PASSI TEST Plus is a tool designed for those who need to know exactly the real quality of stainless steel. It consists of a “probe pen”, which contains the electrochemical solution, and an external storage unit. By pressing the probe pen on the surface, Passi Test Plus measures and stores data on the open-circuit potential and nobility of a metal, thus measuring its corrosion resistance.
The test, neither destructive nor harmful, is fast (the result is obtained in 15 seconds) and numerical: while other passivation tests, which are purely chemical, are based on the interpretation of a color (ferrocyanide test), giving a highly subjective figure that is often distorted by surface impurities, PASSI Test Plus releases an exact and unopinionable numerical value.
The Passi Test Plus system is calibrated with zero as its discriminating point: if the value is higher than zero, then the stainless steel is passivated; if the value is lower than zero, then passivation is either scarce or non-existent. As such, it is possible to compare different kinds of stainless steel: the higher than zero is the value, the better the passivation of the sample; the lower than zero is the value, the worse is the passivation of the tested stainless steel.
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