Service life of the material
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304 stainless steel, reinforced polyethylene, reinforced polypropylene, fiberglass, or rubber-lined steel are used to construct the towers, with dilute nitric acid as the liquid phase – what is the service life of these materials?
OP, with so many materials together, it’s best to find a specialized assessment agency. That’s how it’s accurate.
What about the system temperature mentioned by the poster? Are there any other impurities? 304 stainless steel exhibits excellent corrosion resistance in dilute nitric acid free of chloride ions ； PE and PP can only withstand dilute nitric acid at concentrations of less than about 25%, and they are not suitable for use at high temperatures ； Glass fiber reinforced plastic is generally not resistant to dilute nitric acid ； Many rubbers determine their resistance to dilute nitric acid, with some only being able to withstand dilute nitric acid at concentrations below about 20% ； Other commonly used materials resistant to dilute nitric acid include PVC, which can withstand 60% concentration at room temperature.
Yes, as you said, the different environments or the length of time it is used all affect its service life
You can look up certain standards, such as national standards or ASTM standards, and there are definitely methods for accelerated aging to estimate the service life