electrochemical protection

2026-01-07View Original

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Electrochemical protection is a method that uses an external power source to polarize the metal, thereby changing its electrical potential and preventing corrosion. For metal materials to corrode, three conditions must be present, namely a potential difference ； b Presence of electrolytes ； c Interconnected (paths for electrons and ions). Cathodic protection using an external current, also known as forced cathodic protection, involves connecting the metal structure to be protected to the negative pole of a power source, so that a cathodic current flows through it. The anode serves as an insoluble auxiliary element; together, these two components form a galvanic cell that enables cathodic protection. The essence of this process is to cause the protected steel pipe to undergo cathodic polarization.

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electrochemical protection

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