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nandan
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Join Date: Jan 2007
Posts: 34

Extruder MOC to resist 3% Sulphuric acid at 160 degrees Centigtrade

08/17/2007 6:42 AM

I wish to extrude cellulose having mixed with 2% Sulphuric acid at 160 degrees centigrades. I want Material of construction wihich will withstand corrosin as well as enough hard to withstand shear force during extrusion.
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Pathfinder Tags: Corrosion extruder Hardness Sulphuric acid
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Anonymous Poster
#1

Re: Extruder MOC to resist 3% Sulphuric acid at 160 degrees Centigtrade

08/17/2007 7:12 AM

http://www.coleparmer.com/techinfo/chemcomp.asp
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#2

Re: Extruder MOC to resist 3% Sulphuric acid at 160 degrees Centigtrade

08/17/2007 7:33 AM

Keep some pressure applied to the extruded materials. About 5.3bar is needed to keep the mixture from flashing to steam after the extrusion point, which would be hazardous to anyone in the vicinity otherwise.

http://www.simetric.co.uk/si_steam.htm is a handy website in any Engineer's 'favourites'.

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MUKULMAHANT
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#3

Re: Extruder MOC to resist 3% Sulphuric acid at 160 degrees Centigtrade

08/18/2007 1:01 AM

Carburize,Nitride, or Hardchrome the Extruder Barrel ID and screw OD-if you want continuous duty+ long life!

If you extrude only a few Hours/day - do not worry-wash after shift and blow hot air through.

This one<withstand shear force during extrusion> has to be as the designer fixed!.

If you are worried of abrasion, then <Carburize,Nitride, or Hardchrome> will be best.
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