UNIT OF INDICATORS OF CORROSION RATE OF UNDERGROUND METAL STRUCTURES Russian patent published in 2001 - IPC

FIELD: anticorrosion protection of underground metal structures. SUBSTANCE: unit of indicators of corrosion rate of underground metal structures has at least three indicators of corrosion rate having various thickness and width not less than 2.0 mm connected with one end to test plate. Indicators and test plate are manufactured from same material as underground metal structures. Indicators are arranged at distance of 3.0 mm as minimum one from another. Test conductors with pointers of thickness of indicators of corrosion rate are connected to test plate and opposite ends of indicators. Internal surface of indicators of corrosion rate is insulated by anticorrosion coat. Unit of indicators of corrosion rate and test plate are built in dielectric case. EFFECT: increased authenticity of diagnostics of corrosion condition of external surface of pipe-line without electrochemical protection and of test of efficiency of electrochemical protection of underground pipe-lines against outer corrosion. 3 dwg