Acetic acid medium: It is one of the substances with strong corrosiveness in organic acids. Ordinary steel will be severely corroded in all concentrations and temperatures. Stainless steel is excellent acetic acid -resistant material. 316 stainless steel containing molybdenum can also be suitable for high temperature And dilute acetic acid steam. When high temperature and high -concentrated acetic acid or other corrosive media, high alloy stainless steel or fluoroplastic pumps can be selected.
Alkali (sodium hydroxide): Snacks are widely used below 80 ° C, sodium hydroxide solution within 30%concentration, and many petrochemical factories still use ordinary steel at 100 ° C and 75%. Good sex. The corrosion resistance of ordinary stainless steel to alkali solution has no obvious advantages compared with the cast iron. As long as a small amount of iron is mixed in the medium, it is not recommended to use stainless steel. For high temperature alkali, titanium and titanium alloy or high alloy stainless steel are mostly used.
