A ‘collector plate‘ is attached to a steel plate, pipe or vessels of a range of diameters. Diffusible hydrogen from the well defined zone between the steel surface and collector is ‘swept’ into a remote and highly sensitive analyser. Because hydrogen in air is highly diffusible the background hydrogen level is very low and stable. The enrichment of hydrogen brought about by sweeping a stable known flow of air across a steel surface is therefore a highly dependable way of determining the hydrogen flux emanating from the steel surface. The method and various equipment components carry granted and pending patents.
Hydrosteel allows non-intrusive in situ measurement of hydrogen permeation through steel with no fuss… even steel surface cleaning is minimal and in many cases is not required at all. The equipment offers highly sensitive and quantitative measurement of hydrogen flux over a wide dynamic range, rapidly and reliably. It is totally simple to use, and includes an extension arm for accessing steel up to six feet distant. Hydrosteel can be engaged at different test sites at half minute intervals in search of hydrogen flux. Detailed measurements can be made at minute intervals, for example along a length of pipe. Once a representative site has been found the hydrogen flux can be monitored, using either the battery power source, for up to 40 hr, or an external power source, longer term.