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What is the acid resistance of 304 stainless steel plate

04 Stainless steel plate is a versatile stainless steel material with stronger rust resistance than the 200 series stainless steel. High temperature resistance is also good, can be as high as 1000-1200 degrees. 304 stainless steel has excellent stainless corrosion resistance and good resistance to intergranular corrosion.



It also has good corrosion resistance to alkaline solutions and most organic and inorganic acids. The corrosion resistance of 304 is of course higher than that of 201, but 304 is not the best corrosion performance, you should choose 316 high nickel content.



304 stainless steel belongs to austenitic stainless steel: check "corrosion data and material selection manual": for 100% carbonic acid, not resistant to corrosion at 900 °C, excellent corrosion resistance below 900 °C; for carbon dioxide below saturated concentration, not Above 100 ° C, the corrosion resistance is excellent.



304 resistance to what medium is not resistant to any medium: 304 resistant to carbonate, wet hydrogen sulfide, high temperature S corrosion, low temperature lye, low temperature acetic acid is not resistant to halogen ions, even polysulfate, hydrochloric acid.



The reason for the corrosion resistance of 304 stainless steel plate: In terms of the addition process, the surface treatment of 304 is passivated by strong acid and alkali cleaning, and the effect is still quite good. At present, many industries choose industrial 98% concentrated sulfuric acid, 68% or more concentrated nitric acid. Or the corrosion inhibitor is more common, as the acid-alkaline identification of water, generally using water as a medium, participate in a certain proportion of acid-base solution.


Of course, the measurement of the PH range is mainly targeted. The 304 stainless steel plate, the manufacturer, the domestic, the import, and the composition content are affected by many factors. In addition, in terms of corrosivity, pitting corrosion, local corrosion, or corrosion time, corrosion environment, may affect 304's original good corrosion resistance.



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