Depending on the size of the anode, put it with a silver/silver chloride reference cell in a seawater / 3% NaCl solution bath. Connect the anode to the negative terminal of a multimeter, and the reference cell to the positive. You should get readings between -980mV to -1050mV.
stanweld,
I'm sorry for the second question I asked. I made a mistake. Let me re-phrase it.
Would the passivation process of the stainless steel pipe (outer surface) be compromised, when it is buried underground and with application of CP (impressed / sacrificial)?
Thank you for your first...
Would stainless steel be cheaper than mild steel with excellent coatings? If not, what is the point of using stainless steel with cathodic protection.
Would the passivation process of the stainless steel pipe buried underground when it is fully polarised?
Thank you for your comments. This is...