Particle analysis for corrosion rate monitoring
AssigneeConocoPhillips Company
InventorsOmar Jesus YEPEZ, Ricky Eugene SNELLING
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Abstract
Methods and apparatus relate to measuring corrosion rate. Corrosive fluid contacts a metal powder altering physical properties of the metal powder due to resulting corrosion thereof. For example, the corrosion diminishes mass of the metal powder reducing particle size and particle surface area of the metal powder. Since these physical properties of the metal powder are indicative of the corrosion rate, analysis of the metal powder provides the corrosion rate based on difference in the property of the metal powder before and after the contact with the corrosive fluid.
Claims20
A method, comprising:
- contacting a metal powder with a corrosive liquid, wherein the metal powder has an average particle size less than 100 microns;
- measuring a property of the metal powder to provide a measurement taken after the contacting of the metal powder with the corrosive liquid;
- and
- determining a corrosion rate of the metal powder within the corrosive liquid based on a difference between the measurement and an initial value for the property before the contacting of the metal powder with the corrosive liquid.
A method, comprising:
- contacting a metal powder with a corrosive liquid;
- measuring particle sizes of the metal powder by light diffraction analysis after the contacting of the metal powder with the corrosive liquid;
- and
- determining a corrosion rate of the metal powder within the corrosive liquid utilizing an initial value for the particle sizes and a measurement obtained by the measuring of the particle sizes to assess change of the metal powder caused by corrosion.
A method, comprising:
- contacting a metal powder with a corrosive liquid;
- analyzing the metal powder contacted with the corrosive liquid to provide a measurement for surface area of the metal powder obtained as a function of particle size distribution;
- and
- determining a corrosion rate of the metal powder within the corrosive liquid utilizing an initial value for the surface area before the contacting of the metal powder with the corrosive liquid and the measurement of the surface area.
Dependencies are inferred from the claim text.