Inhibition Performance of a New Series of Mono-/Diamine-Based Corrosion Inhibitors for HCl Solutions
- Ali A. Al-Taq (Saudi Aramco) | Shaikh A. Ali (King Fahd University of Petroleum and Minerals) | Hisham A. Nasr-El-Din (Texas A&M University)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- December 2009
- Document Type
- Journal Paper
- 627 - 633
- 2009. Society of Petroleum Engineers
- 1.8 Formation Damage, 1.11 Drilling Fluids and Materials, 4.1.2 Separation and Treating, 4.2.3 Materials and Corrosion
- corrosion testing, acid treatments, corrosion inhibitors, amine inhibitors, synthetic inhibitors
- 1 in the last 30 days
- 498 since 2007
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New mono- and diamine compounds were synthesized from dodecylamine and 1,12-dodacanediamine and evaluated as acid corrosion inhibitors for low-carbon steel. The inhibition behavior of these compounds was examined using gravimetric and electrochemical methods (linear polarization and Tafel plot). Weight-loss tests were conducted in 1M HCl at 60°C for six hours. To simulate acid stimulation treatments, other weight-loss tests were conducted using typical acid stimulation concentrations of 4.1 and 7.7M HCl at 60°C for 2 hours. The effects of corrosion inhibitor type, concentration, and acid concentration were investigated.
Aromatic and multiple bonds substituents introduced to mono- and diamine compounds were found to enhance inhibition performance compared to the starting materials (dodecylamine and 1,12-dodacanediamine). This is attributed to the p-electrons present in aromatic and to polymerization of substituents with multiple bonds. Both dodecylamine derivatives with a triple bond or an aromatic substituent exhibited excellent protection in 4.1M HCl. However, the derivative with a triple bond showed the best protection (98%) at 7.7M HCl. This result is very promising and suggests that this corrosion inhibitor has a good potential to be used in acid stimulation treatments conducted in oil and gas wells.
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