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HAYNES® Alloys

Aqueous Corrosion Resistance

HAYNES 25 alloy was not designed for resistance to corrosive aqueous media. Representative average corrosion data are given for comparison. For applications requiring corrosion resistance in aqueous environments, ULTIMET® alloy and HASTELLOY® corrosion-resistant alloys should be considered.

Alloy Average Corrosion Rate, per year
1% HCl (Boiling) 10% H2SO4 (Boiling) 65% HNO3 (Boiling)
- mils mm mils mm mils mm
ULTIMET® <1 <0.03 99 2.51 6 0.15
C-22® 3 0.08 12 0.30 134 3.40
25 226 5.74 131 3.33 31 0.79
316L 524 13.31 1868 47.45 9 0.23
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