Wrought, nickel-based alloy with enhanced resistance to wet-process phosphoric acid and crevice corrosion
AssigneeHaynes International, Inc.
InventorsPaul Crook, Vinay Deodeshmukh
Life of this patent
Estimating the term…
Abstract
A nickel-based alloy containing 37.35 wt. % to 38.96 wt. % chromium, 6.45 wt. % to 8.56 wt. % molybdenum, 0.06 wt. % to 1.58 wt. % iron, 0.115 wt. % to 0.275 wt. % aluminum, 0.12 wt. % to 0.44 wt. % manganese, 0.154 wt. % to 0.247 wt. % nitrogen, up to 0.050 wt. % silicon, up to 0.015 wt. % carbon, and the balance nickel has improved corrosion rates in 54% and 68% “wet-process” phosphoric acid at 121° C. and is resistant to chloride-induced crevice attack.
Claims3
A nickel-based alloy having improved corrosion rates in 54% and 68% “wet-process” phosphoric acid at 121° C. and is resistant to chloride-induced crevice attack, consisting essentially of:
- 37.35 wt. % to 38.96 wt. % chromium,
- 6.45 wt. % to 8.56 wt. % molybdenum,
- 0.06 wt. % to 1.58 wt. % iron,
- 0.115 wt. % to 0.275 wt. % aluminum,
- 0.12 wt. % to 0.44 wt. % manganese,
- 0.154 wt. % to 0.247 wt. % nitrogen,
- up to 0.050 wt. % silicon,
- up to 0.015 wt. % carbon, and
- balance nickel.
Dependencies are inferred from the claim text.