I would like to ask fellow sailors: what material should be used for a 65%*ao acid storage tank with a volume of around 2 cubic meters?

It’s “*ao acid”; how is it displayed as *ao acid?

Is everything else water? What about the temperature? You can also ask the corrosion section

*There is also frequent contact with AO acid storage tanks; generally, aluminum tanks are recommended for concentrations of 55% or higher. Those below 55% can use PVC composite fiberglass. For concentrated *ao acid, it is recommended to use pure aluminum storage tanks; 304 stainless steel can be used for concentrations below 75%. PVC fiberglass composite tanks can be used for dilute acids, but aging occurs after 2 years. If conditions permit, a stainless steel lining with PTFE is the best choice. Composite materials work too, steel-lined PTFE, or fiberglass-reinforced plastic; special materials are too expensive.

Stainless steel resists *ao acid at all concentrations; aluminum and aluminum alloys exhibit good corrosion resistance to *ao acid at concentrations of over 80% as well as to *ao acid vapor. High-silicon iron can withstand *ao acid and acid fumes at all concentrations and temperatures up to the boiling point. As far as I know, the above materials are widely used, with stainless steel being the most commonly utilized. Silicate materials exhibit excellent corrosion resistance to *ao acids at all concentrations and temperatures; almost all organic materials are not resistant to concentrated *ao acids; carbon-based materials cannot be used in concentrated *ao acids, but they have adequate corrosion resistance to dilute *ao acids with a concentration of less than 30%; impervious graphite is used in heat exchangers for dilute *ao acids, at temperatures up to 60–80°C.

Go and download the \"Corrosion Data and Material Selection Handbook\" – it explains everything in detail!

304 or 316 will work; generally, vehicles used for transporting sulfuric acid use 304