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.specialfastenersbolt.com/nickel-200-fasteners-bolts-screws-nuts.html .