System and method of use for electrochemical measurement of corrosion
First Claim
1. A method for determining the corrosion rates of galvanically coupled metals, said method comprising the steps of:
- coupling two dissimilar metals;
using electrochemical impedance spectroscopy to produce a plot of impedance and phase angle verses frequency for the coupled metals;
matching the coupled metal plot to a known plot for a given physical circuit; and
determining corrosion rates for the coupled metals based on corrosion rates associated with the matched plot.
2 Assignments
0 Petitions
Accused Products
Abstract
A system and method of use is provided for using electrochemical impedance spectroscopy to determine the corrosion rates of coupled metals. Two dissimilar metals are coupled together and exposed to a saltwater electrolyte in an electrochemical cell. A variable frequency current is passed through the cell and collected at the coupled metals. The impedance and phase angle of the collected current data are plotted verses frequency. The plotted data are compared to and analogized to a known plot for physical electric circuits. When a matching plot and circuit are found, the corrosion rate data associated with the matched plot are used to determine the corrosion rates of the coupled metals.
16 Citations
14 Claims
-
1. A method for determining the corrosion rates of galvanically coupled metals, said method comprising the steps of:
-
coupling two dissimilar metals; using electrochemical impedance spectroscopy to produce a plot of impedance and phase angle verses frequency for the coupled metals; matching the coupled metal plot to a known plot for a given physical circuit; and determining corrosion rates for the coupled metals based on corrosion rates associated with the matched plot. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification