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Galvanic corrosion of rivets

We are putting up a perforated, powder coated aluminum (Type 1200 h4) windscreen (approx. 100 meters x 6 meters high) fixed to a painted hot dipped galvanized mild steel frame work. The aluminum sheets (8x4) are riveted to the frame. We have to drill after galvanizing. What practical solutions are there to address galvanic corrosion issues? This screen is approx. 500 meters from the sea.

Ross Cowing
Bryco Metals - Sunset Beach, Cape Town, South Africa
2003

You can coat the exposed areas by using cold galvanizing compound ⇦ on eBay or Amazon [affil links] with high Zinc deposition ideally over 85%.

A high Gloss Cold Galvanizing coating is preferred as it also has excellent flexibility and scratch and chemical resistance

The product can be brushed applied or sprayed depending on the viscosity of the product.

Rishi Prakash
- Mumbai, India
2003

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