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Discussion Forums - The Hendrix Group
HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...Excessive Sulphuric acid corrosionExcessive Sulphuric acid corrosion
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1/3/2006 9:00 AM
 
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I want to find a suitable MOC for use with sulphuric acid. The pipe is used for diluting 100%concentrated sulphuric acid to 98.5% purity. The temperature reaches around 98 degree celcius. The pipe remains dipped in acid and water flows at a rate of 2000 kg/hr. The concentration around pipe is around 80%. We have tried using Cast iron, SS316, HDPE, Polypick but all of these get corroded with in 2-7 days. Telon has so far shown the best resistance but it also lasts for about 2 months at maximum when wall thickness of dilution pipe is 10 mm. Please do guide & help me in finding a suitable MOC which can last atleast for 6 months. Help is awaited.
 
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1/4/2006 9:00 AM
 
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At 98-100C and at 80% conc. around the Pipe neither CS nor SS 316 will will be suitable. Cast Iron is OK but it can not resist tubulent flow and temperature fluctuations. HDPE may not have 100C temperature resistance. I may suggest to use Cast Alloy 625 ( N 06625 ) or Cast Alloy C 276 ( N 10276) in order of preference . But at 98C the performance has to be proofed first under a simulator. Otherwise you may apply a surface Lining with VITON which is resistance to <=98% conc. and upto 180C. If you have any other informations please share with the forum. regards DM Mobile - 94342 36119
 
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7/25/2007 9:00 AM
 
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Our calorised pipes will only work and work and work
 
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