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Welded zinc anode and cathode protection method

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Update time : 2023-03-20 16:24:02

The cathodic protection method of zinc anode is to connect a metal or alloy which is more likely to lose electrons to the protective steel equipment. For example: steel gate protection, some of the application of this method. It is a more reactive metal, such as zinc, attached to a steel gate. In this way, when electrochemical corrosion occurs, it is the more reactive metal than iron that is being eroded, and iron is protected. This method is used to prevent corrosion of the hull, etc., by placing a certain amount of zinc at the stern of the ship and below the waterline of the hull. At present, in addition to the protection of steel equipment in seawater or river, electrochemical protection is also applied to prevent the corrosion of cables, oil pipelines and chemical equipment. It's essentially a galvanic reaction. That's right. In cathodic protection, the protected is the cathode, and electrons flow from the sacrificed anode to the protected part (cathode), that is, electrons flow to the cathode. The protected part (cathode), the corrosive environment (electrolyte), and the sacrificed part (anode) constitute a chemical battery. In a chemical battery electrons (negative charge) flow into the positive terminal. So the protected part is the positive terminal. The statement is the same. The electrode where oxidation occurs is called the anode. In a galvanic cell, the anode is the negative electrode. The anode is positive in the cell. Corresponding to the cathode.

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