Aluminum is corrosion resistant, but dents easily. The price fluctuates with this material, depending on the current price of aluminum.
Galvanized is strong, but not the most aesthetically pleasing. It can corrode, so soaking this type of metal needs to be taken with precaution.
Stainless Steel, though the most expensive option, is the strongest material in this list, making it the most dent resistant. It is also the least corrosive and the most stain resistant. it's also easier to clean and sanitize.
Certain city/county health codes only see one style as compliant; in other words, you’ll want to check your local codes to see if there is a certain metal type you need to stick with.
Lastly, keep in mind that if you have an open kitchen (often times for appearance) the mirror finish of steel/aluminum is best for show.
Answered on 8/12/2014 by Kasy Allen from Boulder, CO