipette sampling techniques by being insensitive to bath Fe content and not subjective.