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Tag: Urea

Problem No. 70: Corrosion at unexpected locations like in dry CO₂  pipelines

It is common knowledge that wet CO₂ is corrosive to carbon steel and “dry” CO₂ is not corrosive to carbon steel. So typically engineers and contractors choose carbon steel for dry CO₂ conditions and stainless steels for wet CO₂ conditions. This can be seen in the CO₂ feed section of almost every older urea plant. But is it true that carbon steel is always the right choice for dry CO₂ and is dry CO₂ really dry under all circumstances?