I am on a research which deals with service life prediction due to chloride laden corrosion. Within my lab experiments, I need to measure the corrosion current density. For that I intend to use the Linear Polarization Resistance method.
But, my lab facility lacks linear polarization device, nor a potentiostat equipment. In that case, would I be able to make one to measure the polarization resistance of the corroding rebar?
I want to measure the current for different polarization values to obtain the Polarization resistance. Please follow the attached plot.
You can build your own potentiostat using an Op amp circuit with a few resistors. If you google potentiostat and op amp you will find a number of options. Here is the first one that I looked at: http://electronics.stackexchange.com/questions/59913/potentiostat-circuit-components
Thanks Stephen.
What you have sent is exposed to gas. Can this be utilized to measure the corrosion current in terms of microAmps/sq.cm ?
Thanks for your thoughts.
Yes, but it depends upon the selection of the op amp IC. If you get the right chip and modify the circuit just a bit, it is possible to design one that can measure pA. But to do that, you probably need to consult with an electronics engineer or tech,
Do you have a source meter (Keithley) ? A source meter may be used to generate i-V plots.
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