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!

*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.

Jobs

Loss of coblat from stellite components

Loss of coblat from stellite components

(OP)
Thanks
I'm trying to track down the source of elemental cobalt in power plant feedwater.  The water is super clean (0.2 usiemens), low O2, 250-350F,and sub ppm So4, Cl, Cu and Na ~ 1 ppm Fe. Water is sent to a nuclear reactor where the Co containing sludge is activated by neutrons causing secondary ( and problematic) radiation.
Many of the valves and bearing surfaces contain stellite/cobalt and there is no measureable loss of material (from cavitation or wear).  Is it possible that there might be uniform loss of material from some local galvanic cell or electroplating effect, causing caobalt to plate out on iron (piping, pump internals, etc) surfaces.
Does anyone have experience with loss of materials (Co) in this environment from anodic attack ?  

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


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close