What is the form of corrosion of metals by urea-ammonium solutions?

2010-04-11View Original

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What is the form of corrosion of metals by urea-ammonium solutions?

Reply #22010-07-24

The corrosion of metals by urea-ammonium solutions is mainly due to the carbamate ions in the solution, as well as the cyanate ions formed through the isomerization of urea; these are reducing anions that can destroy the passivation layer on the surface of stainless steel, thereby causing active corrosion.

Reply #32010-07-27

1. Uniform corrosion； 2. Intergranular corrosion ； 3. Selective corrosion ； 4. Stress corrosion ； 5. Pinhole corrosion ； 6. Condensation corrosion ； 7. Crevice corrosion ； 8. Erosive corrosion.

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