NOTICE

Forums are temporarily disabled while we are working on a new login procedure.

When migrating the old forums over to our new forums we were unable to retain the identity of the authors, so the old posts will show up as "anonymous". All NEW posts will show up credited to their authors. So please participate and share knowledge just as you have in the past.

You must log in if you are an existing user or register if you are a new user in order to contribute to the discussions.

Discussion Forums - The Hendrix Group
HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...Carbon Steel Corrosion based on pHCarbon Steel Corrosion based on pH
Previous
 
Next
New Post
7/29/2003 9:00 AM
 
User is offline 
No Ranking

Joined: 1/1/0001
Posts: 0
I am working on a project in which a process change is being proposed which will lower the pH in a quench tank used to cool aluminum to 5.5 using CO2 injection. The tank is epoxy coated, but the circulation/cooling piping is black iron (carbon steel). I know the corrosion rate will be accelerated due to the acidic environment but I have not been able to find any data to quantify the accelerated rate. The question is will the piping need to be changed out to say CPVC or will the corrosion rate increase only slightly, which result in a reduced service life but not justify the cost of replacement.
 
New Post
7/30/2003 9:00 AM
 
User is offline 
No Ranking

Joined: 1/1/0001
Posts: 0
Hard to say, except that you should expect some increase in corrosion rates. Part of the answer to your question depends on velocities, turbulent flow, etc. You might refer to the original DeWaard-Milliams nomograph for estimated corrosion rates, based on CO2 partial pressures. Hope this helps! David Hendrix The Hendrix Group Inc.
 
 Page 1 of 1
Previous
 
Next
HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...Carbon Steel Corrosion based on pHCarbon Steel Corrosion based on pH


  

News

NEW! Calculation of Ammonium Salt Deposition Temperatures
With a little delay, our Calculation of Ammonium Salt Deposition Temperatures...read more
Sulfidic corrosion calculators NOW AVAILABLE
Our sulfidic corrosion calculators are now available at hghouston.com/calcula...read more

Stay Current

Sign up for our quarterly newsletter

covering updates on corrosion

Sign Up