3 replies to this topic

[awesome]

I am looking for practical knowledge from the experts on this topic. Co2 present in the fluid content
will cause corrosion, but to what extent depends on its percentage. Say I have 2%-3% of co2 in natural gas composition,
does one needs to do a detailed analysis to say it will cause corrosion?

[Art Montemayor]

Awesome:

Contrary to what you state, CO₂ DOES NOT CAUSE ANY CORROSION. I have piped and transported CO₂ using carbon steel equipment as well as copper and brass pipe and never experienced (or heard of) any corrosion taking place. Where have you seen or heard of any CO2 corrosion - and under what conditions?

Now, CO₂ in the prescence of liquid water will cause corrosion - mainly because it is no longer pure CO₂, but rather "carbonic acid". Is that what you mean to write about? However, you don't mention water in your gas mixture, you only say natural gas + CO₂. If the mixture is without water, I would not expect any corrosion problem.

[awesome]

Apologies consider water as well as Natural gas from wells is never dry.

[ankur2061]

awesome,

CO2 corrosion in wet natural gas is basically a function of the partial pressure of CO2 in the gas. NORSOK M-506 is a recommended practice for the evaluation of CO2 corrosion.

Additionally refer the link below for some guidelines on CO2 corrosion:

http://www.corrosion...nference-14.pdf

Hope this helps.

Regards,
Ankur.