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.

Nickel 200 Bolts for Sodium Sulfide & Sodium Hydroxide

Q: I work in a plant that manufactures paper. We’re treating pulp with a solution containing sodium sulfide and sodium hydroxide to dissolve the wood materials and produce cellulose to make paper. Can you suggest a material that can give our bolting some corrosion protection and better longevity. Some of the steels we are using are not lasting very long.

A: One of the best materials to consider for your alkali corrosion issues would be Nickel 200 bolts. Nickel 200 screws are highly resistant to alkaline solutions – especially sodium hydroxide. The only precaution would be to make sure there are no oxidizing chemicals (for example ferric chlorides) in your process as they can corrode Nickel 200 fasteners. You could learn more about nickel 200 fasteners at https://www.extreme-bolt.com/nickel-200-fasteners-bolts-screws-nuts.html.

Nickel 200 Bolts for Chlor Alkali Process

Q: I’m running a chlor alkali process to produce sodium hydroxide. We would like bolts that have a strong resistance to the NaOH. Should I try hastelloy?

A: In terms of caustic alkaline solutions, such as sodium hydroxide, your best bet would be Nickel 200 bolts which are known to have excellent resistance to all concentrations of caustic soda – even at high temperatures.