Tag Archives: Hastelloy Bolts

Hastelloy: Fasteners for phosphoric and sulfuric acid process

Posted on January 23, 2018 by dean

Q: I’m using a pretty corrosive wet process to produce phosphoric acid. It involves taking phosphate rock and the addition of concentrated (93%) sulfuric acid in a series of well-stirred reactor. Any ideas on bolting that won’t corrode my bolts and fasteners? A: Since your process is exposed to both … Continue reading →

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Bolts for Steel Pickling in HCl: Hastelloy and Tantalum

Posted on January 22, 2018 by dean

Q: I’m using HCl in a pickling process and have used Hastelloy C276 bolts to protect my equipment but am still having corrosion issues. Any ideas? A: In pickling processes ferric chloride is created which is a strong oxidizer and most pickling process are at elevated temperatures – Hastelloy C276 … Continue reading →

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