Anti-corrosion protective systems containing zinc

Sacrificial anodes

A sacrificial anode is a zinc part used to protect another metal element from corrosion, by being oxidised in its place.

Sacrificial zinc anodes, attached to ship hulls, oxidise instead of steel and protect ship hulls as long as they are not completely oxidised.

Contrary to other anti-corrosion systems containing zinc and forming a barrier between steel and electrolyte/water, an anode changes the electrochemical potential. The cathode becomes an anode.

ISO 2063 Standard

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