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Corrosion effect of traceable residue of carbon dioxide in aqua ammonia on the carbon steel piping

I would appreciate if you can give me any comment on the effect of traceable residue of carbon dioxide in aqua ammonia to the carbon steel piping. The concentration of carbon dioxide is about 30 ppm in aqua ammonia.

Best regards,

Ji Ok Kim
- Seoul, Korea

Carbon dioxide will form carbonic acid with water, in a sealed system, I would think that the alkalinity of the ammonia would tend to neutralize this acid. Is there free oxygen in this system?

Tom Pullizzi
Falls Township, Pennsylvania

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