I plan on building a power rack for my home gym and was wondering what kind of metal/coating I should use when building it since it will be stored outdoors. Most commercial power racks are built using mild steel and are coated with paint to protect it from rust. These racks should last when used indoors but I'm not so sure if it will when it is kept outdoors.
If I were to build my power rack from mild steel, how should I go about protecting it from rusting? While the rack will stay outdoors, it will be situated under some kind of shade/tent similar to this:
The power rack will stand over concrete or plywood (over concrete), not grass/soil.
With these details in mind, can anyone suggest how I should treat/coat the mild steel? I've taught of powder coating it but again, I'm not sure how that would hold up. How about chroming? Is it too expensive/overkill?
How about using something similar to the following:
These are pictures of my old bench. Since the bench is still standing strong after so many years, I take something like its material would be appropriate for my use case. What do you call this kind of metal/coating, anyway? What properties does it have and is it difficult or expensive to produce/replicate?
Please provide details as to why I should prefer each method over the other. If you would prefer to use some other kind of metal(stainless steel, galvanized steel, aluminum etc), please state why. I tried Google-ing the pros and cons of each method of coating I stated above but I'm still unable to reason out to myself which one to use. If all of them would equally serve the purpose, I guess it will all boil down to which one is the most cost-effective to produce.