4 ms·
Can someone tell me why rebar isn’t more often cathodically protected with electric current? I don’t think much power is required to resist corrosion, and it sh
by telotortium 1y ago
Can someone tell me why rebar isn’t more often cathodically protected with electric current? I don’t think much power is required to resist corrosion, and it shouldn’t be too hard to test for electric continuity in the field.
- ta988 1y agoHow do you do it at scale and without major transformations of the production lines. Now you need to handle liquids and electricity and your process is not as continuous.
- conradev 1y agoCan you do it with magnets?
- amluto 1y agoI can guess a few reasons: Cost. This may not be cheap. Rebar is often part of a structure’s electrical ground. Any protective current supplied might end up exiting through other connected grounds and doing little good. How do you do this on a bridge? The rebar is one electrode. Where’s the other? Even if you get it working, I would be a bit nervous about the reaction products. If there’s any current flow, then something is being reduced. If the medium is moist concrete, then it might well be water that gets reduced to hydrogen gas and hydroxide ions. The hydroxide ions may be harmless, but the hydrogen could be problematic.