Apparatus for measuring a coating on a plate
AssigneeFMC Corporation
InventorsHong Shih, Manuel S. Mekhjian
Life of this patent
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Abstract
The invention provides a method and apparatus for measuring the quality of a coating on a plate. The invention uses a method of measuring the impedance of a coating on a plate, which uses the steps of placing the coating on a plate in a chamber, and then placing a counter electrode in the chamber so that the coating lies between the plate and the counter electrode. A reference electrode is placed in the chamber so that the coating lies between the reference electrode and the plate, and the chamber is filled with a fluid with an ionic substrate. A potentiostat induces a voltage between the plate and the reference electrode, and impedance of the coating is measured to determine the quality of the coating.
Claims2
An apparatus for determining the quality of a coating on a plate of material, comprising:
- a chamber with an interior;
- a counter electrode within the interior of the chamber, wherein the counter electrode is formed by a plate;
- a reference electrode within the interior of the chamber;
- means for holding the plate of material substantially parallel to the counter electrode;
- a potentiostat with a counter electrode terminal electrically connected to the counter electrode, and a reference electrode terminal electrically connected to the reference electrode and a working electrode terminal electrically connected to the plate of material;
- a frequency response analyzer electrically connected to the potentiostat for determining the quality of the coating;
- and
- means for signaling a bad coating when a measured impedance of the coating is below a threshold impedance.
An apparatus for determining the quality of a coating on a plate of materials comprising:
- a chamber with an interior;
- a counter electrode within the interior of the chamber, wherein the counter electrode is formed by a plate;
- a fluid in the chamber wherein the fluid has an ionic substrate;
- a reference electrode within the interior of the chamber;
- means for holding the plate of material substantially parallel to the counter electrode;
- a potentiostat with a counter electrode terminal electrically connected to the counter electrode, and a reference electrode terminal electrically connected to the reference electrode and a working electrode terminal electrically connected to the plate of material;
- a frequency response analyzer electrically connected to the potentiostat for determining the quality of the coating;
- and
- means for signaling a bad coating when a measured impedance of the coating is below a threshold impedance.
Dependencies are inferred from the claim text.