The surface of the stainless steel open plate is smooth and has high plasticity, toughness and mechanical strength, and is resistant to corrosion by acids, alkaline gases, solutions and other media. It is an alloy steel that is not easily rusted, but it is not absolutely rust-free. The corrosion resistance of the stainless steel open plate mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, etc.) and the internal structure, and the main function is chromium. Chromium has high chemical stability and can form a passivation film on the steel surface to isolate the metal from the outside, protect the steel plate from oxidation, and increase the corrosion resistance of the steel plate. After the passivation film is destroyed, the corrosion resistance is lowered. The 304 stainless steel open plate is a versatile stainless steel material with stronger rust resistance than the 200 series stainless steel. It is also better for high temperature resistance. The 304 stainless steel open plate has excellent stainless corrosion resistance and good resistance to intergranular corrosion. For the oxidizing acid, it is found in the experiment that the 304 stainless steel open plate has strong corrosion resistance in the nitric acid below the boiling temperature of ≤ 65%. It also has good corrosion resistance to alkaline solutions and most organic and inorganic acids.