×
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

can stainless steel ss316 withstand corrosion?

can stainless steel ss316 withstand corrosion?

can stainless steel ss316 withstand corrosion?

(OP)
we have a stainless steel, vertical, cylindrical, tank made out from ss316 plates with a thickness of 5mm, including a corrosion allowance of 3mm. the capacity of the tank is 25 cubic meters and contains H2SO4, with the applicable code as API 650, with design pressure as atmospheric and design temperature at 50degC. all nozzle connections are ss316. this tank has exhibited corrosion, as reported by our quality control. what would be the best material for this kind of fluid, h2so4?

RE: can stainless steel ss316 withstand corrosion?

etrobal

The corrosion of stainless steel in contact with sulfuric acid is a function of the concentration of the acid ,the operating temperature aand if the acid is aerated or not. The approach used in you case, stainless steel + corrosion allowance, seems very strange to me. corosion allowance is never, at least in my experience, used with stainless steel, if you select SS is 'cause you think that SS will not have corrosion. what you've to do is to select a material that resist in your oprtaing conditions.

http://www.corrosionist.com/Questions_Answers_5_stainless_steel_316_sulfuric_acid.htm

there are also NACE standard on this issue :

Design, Fabrication, and Inspection of Storage Tank Systems for Concentrated Fresh and Process Sulfuric Acid and Oleum
at Ambient Temperatures
NACE SP 0294-2006

hope this help

S

Corrosion Prevention & Corrosion Control
 

RE: can stainless steel ss316 withstand corrosion?

there are entire books on the handling and storage of sulfuric.
One of the best is the MS series from MTI in St. Louis
http://www.mtiproducts.org/ms2ndedsuac.html

At $300 it is cheap for the info it contains.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: can stainless steel ss316 withstand corrosion?

(OP)
sirs, thank you indeed for the valuable information.

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