Corrosion Rates for oil process?? 1

[lucianonar]

Hi

I´m on a project where there is not too much information about the fluids proceced, and I need to propose a first estimation of corrosion rates. Do you know any book o bibliography where can I get standar corrosion rates for difrent systems on the oil production??
My first try was to use API 581, but the most conservative rate are too high.

I´ll apreciate any help
Luciano

 

[rustbuster]

Corrosion is very complex depending on the chemistry, water, chlories, acid gases etc. 5 to 10 mpy is very realistic and can be used to determine corrosion allowances etc.

Without the fluids information it is very hard to even select materials. I would be asking questions.

NACE has some excellent reference materials and recommended practices, you should look in that direction

 

[lucianonar]

thanl you rustbuster

I know that what i´m asking for is diffucult to find, that´s why i can´t find it!! I look up in NACE and I found that they have a corrosion rate survey for a lot of metals with different fluids. That could help, but it´s an expensive solution...

Cheers

 

[SJones]

If you do find a book or bibliography of standard corrosion rates then please let us know so that I can retire. Up until such time, you have two options:

1. Wait until the process data is more refined

or

2. Run your corrosion model over a wide range of variables and then wait

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04

 

[lucianonar]

This is what I found at NACE. I really didn´t see it so I´m not sure if it is what I´m looking for.

http://events.nace.org/Publications/Corsur.asp#using

Don´t worry, if I confirm this I wont give it to you so you can steel keep working. je

regards
Luciano

 

[ErnieWise]

Hi Luciano

I think that even if you do find some "standard" data it's probably going to be wildly inaccurate anyway because every project is different.

Are there no tests that you can do to collate your own data for your project? I think that would probably be a more effective start than looking for standard data.

Alex Wise
Corrosion Service Company Europe Ltd

http://www.corrosionservice.co.uk

 

[lucianonar]

Hello Ernie

I understand what you are saying, and be sure that one of my recomendation is going to be to start using corrosion cupons. The objetive now is to have a first corrosion rate to stablish a base line. When I found that nace survey lynk, I thought that meaybe I could found similar information.

Cheers
Luciano

 

[strider6]

it depends on what you mean with "not too much information about the fluids proceced".
sometimes is possible to make some assumptions on the materials with just few informations on process fluid..
i suggest u to ask a corrosion engineer to have a look at the data that you have..


S

Corrosion & Rust Prevention Control

 

[SJones]

lucianonar - what corrosion model are you using? You can create your own operating envelopes and compute the resulting corrosion rates. So you can say to whoever is asking you for corrosion rates "if we have this much CO2 and this much water and this flow rate we will get this mm/year corrosion on carbon steel." Then you can sit back, having done your job, and wait for the process engineers to work out where the fluid will sit in the envelope that you have created.

If you want to try and look it up for a hydrocarbon production system in tables, I wish you all the luck! Alternatively, just tell your boss "until you give me decent fluid data, you will be building the facility all in Inconel 625!"

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04

 

[lucianonar]

Hello Steve

What to recomend above is what i´m doing now. I´m using the API 581 2008 model to define the difrent variables we will need to collect to define a corrosion rate.

Regards
Luciano

 

[SJones]

So, you should have found NORSOK M-506 by now. Assuming that you are dealing with an upstream environment and not a refinerey process, keep running the NORSOK M-506 model with changing parameters. This will highlight which parameters are giving the biggest effects on corrosion rate. This will then tell the process engineers where to focus in getting better data to you. If you have seen all the variables that you are dealing with, you cannot seriously expect there to be 'standard tables' of corrosion rates.

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04

 

[TomEun]

Normally you can find the answers from the following resources below.

1. Corrosion Data Survey or Corrosion Resistance Tables – Books or Standards by Specialists and/or Societies.
You can find them in NACE/ API/ MTI/ NiDI/ TWI/ or other websites.

2. Chemical (or Corrosion) Resistance Tables/ Corrosion Guide/ Corrosion Database/ Corrosion Data Survey prepared by companies (Metal/Non-Metal suppliers)
You can find them in Internets. But many tables are come from other company data without sufficient proving. Also, the data are normally too much simplified by only 2-3 input data.

3. Corrosion Resistance Calculation Programs prepared by Special Companies or Corrosion Societies.
You can find them in NACE or other commercial websites. But some programs have a limited output and input mode.

4. Articles for Specific Corrosion Issues in Several Technical Societies.
e.g., API (Standard, RP, Spec, Bulletin, Publications, Reports, etc.), NACE (MR, RP/SP, TM, Publications, Reports, Corrosion, Materials Performance, Conference Papers, etc.), ASM Metal Handbooks, WRC, ASTM, ASME, EFC, DNV, MTI, NiDI, TWI, Materials Sciences, Chemical Eng., Petroleum Eng., Power Plants, Oil & Gas Industry, Offshore, etc.


The most importance to obtain the best answer is to collect many input data. Also, please do not use only a single resource because the corrosion data may be come from a certain/limited environment. At least two or three data should be used for your solution. Also, you have to find the synergy/accelerate factors and mitigation factors for corrosion.

Hope this helps,

Thomas Eun/ Materials and Corrosion Specialist

 

[lucianonar]

thank you Tom. I will chek articles in those places.
Regards

Luciano