Patent ID: 8926823
Filing Date: 2015-01-06
Classification: G01N

Abstract:
1. A method for signal generating and collecting data to detect and evaluate corrosion in a conductive metal subject beneath a protective coating, comprising the acts of: a) providing a voltage generator; b) attaching a metallic conductor to at least one connection point with said conductive metal subject to electrically connect it to said voltage generator, wherein said conductive metal subject is a pipeline; c) providing a carrier having thereon an assembly of: d) positioning said counter electrode and said reference electrode assembly in an electrolyte solution or wet carrier providing electrical conductivity between said counter electrode and said conductive metal subject beneath said protective coating with a voltage potential between it and said counter electrode, wherein said carrier and said counter electrode and said reference electrode are positioned not in direct physical contact with said conductive metal subject and yet within proximity of said conductive metal subject; and, e) providing a voltage potential through said electrolyte solution or wet carrier across said metallic conductor and said reference electrode; f) providing a first electrical signal from said voltage generator through an electrical circuit which includes said connection point and said conductive metal subject, said electrolyte solution or wet sponge, and said counter electrode; g) whereby said conductive metal subject becomes a working electrode; and h) collecting data from said first electrical signal and providing at least one display thereof to indicate corrosion of said conductive metal beneath said protective coating.