Galvanic Corrosion

Galvanic currents occur when galvanic corrosion takes place. The current generated by the electrochemical reactions between the two metals can lead to corrosion damage, especially in moist or acidic environments. These currents can result in the loss of metallic material, weakening of structures, and potential operational disruptions in electrical systems.

To prevent or minimize galvanic corrosion and galvanic currents, various methods can be used. A common approach is to use galvanically compatible materials, which means using metals that have similar electrochemical properties to reduce the potential difference. Other techniques include the use of corrosion-resistant coatings, insulation between different metals, and the use of sacrificial anodes, which are more prone to corroding and protect the main structure.

Galvanic corrosion and galvanic currents are important to understand and manage in many industries, including construction and the automotive industry, to ensure long-term durability and functionality of metallic structures and systems.

A key approach in combating galvanic corrosion involves utilizing cathodic protection systems, with the sacrificial anode emerging as a prominent solution. Crafted from a metal alloy boasting a more negative electrochemical potential than the protected metal (cathode), the sacrificial anode undergoes controlled corrosion, effectively hindering oxidation reactions on the structure's surface. Two essential prerequisites underpin the efficacy of this method, ensuring a symbiotic relationship between anode and cathode and precise material selection. This strategic deployment of sacrificial anodes presents a robust defense against galvanic corrosion, guided by electrochemical principles and engineered precision.

We are one of Scandinavia's leading suppliers of cathodic protection since 1989. Our headquarters are located in Ramlösa, Helsingborg, in southern Sweden.