Galvanic Reaction Chart
Below is a galvanic reaction chart for dissimilar metals. This chart is designed to assist in broadly assessing the risk of galvanic corrosion associated with a given metal coming into contact with another metal.
To Use This Chart:
- Align the metal to be assessed for the risk of corrosion in the rows (Coordinating Metal) with the Contact Metal (columns).
- Green represents a LOWER RISK*.
- Red represents a HIGHER RISK*.
For a more specific assessment of the risk of galvanic corrosion, please reference other sources. There is a link to download the PDF with this information and chart below the table.
It should be noted that if sacrificial plating is incorporated into the fastener design, then galvanic action can result in the deterioration of the sacrificial coating, rather than of the fastener. We would advise that the suggested fasteners for dissimilar-metal applications would incorporate our GrabberGard® coating which utilizes both barrier and sacrificial coatings to minimize the chance and/or rate of corrosion. The barrier coating used to encapsulate the base steel and zinc layer plus anti-corrosion chemical bonding agents minimize the opportunity for contact to occur, thereby further minimizing the risk of corrosion.
* Please understand that green represents "lower risk" not "no risk."
Information contained herein is furnished without charge or obligation and is given and accepted at the recipient’s sole risk. Because conditions of use may vary and are beyond our control, Grabber Construction Products makes no representation about, and is not responsible or liable for, the accuracy or reliability of data associated with uses of any product described herein. Grabber Construction Products reserves the right to modify this communication without prior notice.