Electrochemical measurements of components in coatings
US10948450B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 2018 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Dec 21, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2610/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed are methods of measuring moisture. Specifically, methods of measuring moisture on dry or nearly dry surfaces using an electrochemical sensor are disclosed. The method comprises applying a coating comprising an electrolyte to an electrode wherein water in the air can permeate the coating, applying a voltage to the electrode, detecting a current and, determining if the current indicates the presence of moisture. As a voltage is applied, oxygen in the water is reduced and produces a measurable signal. The method includes measuring the amount of or decrease of dissolved oxygen (in water) at the surface of the electrode over time. Reduction of oxygen acts as a surrogate for water/moisture and, as such, the dryness of the surface of the electrode is calculated based on a predetermined relationship between current and dissolved oxygen (in water). The method is also adapted to measure other target chemicals in a coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.