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4.22 Discuss galvanic corrosion of aluminum. How can aluminum be protected from galvanic corrosion?

4.22 Discuss galvanic corrosion of aluminum. How can aluminum be protected from galvanic corrosion?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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4.22 Discuss galvanic corrosion of aluminum. How can aluminum be protected from galvanic corrosion?
Transcribed Image Text:4.22 Discuss galvanic corrosion of aluminum. How can aluminum be protected from galvanic corrosion?
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Step 1

What is Galvanic Corrosion of Aluminium?

 

Galvanic Corrosion is the corrosion induced when two different materials are coupled in corrosive electrolyte.

 

  • When  galvanic couples forms , one of the metals in the couple becomes the anode and corrodes faster than it would all by itself , while the other becomes cathode and corrodes slower than it would alone.

 

  • Galvanic Corrosion occurs when two unlike metals are in close enough proximity to each other that they form galvanic cell .

 

  • Actually electrons flow anode to cathode and a galvanic cell is set up.

 

  • Which results anode undergoes oxidation and forms corresponding ions and passes into solution and that's why metal gets corroded.

 

  • Aluminium is  in anodic in nature means it protects steel from rusting, so it get self corroded  
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