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


Fuel reactions

Fuel reactions

Fuel reactions

Hi dear reader,

I'm a marine engineer and I have a question about my fuel. Our fuel is following the ISO 8217:2010 standard, which speaks of maximum allowance of fuel contamination. Onboard my vessel we're using HFO.

The iso standard says I'm allowed to have up to 300 ppm of Vanadium in my HFO fuel. Now lets take for this example that the standard consumption of fuel is a constant of 100 m³ per week. If I have fuel of 100 ppm does that mean that the damage caused to my engine take 3 times as long as it would for fuel with 300 ppm of Vanadium?

The expected reaction is high temperature corrosion, especially considering that the exhaust line has temperature of 600°C. Take into account that this is a marine engine so high sodium values in the air can be expected. Now I quote: "sodium vanadyl vanadate 5Na2 O. V2O5 . 11 V2 O5 melts at 545 °C. Liquid deposits formed in this way flux the protective oxide layers on structural alloys, making them vulnerable to rapid corrosion." (ref. http://www.swcc.gov.sa/files%5Cassets%5CResearch%5...)

A lot of damage can be expected at my piston crown, turbo charger, exhaust seats & valves and exhaust pipelines, therefor this information is interesting to me. Anybody that knows and can explain the answer to my question? Thanks in advance!

RE: Fuel reactions

Quote (Irenicus)

If I have fuel of 100 ppm does that mean that the damage caused to my engine take 3 times as long as it would for fuel with 300 ppm of Vanadium?

Short answer, no. The mechanism isn't one unit of vanadium 'takes out' one unit of metal, so the effect will be non-linear.


RE: Fuel reactions

Corrosion will not be directly proportional to the concentration of Vanadium. Corrosion may increase with higher concentrations of Vanadium, but there is no method available that will accurately predict the corrosion reaction. There are many factors that contribute to corrosion, like engine speed, temperature, environment, etc.

RE: Fuel reactions

Temperature is the most important factor for the rate of attack.
What will happen with V is that you will have no attack at some low level.
The at a medium level you will start to see long term degradation.
Then there will be a breakaway point where you will get catastrophic attack.
The 300ppm was set trying to keep you out of the last region.
I would expect this much to show some long term degradation though.
I would think that the engine manufacturers have published lots of research on this subject. After all they use special metallurgy for many parts selected just to fight this issue.

= = = = = = = = = = = = = = = = = = = =
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


eBook - Rethink Your PLM
A lot has changed since the 90s. You don't surf the Web using dial-up anymore, so why are you still using a legacy PLM solution that's blocking your ability to innovate? To develop and launch products today, you need a flexible, cloud-based PLM, not a solution that's stuck in the past. Download Now
White Paper - Using Virtualization for IVI and AUTOSAR Consolidation on an ECU
Current approaches used to tackle the complexities of a vehicle’s electrical and electronics (E/E) architecture are both cost prohibitive and lacking in performance. Utilizing virtualization in automotive software architecture provides a better approach. This can be achieved by encapsulating different heterogeneous automotive platforms inside virtual machines running on the same hardware. 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