High-pressure reactors are commonly used for reactions involving strong corrosion, high temperatures, or high purity. Material selection directly impacts equipment safety and lifespan. Below is a key comparison between stainless steel and four common non-ferrous metals:

1. Stainless Steel (304/316L): Suitable for neutral or weakly corrosive environments; relatively low cost; suitable for general pressurized reactions.

2. Titanium and Titanium Alloys: Resistant to chloride ions, dilute sulfuric acid, and seawater corrosion; suitable for wet chlorine environments. However, not resistant to pure reducing acids at high temperatures.

3. Hastelloy (C276/B3, etc.): Overall corrosion resistant, especially to hydrochloric acid, sulfuric acid, and wet chlorine. Suitable for mixed acids and strong reducing media; a "universal inner tank" for high-pressure, complex environments.

4. Zirconium (702/705): Resistant to almost all organic acids, strong alkalis, and high-temperature, high-concentration hydrochloric acid; performance superior to titanium and Hastelloy, but the highest cost.

5. Nickel and Monel/Inconel

Monel: Resistant to seawater.

Inconel: Resistant to high-temperature oxidation and chloride ion stress corrosion, suitable for high-pressure hydrogen-containing environments.

Core Selection Principles: Provide accurate media composition, temperature (°C), chloride ion concentration (ppm), and pH value. For example, in a 220°C, 30% hydrochloric acid environment, conventional stainless steel will fail within a few hours; zirconium or Hastelloy alloys must be selected.

Maintenance Tips: Iron ion contamination must be strictly prohibited during welding of non-ferrous metal reactors; the maximum allowable working pressure must be verified according to the material before high-pressure use.