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US 11,029,273 B2Granted
Corrosion monitoring device
AssigneeHitachi, Ltd.
InventorRintarou Minamitani
Life of this patent
Estimating the term…
Abstract
A corrosion monitoring device includes: a sensor unit that includes an insulating substrate, a stainless steel plate disposed on the insulating substrate and is configured of stainless steel, an aluminum piece joined to the stainless steel plate and configured of aluminum having a lower corrosion potential than the stainless steel and smaller electrical resistivity than the stainless steel, and extraction electrodes coupled to the stainless steel plate; and an ohm meter that measures an electrical resistance of the sensor unit when a current flows in the sensor unit.
Claims7
A corrosion monitoring device comprising:
- at least one sensor unit that includes:
- an insulating substrate;
- a first metal layer disposed on the insulating substrate, the first metal layer being configured of a first metal;
- a second metal layer joined to the first metal layer, the second metal layer being configured of a second metal having a lower corrosion potential than the first metal and smaller electrical resistivity than the first metal layer;
- and
- a pair of electrodes coupled to the first metal layer;
- and
- a resistance measurement device that measures an electrical resistance of the at least one sensor unit when a current flows between the pair of electrodes.
5 more elements
Dependencies are inferred from the claim text.