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Discussion Forums - The Hendrix Group
HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...Corrosion Rates in Sulfuric AcidCorrosion Rates in Sulfuric Acid
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1/12/2005 9:00 AM
 
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I am trying to determine the minimum wall thickness we will require for a fitting off of a 93% sulfuric acid metering pump. Is there anywhere I can find a "typical corrosion rate" for 316LSS for this service?? Thanks
 
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1/17/2005 9:00 AM
 
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M. Concentrated sulfuric acid will corrode materials more rapidly with higher fluid velocity. There have been many cases where a storage tank gives perfectly acceptable service life, yet the attached nozzles show erosion/corrosion failures (hydrogen grooving) Try this link: http://www.eng-tips.com/viewthread.cfm?qid=103747 The temperature of the acid is also important..... The premium alloy material for H2SO4 in higher velocity service is, of course, Carpenter's "Alloy 20" (UNS N08020). The 316 SS corrosion rates in sulfuric acid service are commonly compared to Alloy 20 in the sales literature.... http://www.hpalloy.com/DataSheets/20.htm If you "GOOGLE" corrosion rates with acid and sulfuric.....then you will find what you are looking for My opinion only... MJC
 
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1/18/2005 9:00 AM
 
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I found a chart that will be of help to you... http://www2.sandvik.com/sandvik/0140/internet/se01598.nsf/cdatas/3356D47E0D5CCD6541256627002B8DA4 It is used by the Sanvik people to display the corrosion resistance of thier "SandvikSAF 2304 " pipe and tube material. According to my read of the chart, at 40C, 93% H2SO4 is1 mill/year for 316 SS MJC
 
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