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A sacrificial anode is used to send stary current to ground through the anode. This wiil cause the anode to be eaten away saving the pipe from this effect. If you put two dissimilar metels together like brass and iron, it can make a weak battery and make a current. Some soils or other environments can cause this effect.

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17y ago

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How pipe flanges are electrically insulated?

Pipe flanges are protected from corrosion by means of electrolysis,with dielectric flanges. The piping system is electricaly insulated by what is called a sacrificial anode. A bag of readily corrodable metal is buried in the ground with a wire running from the pipe to the bag so that the sacrificial anode will corrode first. If any electrical current charges the pipe it also serves as a ground.


Can we connect copper cable between iron and sacrificial zinc?

Will that work to eat up the Zinc(anode) instead the iron pipe ?Will the copper lead the ions to the zinc, or its resistivity will jeopardize the sacrificial protection combination ?thank you


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