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...CORROSION OF SGICORROSION OF SGI
Previous
 
Next
New Post
11/13/2002 9:00 AM
 
User is offline 
No Ranking

Joined: 1/1/0001
Posts: 0
Hello, Have anyone experience the corrosion of Spheroidal Graphite Iron with the chemical called PAC ( Poly Alumina Chloride )?Temperature is at ambient condition about 36deg C. Appreciate the help. regards.
 
New Post
11/13/2002 9:00 AM
 
User is offline 
No Ranking

Joined: 1/1/0001
Posts: 0
Dear Rahimi: Thank you for your posts on our corrosion and materials discussion forum. Please consider registering as it provides several useful benefits. Regarding your most recent question, can you supply additional information regarding the chemical properties of the PAC? i.e., its ability to hydrolize, it's resultant pH in water, its effective chloride content, etc. In aqueous media, we would anticipate that the cast irons, including spheroidal cast iron, would be similar to carbon steel. In soils, their corrosion resistance is typically superior to the wrought carbon steels. David Hendrix The Hendrix Group Inc.
 
New Post
11/17/2002 9:00 AM
 
User is offline 
No Ranking

Joined: 1/1/0001
Posts: 0
Actually the corrosion occured on pump's impeller.The pump is pumping raw water and only 1ppm PAC is injected at the suction.Our Water Treatment guy said that this will not cause any effect. ( no reduction in raw water pH ).Checked in ASM H/book that corrosion rate of SGI increases significantly when there is presence of chloride and pH below 7. But not sure if 1 ppm PAC can produce this effect. regards. Rahimi
 
New Post
11/18/2002 9:00 AM
 
User is offline 
No Ranking

Joined: 1/1/0001
Posts: 0
Rahimi: I would not think that 1 ppm PAC would have a significant effect on the corrosion of CI. It sounds like your problem lies somewhere else. David Hendrix The Hendrix Group Inc.
 
 Page 1 of 1
Previous
 
Next
HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...CORROSION OF SGICORROSION OF SGI


  

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