Material Construction

Material

316L stainless steel / Hastelloy® (e.g., C-276) / Alloy 20

Thickness

Customized (typically 3–6 mm for tubes, 8–12 mm for shell)

Anode Protection System

Reference Electrode

Ag/AgCl or Pt electrode

Cathode

Platinum-coated titanium or niobium

Potentiostat

Voltage range 0–2 V, current capacity 0–10 A (adjustable)

Operational Conditions

Design temperature

-20°C to +200°C

Operating temperature

80–120°C (for sulfuric acid cooling)

Design pressure

1.0–2.5 MPa (10–25 bar).

Test pressure

1.5× design pressure.

Flow rate (Acid side)

10–50 m³/h (depends on heat load).

Cooling medium (water/glycol):

Cooling medium (water/glycol): 20–80 m³/h.

Acid Concentration

93–99% H₂SO₄

Electrochemical Protection Parameters

Protection Potential

400–600 mV (vs. Ag/AgCl reference electrode for 316L SS in H₂SO₄)

Current Density

10–50 mA/m² (maintenance mode)

Polarization Time

Initial polarization: 2–4 hours

Physical Specifications

Heat Transfer Area:

50–500 m² (customizable)

Interface Connections

Acid inlet/outlet: DN50–DN200 (flanged, ANSI/ASME B16.5)

Cooling medium ports: DN65–DN150.

Insulation