×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Zero Corrosion for Sulfuric Acid?

Zero Corrosion for Sulfuric Acid?

Zero Corrosion for Sulfuric Acid?

(OP)
I need advice on selecting a material that will not experience corrosion from sulfuric acid. All concentrations with working temperatures of -100 to 200 degrees F will be experienced. If velocity of the fluid is an issue, assume 300 mm/s.
Thanks!

RE: Zero Corrosion for Sulfuric Acid?

Please perform a search on this site before posting a thread.  This topic has been covered before.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

RE: Zero Corrosion for Sulfuric Acid?

(OP)
I guess I should have mentioned that I had already done this.  Could you please direct me to the thread?  I conducted a search in the corrosion forum for 'sulfuric acid corrosion' before I posted and was unable to find a solution.  There were somewhere in the neighborhood of 90 post so it is possible I overlooked it.

I am aware that some glasses may do the job, but I wanted some clarification from people who have some experience with corrosion engineering.  I would prefer a metal if it is an option at all.

Thanks

RE: Zero Corrosion for Sulfuric Acid?

Your material selections will be few for handling all concentrations of Sulfuric Acid at this temperature range;

Tantalum
14.5% Si-Fe

The web site below is for the Nickel Development Institute.
http://www.nickelinstitute.org/index.cfm/ci_id/6511/la_id/1.htm


After you enter the site, locate the Technical Series article No 10057. This article provides a comprehensive explanation of stainless steel and ni-bearing alloys for sulphuric acid service, the paper is titled;
"Selection and performance of stainless steels and other ni-bearing alloys in sulphuric acid".

RE: Zero Corrosion for Sulfuric Acid?

Unless there's a compelling reason to use metallic materials in this service, don't.  Use a polymer.  Use polymer-lined equipment if you need strength beyond what the polymer can provide on its own.  Depending on the rest of the conditions which you do not list, any number of polymers will do admirably.

RE: Zero Corrosion for Sulfuric Acid?

(OP)
Excellent information everyone.  Thank you.

This application requires a flexural mechanism, and this was my primary motivation for examining metals.  However, the difficulties of using metals in this case may certainly justify a different approach.  The pressure in this application is less than 50 psi, so I am sure that polymers will work well.

Where might I find resources on selection of a polymer.  Perhaps more important, I will need to find information on seals.

RE: Zero Corrosion for Sulfuric Acid?

Two very good sites on sulfuric acid properties and suitable materials of construction [note: some metals resist 98% sulfuric but not medium concentrations]:

Resistoflex (make plastic lined pipe & fittings):
"Handling Sulfuric Acid" page (note the links on LHS):
http://www.resistoflex.com/sulfuric.htm

Sulphuric Acid on the WebTM &
Technology Manual, websites mostly for sulfuric acid producers:
http://www.sulphuric-acid.com/techmanual/introduction.htm

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources