Method and apparatus for the measurement of the corrosion potential between a coated metal surface and a reference electrode
AssigneeMax-Planck-Institut fuer Eisenforschung GmbH
InventorsMartin Stratmann, Heinz Streckel
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Abstract
Method for the investigation of the condition of a corrodible surface coated with a polymer, wherein the corrosion potential at the corrodible surface is measured without contacting either the corrodible surface or the polymer coating by means of a Kelvin probe which measures the potential between the corrodible surface and a probe electrode. The potential difference reflects the corrosion potential and, thus, the corrosion condition of the polymer coated surface.
Claims2
A method of investigating the state of corrosion of a surface of a metal member provided with a coating which comprises a polymeric material, said method including the following steps:
- positioning a vibrating Kelvin type probe in spaced relationship at said coating, moving said Kelvin probe across said coated surface, and determining the potential between said metal and said probe during said movement.
Dependencies are inferred from the claim text.