introducing an oxidizing agent in the acid
not drawing current continously for long period
amalgamating the surface of the zinc plate
using a porous pot to isolate the zinc plate from the acid
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Local action is prevented in a simple electric cell by amalgamating the surface of the zinc plate i.e. rubbing of mercury over the surface of the zinc plate.
Ploarization is prevented by inteoducing a depolarizer i.e. an oxiding agent into the electrolyte which removes the hydrogen gas bubbles formed around the copper plate by oxidizing it to water.
Local action is prevented in a simple electric cell by amalgamating the surface of the zinc plate i.e. rubbing of mercury over the surface of the zinc plate.
Polarization is prevented by introducing a depolarizer i.e. an oxiding agent into the electrolyte which removes the hydrogen gas bubbles formed around the copper plate by oxidizing it to water.
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