What is the difference between galvanic corrosion and electrochemical cell corrosion?
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What is the difference between galvanic corrosion and electrochemical cell corrosion?
Cathodic corrosion occurs when two different metals or alloys are connected in an electrolyte to form a cell, resulting in accelerated corrosion of one of the metals or alloys while the other is protected； Galvanic corrosion refers to the corrosion that occurs on the surface of metals or alloys due to the presence of micro-cells, usually resulting from potential differences in local areas caused by impurities, stress, grain boundaries, etc. In general, galvanic corrosion emphasizes the interaction between different metals, whereas electrochemical corrosion focuses on corrosion caused by unevenities within a single metal. .