Galvanic corrosion, also known as bimetal corrosion or dissimilar metal corrosion, refers to two dissimilar metals in the presence of electrolyte coupling and corrosion damage.
Therefore, this means that three conditions must be met before galvanic corrosion is of concern: the multiple metals must have different electrode potentials or nobleness.
The greater the difference, the greater the risk of galvanic corrosion.
These metals must have been electrically contacted.
Contact with an electrolyte - such as salt water - must occur. In this process, one metal - the anode - will corrode faster than the other, the cathode, will corrode slower than the other.
