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Which of the following is an example of cathodic protection?

Which of the following is an example of cathodic protection? Correct Answer Electroplating of steel, galvanization of steel and magnesium connected to steel

Electroplating and galvanization are cathodic protections of steel based on the galvanic effect. If steel under zinc or other metal coating exposed to corrosive atmosphere, zinc corrodes preferentially than steel. Magnesium acts as a sacrificial anode when it is connected to underground steel pipes.

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