Research on Synthesis and Corrosion Inhibitory Performance of Diisopropylamine Methyl Urea

Abstract:

Diisopropylamine methyl urea (DMU) was synthesized by raw materials of diisopropylamine, paraformaldehyde and urea in acid media, the effect of synthesis conditions including the dosage of hydrochloric acid, the mole ratio of the materials and the reaction temperature on the product yield were studied. A corrosion inhibitor formula that contained DMU, cyclohexylamine, ethanolamine and propiolic alcohol were designed, and static weight-loss method, Tafel polarization curve method were used to evaluate the corrosion inhibitory performance. The results showed that the best synthetic conditions for DMU were the mole ratio of diisopropylamine, paraformaldehyde and urea, 1:1.2:1; reaction temperature, 80°C; the mole ratio of hydrochloric acid and diisopropylamine 1.2:1. The product yield in this condition was 90.23%, the melting point was 230°C. The results of static weight-loss method revealed that DMU, cyclohexylamine, ethanolamine and propiolic alcohol had great synergy effect, the inhibition efficiency of gas phase static weight-loss method reached to 97.61%, and attained 85.20% in liquid phase static weight-loss method. The results of Tafel polarization curve method indicated that the corrosion inhibitor formula contained DMU had a good inhibitory effect to the cathode electrochemical corrosion process of A3 carbon steel.

• Periodical: Applied Mechanics and Materials (Volumes 713-715)
• Pages: 2839-2842
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.713-715.2839
• Online since: January 2015
• Authors: Fu Rong Zhou*, Hu Zhang
• Keywords: Corrosion Inhibitor, DMU, Performance Evaluation, Synthesis

References

[1] Gao Z Y, Liang L L. Liu Z Q. Metallurgical Power. Vol. 4(2008), p.28.

[2] Zhao W N. Science ＆ Technology in Chemical Industry. Vol. 19(5)(2011), p.6.

[3] Zhang D Q, An Z X. CN. Patent, 1609276 A.

[4] R. Fuchs-Godec. Colloids and Surfaces. Vol. 280(2006), p.130.

[5] Guan B S, Xue X J. Material Protection. Vol. 39(7)(2009), p.96.

[6] Zhang G H, Wang T F. Material Protection. Vol. 44(2)(2011), p.21.

[7] V Branzoi. Materials Chemistry and Physics. 65(2000), p.288.

[8] Zhang D Q, Gao L X. The Electrochemical. Vol. 9(3)(2003), p.308.