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<p>Copied from old</p> <p><b>New page</b></p><div>[[Category: SOP]]<br /> <br /> <br /> =Electrochemical Impedance Spectroscopy=<br /> # This SOP discusses how to conduct an EIS test on a sample with an isolated, known surface area. This process was originally devised to test the heads of screws with various coating systems.<br /> <br /> =Safety=<br /> * Eye protection should be worn when handling glass.<br /> * Appropriate gloves, chemical PPE should be worn when handling liquids.<br /> * If you using a copper sulfate solution or any other irritant, take care to not spill or expose one&#039;s self to the liquid.<br /> * Avoid contact with liquids that have electricity running through them, do not put fingers within the vessel.<br /> <br /> =Procedure=<br /> [[File:EIS.JPG|350px|thumb|]]<br /> # Prepare samples for EIS Testing.<br /> # Add desired amount of the solution chosen to an electrochemical cell glassware<br /> # Add a magnetic stirrer<br /> # Connect the sample to a section of wire.<br /> # Lower the sample into the electrochemical cell glassware.<br /> # Position the sample so that the desired area is submerged in the solution.<br /> # Add the counter electrodes to the glassware<br /> # add the luggin probe<br /> #* Position the luggin probe close to the sample surface that is being tested<br /> # Turn the power supply on<br /> # Connect the power supply wires in the following order<br /> #* WE to the sample wire<br /> #* CE to counter electrode<br /> #* RE to reference electrode<br /> #* SE to the sample wire<br /> # Run an open circuit potential test, then potentiostatic test, then EIS test using the software.<br /> #* The potentiodynamic test should be -0.5V to 0.5V compared to open circuit<br /> ==Sample Preparation==<br /> * All Samples must have certain requirements to be compatible for EIS testing.<br /> *# Sample must be a conductive material.<br /> *# Sample must have an electrical connection to the power supply.<br /> *# Sample must have all non-conductive material removed at contact point to wire.</div>

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