Ammonium salts may be generated during the nitric acid production process; could these ammonium salts cause corrosion to 321 material?

2019-03-11View Original

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A heat exchange unit in the company’s high-pressure nitric acid production plant showed signs of pitting corrosion. After analysis, the only possible cause for this phenomenon was ammonium salts. So, can ammonium salts cause corrosion on 321 material? The medium in the equipment’s tube side is nitric oxide gas, while the shell side contains hot water. During the production process, ammonium salt levels in the platinum mesh exceeded the allowed limits. Production analysis suggests that ammonium salts may have entered the equipment in the subsequent stages of the process. As for whether ammonium salts cause corrosion of 321 material, it is unknown; I am reaching out to seek help from fellow users

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Ammonium salts may be generated during the nitric acid production process; could these ammonium salts cause corrosion to 321 material?

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