Formation conditions and action mechanism of corrosion galvanic cells

2026-01-04View Original

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1. Conditions for the formation of a corrosion galvanic cell ① Contact between the electrolyte solution and the metal； ②There is a difference in electrode potential between different parts of a metal or between two metals ； ③The poles are connected to each other. 2. The three stages in the operation of a corrosion galvanic cell: ① Anodic process: The metal dissolves, entering the solution in ionic form, while leaving equivalent electrons behind on the metal. ②Electron transfer: In a circuit, electrons flow from the anode to the cathode. ③Cathodic process: The electrons flowing from the anode are accepted by oxidants in the solution that can absorb electrons, causing those oxidants to be reduced.

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Formation conditions and action mechanism of corrosion galvanic cells

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