1. 304 Stainless Steel

Applications:

Neutral, low-salt, low-corrosion wastewater

Washing water, cooling water, ordinary grinding wastewater

No chlorine, no strong acids or alkalis

Advantages: Low cost, strong versatility

2. 316L Stainless Steel (most commonly used in the industry, highest cost-performance ratio)

Applications:

Electroplating wastewater, anodizing, phosphating wastewater

Saline, weakly acidic, containing a small amount of chloride ions

Cutting fluid, emulsion, machining wastewater

Chemical neutral / weakly alkaline high-salt wastewater

Advantages: Salt-resistant, resistant to weak acids and alkalis, strong corrosion resistance, long service life

90% of industrial wastewater uses 316L.

3. Duplex Steel 2205 / 2507

Applications:

High-chlorine, high-salt, highly corrosive chemical wastewater

Seawater, concentrated water from circulating water

Working conditions prone to pitting and stress corrosion

Advantages: Extremely strong resistance to chloride ion corrosion

4. Titanium Materials TA2 / TC4

Applications:

Strong acids (hydrochloric acid, fluorine-containing media)

High-chlorine, strong corrosion, working conditions that 316L cannot withstand

Pharmaceuticals, fine chemicals, special electroplating

Advantages: Super strong corrosion resistance, no scaling, extremely long service life

5. Lined Teflon / PP / FRP

Applications:

Highly corrosive, strong acid, high-concentration chemical wastewater

Extremely low budget, small equipment

Disadvantages: Poor thermal conductivity, low heat exchange efficiency, not resistant to high temperatures