Does a Shaft Brush Help Prevent Corrosion?

Brass Shaft Brush Connected to Metal Hull Does this Really Work? We received a good query from reader Gerry this week that is worth sharing a bit of discussion on. The photo he sent in is on his aluminum hulled sailboat. What you see in the photo is a flat brass bar that someone applied some solder to (the grey stuff at the end and rubbing against the prop shaft). The other end of the brass bar is simply screwed to the aluminum cross piece you see running under the shaft. The brass bar gets ...