CO2 corrosion

[davidmoul]

Hi guys,

I'm trying to find compatibility information for our material respect to CO2 corrosion.

If there is a complete litterature on carbon steel, there is not much on polymers.

We are dealing with coils, impregnation system and so on...

Do you have any references on this compatibility? Is it a false problem?

Any help would be very great...

 

[zdas04]

CO2 Corrosion cannot happen in the absence of liquid water. If you have a dehydrated system or a rigerous pigging program then you won't have CO2 corrosion. I see a lot of people going to exotic materials (there is a lot of 1500 psi rated fiberglass piping in the area where I live because everyone was terrified of the pipe just melting away from CO2) when they could have more effectively run CS and implemented a comprehensive pigging schedule.

As to what materials can work with CO2, the answer is "most materials". I get really nervous with the higher grades of SS (installed because of the fear of CO2 corrosion) in high chloride applications. The risk of SCC is much higher than the risk being "mitigated".

David

 

[davidmoul]

thank you for your answer...

The fact is that our spec indicate that the treated gaz will be pure CO2 without any water (less than 1ppm). No ris of CO2 corrosion during the process...

However, what we know really wel is that the spec is never representing reality, especially in the oil and gaz industry... So we want to know what happens in case of the presence of water (during test, opening of the machine and so on...).

I'm looking especially for data about the polymer compatibility.

Your right for the high chloride application and the risk. However, this will not be the case in this application of CO2 treatment.

 

[SJones]

See if you can get to have a look at ISO 23936-1. I haven't yet so can't vouch for it; but, it may be a useful start.

Steve Jones
Materials & Corrosion Engineer

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

 

[davidmoul]

Thank you,

I will order this norm. In fact having a look on the internet on this norm, it seems to be exactly what I need (used by some of our customers).

Once again, many thanks for this really helpful information.

David