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Sulfuric Acid Corrosion Tables |
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> Home > Technology > Corrosion Performance > Sulfuric Acid Tables |
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Corrosion Solutions for Sulfuric Acid Service
Tantalum is superior for handling sulfuric acid at elevated temperatures. A large heater services have been installed in plants for the re-concentration of diluted sulphuric acid arising from metal pickling, oil refinery operations and from petrochemical processes producing alcohols and ketones.
Tantaline offers a large standardized product range including valves, thermowells, fittings and fasteners for sulfuric acid service. Tantaline JobShop may further be used for customer specific design for heat exchangers, heaters, coolers, reactors and pump parts for sulfuric acid applications.
Best Performance/ Price Ratio Available in Diluted Sulphuric Acid
Tantaline offers a chemical performance equal to tantalum at prices similar to nickel alloys having an absolutely unique performance/cost ratio compared to other solutions in titanium, nickel alloys, zirconium and tantalum. The table below shows the relative corrosion resistance in sulphuric acid at various concentrations and temperatures. As can be seen, Tantaline has superior performance over niobium, zirconium and nickel based alloys at a lower relative price.
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Table: Corrosion Performance and Relative Cost of Materials in Sulfuric Acid at Concentrations from 10 to 90% and Temperatures of 50, 100 and 150C
Tantaline is the cost-of-ownership leading solution for:
• Sulfuric acids in concentrations up to 90% at temperatures below 150C.
• In sulfuric acid below 50% concentration and temperatures up to temperatures of at least 250C.
Limitations
Only a few limitations in sulfuric acid service exist for Tantaline:
• Concentrations higher than 96%, where free SO3 in the acid may attack tantalum, leading to rapid corrosion of the surface.
• Concentrations higher than 60% AND temperatures exceeding 170C: Under these conditions, a Tantaline solution will show limited life time, and solid tantalum should be considered.
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| Audio Presentation available: "The Corrosion Performance of Special Metals" |
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