How to Calculate Galvanic Corrosion
What is Galvanic Corrosion?
Galvanic corrosion occurs when dissimilar metals contact in electrolyte; more active metal (anode) corrodes preferentially.
Step-by-Step Guide
- 1Input two metals and galvanic series position
- 2Calculate galvanic potential
- 3Determine which metal corrodes and rate
Worked Examples
Input
Zinc (anode) + steel (cathode) in seawater
Result
Zinc sacrificially corrodes, protecting steel (intentional use)
Common Mistakes to Avoid
- ✕Assuming only one metal corrodes (wrong)
- ✕Not understanding sacrificial anode concept
Frequently Asked Questions
How do you prevent galvanic corrosion?
Use same metal, isolate with non-conductive gasket, or apply protective coating.
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