Corrosion
Corrosion
(OP)
I am looking for responses from engineers with expertise in corrosion.
Here is the situation. I have a steel tank buried in the ground. The tank was originally installed with paint, but the paint is probably not intact currently. The tank is partially (1/2) exposed to groundwater and ½ above the water table. The groundwater in the area of the tank has a low dissolved oxygen content because of biological activity. The biological activity was created by previous gasoline leaks in the subdurface and naturally occurring bacteria.
I am trying to figure out if corrosion will be increased by injecting oxygen into the groundwater. My thoughts are since the water is currently low in oxygen an oxygen concentration cell is present. By increasing the dissolved oxygen of the water will I be increasing, decreasing or not changing the rate of corrosion of the tank?
Thanks
Here is the situation. I have a steel tank buried in the ground. The tank was originally installed with paint, but the paint is probably not intact currently. The tank is partially (1/2) exposed to groundwater and ½ above the water table. The groundwater in the area of the tank has a low dissolved oxygen content because of biological activity. The biological activity was created by previous gasoline leaks in the subdurface and naturally occurring bacteria.
I am trying to figure out if corrosion will be increased by injecting oxygen into the groundwater. My thoughts are since the water is currently low in oxygen an oxygen concentration cell is present. By increasing the dissolved oxygen of the water will I be increasing, decreasing or not changing the rate of corrosion of the tank?
Thanks





RE: Corrosion
Regards CM
RE: Corrosion
Anyone have an opinion on my question?
Thanks
RE: Corrosion
Oxygen is necessary for oxidation.
It would seem to follow that increasing the available oxygen would increase corrosion.
RE: Corrosion
RE: Corrosion
TygerDawg
Blue Technik LLC
Advanced Robotics & Automation Engineering
www.bluetechnik.com
RE: Corrosion
I do not own the tanks and the owner will not be adding cathodic or other protection. I am trying to find out if my activities will affect the existing rate of corrosion.
Please Read the original question. i am not trying to solve the corrosion issue!!!!!
RE: Corrosion
RE: Corrosion
Regards,
Cory
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RE: Corrosion
This cannot be true. If you add more water you have less dissolved oxygen, therefore we are back to the original situation I described. Keep in mind, I in essence I have unlimited supply of water. Only a small portion is in contact with the tank.
Remember low dissolved oxygen (DO) water is corrosive. The question is, if the low DO situation, is more or less corrosive than high or "normal levels" of DO?
RE: Corrosion
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada