If a very aggressive acid is carried over from a corrosion resistant part of a system into a downstream vessel that is made of carbon steel, the result would be

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The aggressive acid can react with the carbon in the carbon steel to form a corrosion product. This can result in rapid localized corrosion and eventually lead to failure of the vessel in a few hours or days. Therefore, it is important to ensure that materials of construction are compatible with the process fluid to avoid such catastrophic failures.

If a Very Aggressive Acid Is Carried Over from a Corrosion