Anordning for korrosjonsdeteksjon.

摘要

A chamber (5) is closed by a pellet (4). The pellet is corroded by a substance, to which it becomes permeable. The refractive index of a fluid present in the chamber is measured. A light source (10) and a photodetector (11) measure the refractive index. A length of optical fiber is used for measurement, one end being located close to the pellet. The chamber contains air. The pellet is connected to a support resisting the pressure of the corrosive substance. The support is permeable to the substance. Pressure is equalized on both sides of the pellet.