I run an impedance test with mild steel coated with polymer coating. The impedance is showing very abnormal pattern as shown in the pic. On the other hand, when I was running the same Nyquist test with stainless steel it is showing quite a normal graph. Can someone suggest me the real reason why the impedance data is showing very abnormal reading. Thank you.
Working electrode : Polymer coated mild steel sample.
Reference : Saturated calomel electrode
Counter : Graphite counter electrode
What kind of organic coating and electrochemical set up do you use. I think that you have a problem with parameters of your set-up - a high impedance of coating and small impedance od EIS apparatus.
stefan
This is a common behavior for thick and very resistive coatings.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Inorganic Materials
- Metals
- Alloys
- Steel