CORROSION ADDITIONS in CO2 pipelines! 2

[uzellac]

Please is there somebody who can help me about

What kind of additions do we use for corrosion in pipes in which flow CO2 high preassure!

THANKS THANKS THANKS !

 

[blacksmith37]

Is there any moisture/ what is the dew point ?

 

[gr2vessels]

uzellac,
If there is no moisture (water), there is no corrosion. If there is only gas/vapour and no condensation, there is no corrosion. You have to reply with more details of the fluid, if you need answers.
Cheers,
gr2vessels

 

[uzellac]

HELLO ....DEAR PEOPLE
THANK YOU,THANK YOU AND THANK YOU ON FAST ATION!

in my gas mixture i have

sum gas kondezat wather
CH4 mol % 8,01 8,52 6,27 0,00
C2H6 mol % 1,13 1,17 1,19 0,00
C3H8 mol % 1,09 1,11 1,37 0,00
C4H10 mol % 0,79 0,80 1,17 0,00
C5H12 mol % 0,51 0,50 0,94 0,00
C6H14 mol % 0,78 0,71 2,10 0,00
C7H16 mol % 0,60 0,53 1,86 0,00
C8H18 mol % 0,48 0,40 1,79 0,00
C9H20 mol % 0,35 0,28 1,40 0,00
C10H22 mol % 0,35 0,27 1,60 0,00
C11H24 mol % 1,49 0,70 11,96 0,00
CO2 mol % 76,88 81,24 66,51 0,13
N2 mol % 2,99 3,24 1,61 0,00
H2O mol % 4,55 0,53 0,23 99,87
H2S ppm weight. 32 30 22 57

-THE PREASURE IN PIPELINE IS 140bar,
temperature 47 celsiouse (320,15K)
-FLOW RATE IS 4680 kg/houre
-THE LENGTH OF A PIPELINE IS 2800meters.

****WHIT THIS VOLUES I NEED TO FIND THE ANTICORROSE ADDITIONS FOR
I N S I D E OF PIPELINE WHERE CO2 IS FLOW!

 

[stanweld]

You have water + CO2. At the point where condensation occurs, you will have pitting corrosion. You may wish to use a corrosion inhibitor.

 

[uzellac]

Hello Stanwel one more time and one more time thanks!

Well i know THE PROBLEM WHIT H2O and that i need a corrosion inhibitor
BUT MY PROBLEM IS EXACTLY THAT ....

*I DON T KNOW WHAT KIND OF additions (INHIBITOR) i need for that!?

IF YOU DON T HAVE A IDEA .... IT WOULD BE COOL TO SHARE SOME WEB SITES ABOUT THAT OR WHATEVER YOU CAN!

THANK YOU IN ADVANCE ONE MORE TIME!

 

[brimmer]

Some large corrosion inhibition suppliers you could search, contact and ask for info would be:

Baker Hughes
Champion Technologies
Nalco

 

[stanweld]

Google Cortec; email and call them.

 

[cloa]

My personal opinion- he'll find nothing suitable for such extreme conditions. I assume its a gas lift for enhanced recovery or sequestation injection line for fulfulling some environmental requirements. Most lines of that type would be a Corrosion Resistant Alloy probably superduplex stainless steel.

 

[uzellac]

We have a carbon still pipeline already!
I forgat to say that!

I DON T KNOW WHAT KIND OF additions (INHIBITOR) i need to use inside of pipe!? ....i heard that it is some kind of fluid .....but i did not find anything more!

THANKS PEOPLE!

 

[SJones]

If it is injection, you will not want an inhibitor in the system as it will gunk up the formation. Was the pipeline material selected as carbon steel on the basis that the gas has come off a treatment plant and gone through dehydration by any chance?

Steve Jones
Materials & Corrosion Engineer

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

 

[uzellac]

Ok the all story is something like this!

I have a CO2 which FLOW INSIDE OF CARBON STILL PIPELINE (classic one) from gas boring (drill) and flowing next 2800 meters where we inject in gas boring (drill) because of displacement!

In the gas stream i have 0,53% mol wather andin condensate 0,23% mol.

That is it!

* what kind of hemicals/fluids/liquids/inhibitors or whatever, do we use as a anti-corrosiv means

THANK YOU,FOR WHATEVER INFORMATIONS!

REGARDS!

 

[eagle7b]

Where is the location? Multi-Chem, A Halliburton Service handles these types of applications on a daily basis. We can help you.

 

[uzellac]

THANK YOU PEOPLE AT ALL ..... I FOUND WHAT I NEEDED!

THANKS ONE MORE TIME!

 

[SJones]

So, what did you find then?

Steve Jones
Materials & Corrosion Engineer

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

 

[uzellac]

I found that the internal corrosion inhibitors inside of CO2 pipeline flow are:

-ph-buffering chemicals
-biocides (for mitigation of bacterial corrosion)
-corrosion inhibitors e.g. film forming
-glycol or methanol added at high concentrations for hydrate inhibition,diluting the wather phase
-dispersants for emulsificaations the wather in oil
-scavengers for removal of corrosive constituents at low concentrations.

 

[HenryBiose]

First to solve the problem is by Design.
First since there is the presence of CO2 then calculate the corrosion rate using De warrd and Miller Equation. Then if the corrosion rate is very high you can reduce it by applying the Inhibitor Availability Equation asuming that inhibitor is available within 98 percent - 100 percent. Then the corrosion rate would be reduced. From here the corrosion allowance is calculated by Multipying the corrosion rate with the design life (say 25years).
In the actual, selection of corrosion inhibitor is always vendor dependant inorder to check compactibility with anti-hydrate former(i.e methanol or glycol).
The presence of high water cut also indicates the possibility of corrosion that would generally be resolved with the De warrd amd Miller Equation.