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Tag Archives: Sulfuric Acid
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 →
Posted on January 18, 2018 by dean
Q: I’m operating a FGD (Flue Gas Desulphurization) plant and am experiencing some mild corrosion on my scrubber bolting. I’m currently using Incoloy 825 bolts. It’s mild corrosion but non-the-less I’d like to have it cleared up before I get additional issues. Any suggestions? A: Since scrubber liquids and gases … Continue reading →
Posted in Application, Corrosion Resistance, FAQs, Material, Specialty Metal Fasteners | Tagged Alloy 825, Alloy C276, FGD, FGD scrubber corrosion, FGD slurry corrosion, flue gas corosion resistance, flue gas desulfurization, Hastelloy C276, Incoloy 825, Inconel, Sulfuric Acid, Sulfuric Acid Corrosion, sulfuric acid protection | Leave a comment
Posted on January 3, 2018 by dean
Q: I’m running a lithium extraction process where a mineral called spodumene is roasted in a mixture of sulphuric acid (95-97%) at at about 150°C to form lithium sulfate. I’ve to use Hastelloy C276 for some process equipment but I’m still experiencing corrosion. Please help. A: Hastelloy C276 bolts typically … Continue reading →
Posted in Application, Corrosion Resistance, FAQs, High Temperature Resistance, Material, Specialty Metal Fasteners | Tagged Alloy C276, H2SO4, Hastelloy, Hastelloy C276, high temperature H2SO4, high temperature sulfuric acid, hot acid corrosion, Hot Acids, Hot Sulfuric Acid, Lithium Extraction, spodumene, Sulfuric Acid, Sulfuric Acid Corrosion, tantalum | Leave a comment
Posted on December 12, 2017 by dean
Q: I’m running a municipal solid waste incinerator and am having trouble with corrosion from a combination of hydrochloric acid and sulfuric acid that is derived from chloride and sulfur containing compounds in the waste fuel stream. I was using Duplex steel bolts for the chloride corrosion but they aren’t holding … Continue reading →
Posted in Application, Corrosion Resistance, FAQs, Material, Specialty Metal Fasteners | Tagged Alloy C276, Bolts, chloride condensation, H2SO4, Hastelloy, Hastelloy C276, HCl, Hydrochloric Acid, incinerator, municipal waste, Nickel Alloy, screws, solid waste incinerator, Sulfuric Acid, waste fuel stream | Leave a comment
Posted on November 16, 2017 by dean
Q: I’m running a hydro-treating process that is running at 350-390°C where we’re producing H2S and NH3. Any ideas on a bolt that can handle the temperature and chemicals? A: In this type of process you having to deal with high temperatures and the formation of sulfuric acid (H2SO4) from the H2S especially … Continue reading →
Posted on November 2, 2017 by dean
Nickel alloys are a special class of metals containing high levels of nickel (often greater than 20%). They play a key role in industry for their unique combination of high strength, corrosion resistance to harsh acids (like hydrochloric and sulfuric) and high temperature stability. This two-part newsletter will help summarize the distinct benefits of the … Continue reading →
Posted in Application, Blog, Corrosion Resistance, Material, Specialty Metal Fasteners | Tagged AL-6XN, AL6XN, Alloy 20, Alloy 400, Alloy K500, Carpenter 20, Corrosion, corrosion resistance, Monel, Monel 400, Monel K500, nickel, nickel alloys, Salt Water Resistance, Sea Water Resistance, Specialty Metals, Sulfuric Acid | Leave a comment
Posted on August 28, 2017 by dean
Q: Inconel 625 and Hastelloy C276 bolts seem to have similar Nickel content. Does this mean these fasteners will perform the same in a corrosive environment? A: Inconel 625 and Hastelloy C276 bolts do offer similar corrosion resistance but Hastelloy C276 has a slight edge in many acidic environements, especially … Continue reading →
Posted in Application, Corrosion Resistance, FAQs, Material, Specialty Metal Fasteners | Tagged Acid, Acidic, Acids, Alloy 625, Alloy C276, Corrosion, corrosion resistance, H2SO4, Hastelloy, Hastelloy C276, HCl, Hydrochloric Acid, Inconel, Inconel 625, Oxidizing, Sulfuric Acid | Leave a comment
Posted on August 23, 2017 by dean
Q: I’m working with boiling sulfuric acid and tried Alloy 20 for some of my bolting but am having corrosion. I’m confused as I thought that is what they are best for. Any suggestions. A: You are right Alloy 20 does typically perform very well in sulfuric acid and even … Continue reading →
Posted on July 25, 2017 by dean
Hastelloy alloys have long been the gold standard of corrosion resistant bolts; only out performed by metals like Zirconium and Tantalum. This family of high performance nickel alloys can handle strong acids like hydrochloric, sulfuric, acetic, formic and phosphoric acids, yet each grade actually exhibits its own strengths in dealing with specific acids and niche environments. … Continue reading →
Posted in Blog, Material, Specialty Metal Fasteners, Uncategorized | Tagged Alloy B3, Alloy C2000, Alloy C22, Alloy C276, Boiling Acid, Corrosion, H2SO4, Hastelloy, Hastelloy B3, hastelloy C2000, Hastelloy C22, Hastelloy C276, HCl, Hot Acids, Hydrochloric Acid, nickel alloys, oxidizers, Oxidizing, Sulfuric Acid | Leave a comment
Posted on July 12, 2017 by dean
Q: I was planning on using Hastelloy C276 in hot sulfuric acid. It would be approximately 50% concentration around 100F +/- 10 degrees. Will this be okay? I’m just concerned because I read that it cannot handle strong oxidizing environments and I’ll be using it in an application where its … Continue reading →
Posted on June 1, 2017 by dean
These two alloys are often confused as being almost the same, which is almost true. They are both nickel alloys and share many key characteristics. AL6XN and Alloy 20 are alike in that they each retain their strength to about 1000°F. In addition they both perform well, in salt water environments, … Continue reading →
Posted in Blog | Tagged acid resistance, AL6XN, Alloy 20, Carpenter 20, Corrosion, corrosion resistance, Nickel Alloy, Sulfuric Acid | Leave a comment
Posted on May 25, 2017 by dean
Q: I’m using zirconium fasteners in a sulfuric acid process but they are showing corrosion. I’m not sure why as I’m well below boiling and only using 40% concentration. There may be some downstream contaminants, but not much. Any ideas? A: It is most likely the contaminants that are causing … Continue reading →
Posted in Application, Corrosion Resistance, FAQs, High Temperature Resistance, Material, Specialty Metal Fasteners | Tagged Alloy 625, Alloy C22, Alloy C276, C22, C276, Corrosion, corrosion resistance, Ferric chlorides, H2SO4, Hastelloy, Hastelloy C22, Hastelloy C276, Inconel, Inconel 625, oxidizers, oxidizing media, Sulfuric Acid, tantalum, Zirconium | Leave a comment
Posted on April 13, 2017 by dean
Q: Is there any advantage of using a Hastelloy B3 fastener over a B2 fastener? A: Both Hastelloy B2 and B3 fasteners provide good resistance to non-oxidizing acids, such as hydrochloric acid and sulfuric acid. The only advantages of Hastelloy B3 fasteners over B2, is that they offer enhanced thermal stability … Continue reading →
Posted on November 11, 2015 by dean
Sulfuric Acid (H2SO4) is one of the most widely used and industrially important acids in modern society, being an essential component in the production of polymers, fuels, pharmaceuticals, electronics, and mining. While sulfuric acid is commonly used, enabling fasteners to survive in this environment is not always an easy task. To help you tackle this feat, … Continue reading →