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7597099 
Journal Article 
Carbamates can cause corrosion problems 
Dillon, CP 
1999 
0 
Materials Performance
ISSN: 0094-1492 
NACE 
Houston, TX, United States 
38 
12 
74-75 
English 
It is generally understood that the production of urea involves serious corrosion problems. The corrosive species in this reaction, in which the starting reagents are two moles anhydrous ammonia to one mole carbon dioxide, is not urea itself. It is the intermediate ammonium carbamate. The carbamate loses water to form urea. It should be noted that carbamic acid cannot exist itself, presumably decomposing into NH3 and CO2. 
Ammonia; Ammonium compounds; Carbon dioxide; Carboxylic acids; Urea; Ammonium carbamate; Corrosion 
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