×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• 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.

# corrosion rate calculation

## corrosion rate calculation

(OP)
Good day all,
Can anyone give some insight into determining the corrosion rate of a carbon steel pipe? I have minimum thickness readings, nominal thickness, corrosion allowance, piping class, and will like to get the rate of degradation of the pipe.

Thanks.

### RE: corrosion rate calculation

mecha...

It has been my expereince that corrosion rates for carbon steel piping are not really calculated.....they are estimated based on lab test results.

Lets say that in a certain service the corrosion rate from experimental data is 2 mills per year (.002 inches) if we want about a thirty year piping life, we would specify an additional "corrosion allowance" of .0625 inches on the pipe wall thickness.

Corrosion allowances used in piping design typically range from 0.0 to 0.125 inches in most service.

If the corrosion rate causes a piping lifetime that is too short, switch to a more corrosion resistant material.

-My opinions only

-MJC

### RE: corrosion rate calculation

Mecha20...corrosion rates are very specific to the use and environment of materials.  As MJCronin noted, they are usually estimated from lab or field data.

Look at past performance of the material in similar applications and environment.

### RE: corrosion rate calculation

Mecha20 Subtract your minimum thickness reading from the nominal thickness then divide by the amount of time in service. Will give you a general corrosion rate.

Mike

#### 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.

#### 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
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™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:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!