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.