Corrosion of mild steel exposed to inhibited urea--ammonium nitrate solution at ambient temperature under static conditions
- National Fertilizer and Environmental Research Center, Muscle Shoals, AL (United States)
- Nutra-Flo Co., Sioux City, IA (United States)
A series of corrosion tests was performed with mild steel exposed to 32-0-0 UAN solution at ambient temperature, under static conditions, and at pHs of 6.8 to 7.2 to evaluate the effectiveness of several new corrosion inhibitors. Results of the tests revealed that the pH of 32-0-0 UAN in the neutral range does not significantly affect the corrosion rate of mild steel after prolonged exposure. The corrosion rate of mild steel was 60 to 70 mpy. Results of tests with inhibitors showed that 100 ppm of Surtech 143 from Surface Chemists of Florida, Inc., provided excellent corrosion resistance (approximately 1 mpy after long-term exposure). With a 5-minute surface treatment, Rust Resistor from Nutra-Flo Co., provided excellent corrosion resistance (corrosion rates less than 1 mpy). Corblok at 100 ppM provided excellent corrosion resistance up to 14 days (corrosion rate of approximately 2 mpy); the corrosion rate increased slightly when exposed for 28 days. Surtech 145 and Surtech 433 provided only limited protection.
- Research Organization:
- National Fertilizer and Environmental Research Center, Muscle Shoals, AL (United States)
- Sponsoring Organization:
- TVA; Tennessee Valley Authority, Knoxville, TN (United States)
- OSTI ID:
- 6859079
- Report Number(s):
- TVA-Bull-Z-299; CONF-910812-19; ON: DE93002455
- Resource Relation:
- Conference: 202. national meeting of the American Chemical Society (ACS), New York, NY (United States), 25-30 Aug 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
60 APPLIED LIFE SCIENCES
AMMONIUM NITRATES
CORROSIVE EFFECTS
CORROSION INHIBITORS
TESTING
STEELS
CORROSION
UREA
AQUEOUS SOLUTIONS
TEMPERATURE RANGE 0273-0400 K
ALLOYS
AMIDES
AMMONIUM COMPOUNDS
CARBONIC ACID DERIVATIVES
CHEMICAL REACTIONS
DISPERSIONS
IRON ALLOYS
IRON BASE ALLOYS
MIXTURES
NITRATES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
SOLUTIONS
TEMPERATURE RANGE
360105* - Metals & Alloys- Corrosion & Erosion
553000 - Agriculture & Food Technology