Can you get electrolysis or galvanic corrosion if dissimilar metals come in contact with Weathering Steel?

Yes. Electrolysis is the decomposition of dissimilar metals in contact with each other, in the presence of an electrolyte, such as water.

It is advised that dissimilar metals, if necessary in the roofing application, be coated with a protective barrier or separated from the Weathering Steel. Runoff from dissimilar metals, such as from an aluminum chimney flashing, can contribute to corrosion and affect the patina of Weathering Steel.

It is recommended that stainless steel fasteners be used to attach Sierra Steeltiles for best performance and greatest longevity.