×
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

Material Selection for Sulfuric acid
2

Material Selection for Sulfuric acid

Material Selection for Sulfuric acid

(OP)
Hi there,
a pump vendor proposing cast iron pump for sulfuric acid. (%98 at 40 deg. C ( 104 F)
gjl-200 = grey cast iron

I could not find any solid literature defending this. Only high-silicon cast irons looks
suitable.
Could I have your input?

RE: Material Selection for Sulfuric acid

Thank you EmmanuelTop.
The search does work.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: Material Selection for Sulfuric acid

(OP)
I know how to use search thanks. I was in some of these discussions.
However each application has different characteristics.
I searched a lot for cold %98 acid but could not find
solid proof - different sources contradict with each other.
Thats why open the thread.

RE: Material Selection for Sulfuric acid

Do you have the MTI MS book on sulfuric?
It is about the most definitive source.
Gray CI is not a very good option. It is susceptible to cracking (oxidation of C flakes).
A ductile iron is a bit better. But they both suffer from velocity related effects.
In a pump you are better off with a high Si CI (14.5% F47003).

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: Material Selection for Sulfuric acid

Often, what materials are selected is not based on the normal operating conditions or chemical components in the service fluid; its the off normal service conditions and contaminants that cause accelerated corrosion; such as lower acid concentration ( higher water content ); what off normal contaminants do you expect ?

RE: Material Selection for Sulfuric acid

(OP)
Thanks for input.
@EdStainless : I dont have this book and I guess it is not sold anymore. I could not also find it on web.
@georgeverghese : IT will be a new line so we have only these data.
Overall, I believe standart iron would be risky considering in such plants it is not easy
to control process and characterisics may change.

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