netneut -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing has been free for 22 years,
but without net neutrality we could soon
cease to exist. Do us a solid, click on
the banner, and contact congress today!
topic 12244

Effect of iron in sulfuric acid CS piping


We use 985 sulfuric acid for DAP production. The iron contents recommended by designer are less than 100 ppm. My question is what effect Fe contents have on piping corrosion.

Best regards,

Bashir Muhammad
fertilizer co. - KARACHI, PAKISTAN


Hi Bashir,

I haven't the slightest clue what 985 Sulphuric means nor what DAP production is. Curiosity killed the cat, etcetera.

Sulphuric, I thought, is expressed in percentage terms except when you get to oleum.

Mild steel or iron might well be very suitable for commercial 93 percent but beware if you can occlude any air but if there is an excess of air in the piping ... then the acid becmes diluted and will fail miserably. Sulphuric is NOT suitable for all the lower concentrations..

You didn't give temperature, pressure or pipe size. Useful parameters if you want good advice. But consider ordinary PVC for r.t. sulphuric and ANY lower concentration. But if it is around 93%, any cemented joints must be backwelded properly.... then your worries about Fe content would be eliminated.

Food for thought, anyhow.

freeman newton portrait
Freeman Newton
White Rock, British Columbia, Canada

(It is our sad duty to
advise that Freeman passed away
April 21, 2012. R.I.P. old friend).

a few years (40 odd) in thermoplastics for the chemical industry

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView This Week's HOT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2017     -    Privacy Policy
How Google uses data when you visit this site.