×
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

HISC and SSC

HISC and SSC

HISC and SSC

(OP)
During subsea pipeline design I have come across hydrogen induced stress cracking and sulphide stress cracking. i think i understand what these are, however I am unsure of the difference between them. Is SSC not caused by the hydrogen in H2S, and therefore a result of hydrogen as well? I have read that HISC affects duplex materials and can make them more susceptible when cathodic protection is applied. Is this the only difference? Thanks

RE: HISC and SSC

Try sticking to a recognised vocabulary document which will help communication and understanding.  From your question, the NACE Glossary Of Corrosion Terms would have the description 'hydrogen induced stress cracking' as "hydrogen embrittlement" or "hydrogen stress cracking" which is what it is.  SSC is sulphide stress cracking and requires a corrosion process to be occurring that involves hydrogen sulphide.  Clearly, when cathodic protection is applied, a corrosion (wastage) process will not be occurring.

Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdoweb/

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