×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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

Material selection between AISI 316 L / AISI 316 L NACE / Duplex

Material selection between AISI 316 L / AISI 316 L NACE / Duplex

Material selection between AISI 316 L / AISI 316 L NACE / Duplex

(OP)
Hello,

I have the following problem.
I need to select the proper material between AISI 316 L / AISI 316 L NACE / DUPLEX to be suitable for following working condition:

pH = from 2 to 5
Chloride (Cl-) = less than 500 ppm
Sulfates (SO42-) = less than 13700 ppm
Temperature = 25 - 30 °C

In the above stream, I'm dosing following additive:

- Ozone (O3) = dosing rate 280 g/m3 - Injection concentration 8%
- Hydrogen peroxide (H2O2) = dosing rate of pure product (100% H2O2) 75 mg/L - Injection concentration 35%

Could you please help me to understand which is the most suitable material?

Thanks in advance

RE: Material selection between AISI 316 L / AISI 316 L NACE / Duplex

Is this an existing application?
I have seen 316L pit in pH=4 with 10ppm Cl.
IF you are rally going to pH=2 with any real chlorides you need more corrosion resistance.
Either a 6%Mo superaustenitic (AL-6XN) or a superduplex (2507) would withstand it.
Now if your pH is actually 4 or higher then you should be able to use 317LMN or 2205.

The O3 and H2O2 will help, but I wouldn't rely on having the extra oxygen just to keep the material passive.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

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


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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