- #1
Sgta
- 2
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Hi,
I am a Chemical Engineer but a novice in electrochemistry; hence the query might sound very basic to everyone.
We have an industrial electrochemical process (With Iron anode) and we are conducting a lab experiment to understand what is the effect of electrolyte pH on corrosion rate of Iron (this will include corrosion + electrochemical dissolution). The experiment involves using electrolyte at different pH values galvanostatically in a stirred cell (using a potentiostat) on a known weight of Fe electrode and measuring the weight loss after a period of 2-3 hours of galvanostatic operation. The working electrode in the lab is of course, the Anode (Fe).
My issue relates to the potential being measured in the lab. In our plant, the potential difference between our electrodes is between 3-4 V. In the lab experiment, the potential measured by the reference electrode is close to 6-7 V.
This makes me question :
a) Is our lab experiment at all happening under the same conditions as the plant? Since the potential is different, the corrosion/passivity reactions occurring on the lab Fe electrode might be very different from the plant.
b) If a) is right, do I need to ensure that the voltage in the lab stirred cell is close to the voltage in the plant.
Thanks,
Sgta
I am a Chemical Engineer but a novice in electrochemistry; hence the query might sound very basic to everyone.
We have an industrial electrochemical process (With Iron anode) and we are conducting a lab experiment to understand what is the effect of electrolyte pH on corrosion rate of Iron (this will include corrosion + electrochemical dissolution). The experiment involves using electrolyte at different pH values galvanostatically in a stirred cell (using a potentiostat) on a known weight of Fe electrode and measuring the weight loss after a period of 2-3 hours of galvanostatic operation. The working electrode in the lab is of course, the Anode (Fe).
My issue relates to the potential being measured in the lab. In our plant, the potential difference between our electrodes is between 3-4 V. In the lab experiment, the potential measured by the reference electrode is close to 6-7 V.
This makes me question :
a) Is our lab experiment at all happening under the same conditions as the plant? Since the potential is different, the corrosion/passivity reactions occurring on the lab Fe electrode might be very different from the plant.
b) If a) is right, do I need to ensure that the voltage in the lab stirred cell is close to the voltage in the plant.
Thanks,
Sgta