Aug 06, 2020 - 04:59 PM
The short answer is no. Galvanic corrosion can never occur in our Dielectric Fluids.
And here is the long answer..
We'll start with a quick primer on what causes galvanic corrosion and then we'll highlight exactly why this type of corrosion cannot occur in Engineered Fluids Dielectric Coolants:
Galvanic corrosion, also known as bimetallic corrosion, is an electrochemical process whereby one metal corrodes in preference to another metal that it is in contact through an electrolyte ( An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent)
Galvanic corrosion occurs when two dissimilar metals are immersed in a conductive solution (electrolyte) and are electrically connected. One metal (the cathode) is protected, while the other (the anode) is corroded. The rate of attack on the anode is accelerated, compared to the rate when the metal is uncoupled.
For example, if aluminum and carbon steel are connected and immersed in seawater, the aluminum will corrode more quickly, whilst the steel will receive protection. Galvanic corrosion can be prevented by:
- Removing the metals from the electrolyte
- Selecting materials with similar corrosion potentials.
- Breaking the electrical connection by insulating the two metals from each other.
- Applying coatings to both materials. The coating on the cathode is the most important and must be in good condition, otherwise the galvanic corrosion could be worsened.
- Separating the two materials by inserting a suitably sized spacer.
- Installing a sacrificial anode that is anodic to both metals.
Since our Dielectric Coolants are in fact dielectric (electrically non-conductive) our Dielectric Coolants cannot act as an electrolyte which means that there can’t be any galvanic corrosion when dissimilar metals are immersed in our Coolants and electrically connected..