1. Critical Defense in Extreme Corrosion Environments

Operational Challenges:

• Boiling acetic acid (99% HAc) with bromide catalysts (e.g., HBr)
• Temperature range: 120‑200°C (local hotspots up to 230°C)
• Aggressive ions (Cl⁻, Fe³⁺) accelerating pitting and stress corrosion cracking (SCC)

2. Zirconium Solutions:

• R60702 Castings: Reactor vessels, agitator blades (corrosion rate <0.025 mm/yr)
• Zr‑702C Enhanced Grade: Catalyst injection tubes (30% improvement in hydrogen cracking resistance)
• Zr‑Ta Gradient Cladding: Weld zone protection (tantalum as sacrificial anode)

3.Comparison of Material Properties:

• The corrosion rate of Hastelloy C276 in boiling acetic acid: 0.45mm/yr
• The corrosion rate of Zirconium R60702 under the same working conditions: 0.018mm/yr