Tag: Nickel 200 screw for caustic alkaline solutions

Nickel 200 Compared to Hastelloy for Caustic Solution

Q: I have a process utilizing a high concentration caustic solution of sodium hydroxide. Would C276 bolts be a good option for corrosion resistance.

A: They could be a possibility but you might want to also consider Nickel 200. Nickel 200 bolts find their niche in corrosion resistance to caustic alkaline chemicals. They should be a good fit for this situation.

Hastelloy C276 Bolts versus Nickel 200 Bolts

Q: Because Nickel 200 bolts have much higher nickel content than Hastelloy C276 does that mean they are more corrosion resistant than a Hastelloy bolt?
A: No. Though nickel content plays a huge role in corrosion resistance, however  there are other elements that contribute to the high level of corrosion protection of a Hastelloy C276 bolt. Hastelloy bolts contain materials like chromium and molybdenum which give it a higher level of general corrosion protection over a Nickel 200 bolt. Though Hastelloy C276 performs better in most hot acid situations, Nickel 200 bolts are known for its excellent performance in caustic alkaline solutions especially caustic soda.