I work in the water/wastewater industry and use hypochlorite (bleach) and gas chlorine alot. The were eating all of the mounts for our pumps. I had the welder fab some mounts and sandblasted them. As soon as i cleaned the sand off of them i sprayed them with some cold gal. spray and they lasted longer than anything we were buying! You have to compare and make sure you buy the stuff with the high zinc content.