2. Molybdenum-containing high-silicon cast iron is suitable for concentrated hydrochloric acid above 65℃ and below 80℃, but not for acid containing saturated chlorine and hydrochloric acid containing manganese dioxide. Ordinary high silicon cast iron is suitable for dilute hydrochloric acid below 65℃ and 10, but not for hot concentrated acid.
3. High nickel cast iron is suitable for very dilute (less than 10) room temperature hydrochloric acid.
4. Stainless steel is not suitable for all hydrochloric acid, and molybdenum-containing stainless steel is only used for extremely dilute hydrochloric acid solution.
5. High alloy stainless steel is also not resistant to hydrochloric acid corrosion.
6. Copper alloys, such as phosphor bronze and tin bronze, are suitable for hydrochloric acid and can resist hot acid at 100℃ and are used as hot acid pumps.
7. Monel alloy is suitable for high-temperature hydrogen chloride gas below 430℃ and resistant to mixed solution with a small amount of hydrochloric acid content.
8. Hastelloy is suitable for all hydrochloric acid, Hastelloy B is used for hydrochloric acid with various temperatures and concentrations, and Hastelloy C is used for dilute hydrochloric acid.
9. Phenolic aldehyde, furan, polytetrafluoroethylene, polytetrafluoroethylene, perfluoroethylene, propylene and chlorinated polyether are resistant to hydrochloric acid corrosion at the boiling point of full concentration.
10. Rubber is resistant to hydrochloric acid corrosion at 60 ~ 80℃.