Corrosion Grenade

Has anyone sold a Corrosion Grenade?
How well did they work?
I just happen to read a trade newspaper and it had a story about these Corrosion Grenade that are strapped to the suction line and they help prevent corrosion of the aluminum coils on the condensing units because there made out of zinc.
Here in Houston because of the chemical plants the A/C's break down fast and thought these might work. I went to their web page and don't know yet what to think about them.
I called a wholesaler and there priced right. -- Moe Jones HVAC Service Technician Energy Equalizers Inc. Houston, Texas
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.