What is the term for corrosion caused by the joining of two different metals?

The term for corrosion that occurs as a result of the joining of two different metals is known as bimetallic corrosion. This process takes place when two dissimilar metals are in electrical contact in the presence of an electrolyte, which can lead to accelerated corrosion of one of the metals. The dissimilar metals create a galvanic cell, with one metal acting as an anode (corroding) and the other as a cathode (protected).

Understanding bimetallic corrosion is essential for various applications in the distribution field, particularly in the selection of materials for pipelines and fittings to ensure longevity and stability of infrastructure. It highlights the importance of material compatibility in preventing premature failure due to corrosion, which can lead to leaks or structural issues in a distribution system.