×
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.

Students Click Here

Hastelloy C 276

thread338-70427

Hastelloy C 276

Hastelloy C 276

(OP)
We have built a quencher in Hastelloy C276. The purpose is to saturate a gas (air + HCl 1000 mg/Nm3 @ 200°C) with a 4% aqueous HCl solution. The gas outlet is at 85°C.

After 8 monthes running we watch corrosion on hastelloy C 276.
Has anybody an explanation ?
Thank you
Replies continue below

Recommended for you

RE: Hastelloy C 276

If you have any oxidizing conditions you will have corrosion of C-276. You can get an oxidizing condition with your setup. I was involved with a similiar problem. Idle or slow flow conditions can get you in trouble due to the formation of 27° baume HCl as a condensation product, which if saturated with Oxygen can be oxidizing.

RE: Hastelloy C 276

don't beilive c276 is suited for weak acid at 200 oC

you might try an alternate technology based on direct quenching

RE: Hastelloy C 276

(OP)
Thak you, Unclesyd and Hacksaw for your answer.
Hacksaw what do you mean by direct quenching ?
Best regards
JPPMJ

RE: Hastelloy C 276

common to use direct sprays to quench gases(licensed technology and several designs are available). this results in the greatest cooling rate (or can) and is used to advantage where the metal temperatures must be kept low.

RE: Hastelloy C 276

What type of corrosion "pitting" ?if not; please elborate else refer to unclesyd post.  What coatings, were considered if any.

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! Already a Member? Login


News
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