Follow us on:

2014 Starostin Corrosion inhibition of carbon steel in acqueous solution of ammonium nitrate and urea

The effect of diethanolamine (DEA) and hexamethylenetetramine (HMTA) on the corrosion of carbon steel (CS) in concentrated aqueous solution of ammonium nitrate and urea (ANU) was studied by weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy. Both amines showed high inhibition efficiency >99% above a concentration of 0.5wt% at 25 and 50 degC. The addition of 0.1–0.5wt% sebacic acid to the tested solution containing amines did not enhance the inhibition efficiency. A positive synergistic effect was observed when 0.1–0.5wt% of cinnamic acid was added to the ANU solution containing 0.3–1wt% of amines. These results clearly demonstrate the potential of using CS for storage and transport of ANU solutions under ambient conditions.

 

Share this on:
Twitter
LinkedIn
UreaKnowHow

UreaKnowHow.com is an independent group of nitrogen fertilizer specialists with an impressive number of years experience in designing, maintaining and operating nitrogen fertilizer plants.

Solution Providers offer their solutions to improve our member’s plants performance.