Topic: Material Science
Perforation in Aluminum plate occurs when it is connected with the Mild steel plate and exposed to the same environment. This phenomenon is explained by
- A. Galvanic corrosion
- B. cold welding corrosion
- C. crevice corrosion
- D. high temperature corrosion
Answer: A. Galvanic corrosion
Explanation: When two dissimilar metals, such as an Aluminum plate and a Mild steel plate, are in contact with each other in the presence of an electrolyte (like an atmosphere containing moisture and oxygen), they form a potential galvanic cell. The more anodic metal (Aluminum) will preferentially corrode and can suffer perforation. This specific degradation phenomenon is known as galvanic corrosion.