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Mitigating Corrosion Under Insulation and Supporting the Longevity of Industrial Pipe Insulating Systems

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Ammonia Corrosion

Last updated: July 19, 2024

What Does Ammonia Corrosion Mean?

Ammonia corrosion is a corrosive attack on a material that is caused by the interactions between it and ammonia. Ammonia corrosion occurs when liquid ammonia that contains impurities or contaminants is brought into contact with mild steel. Ammonia is also corrosive to other materials even when the ammonia does not contain impurities.

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Corrosionpedia Explains Ammonia Corrosion

Ammonia corrosion can cause stress corrosion cracking in steels. This occurs when contaminants in the ammonia are brought into contact with the steel, a situation that commonly occurs with pressure vessels. Care must be taken to ensure that pressure vessels are not subjected to this type of corrosion. Water can be added to the ammonia to help prevent stress corrosion cracking.

Ammonia that is mixed with water is not corrosive to iron or steel. It is, however, corrosive to many other metals. Zinc, copper and brass are some materials that should not be brought into contact with ammonia that contains water because ammonia corrosion can occur.

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