Portable kits for rapid tests on stainless steel

摘要

The first possible test is the check of the passive state of stainless steel surfaces. The essential feature of these materials which gives them the-well known resistance to corrosion is the formation, on the surface, of a thin and transparent oxide layer, called passive film. By means of proper reagents it is, therefore, possible to verify whether the passive film is in the ideal condition to protect the material underneath.