Introduction
As a one of the most important corrosion inhibitors, quaternary ammonium salt corrosion inhibitor has good stability, good dissolution and dispersion, wide variety and easy preparation, and is widely used in the field of oil and gas, machinery, petroleum, chemical industry, light industry, metallurgy, construction, electroplating. Among them, the quaternary ammonium salt corrosion inhibitor has excellent corrosion inhibition effect in all aspects, especially for high temperature concentrated acid system; at the same time, it can effectively inhibit the corrosion system of H2S, CO2 and HCl in oilfield water injection and oil refining system play a unique corrosion inhibition effect.
Figure 1. The oil fields in remote areas.
Mechanism
The positively charged quaternary ammonium salt corrosion inhibitor forms competitive adsorption with hydrogen ions in hydrochloric acid solution. Due to the large overall molecular weight and strong attraction, the quaternary ammonium salt ions are preferentially adsorbed by the negative charges on the metal surface before the hydrogen ions, thereby forming a dense adsorption layer and inhibiting the progress of the corrosion reaction. At the same time, the non-polar groups of quaternary ammonium salt form a hydrophobic protective film on the metal surface, which hinders the exchange of substances in the corrosion reaction, thereby reducing the corrosion rate of the metal.
Advantages
- Quaternary ammonium salt corrosion inhibitors only need to use a small amount to achieve good results.
- Quaternary ammonium salt corrosion inhibitor is easy to use and simple to operate.
- Quaternary ammonium salt corrosion inhibitor is non-toxic, harmless, cheap and easy to obtain.
What Can Alfa Chemistry Do for You?
Alfa Chemistry has a professional team with many years of experience and has focused on the preparation and application of quaternary ammonium salt corrosion inhibitor. We are pleased to use our extensive experience and advanced platform to offer the most qualified products and the best service to satisfy each demand from our customers in quaternary ammonium salt corrosion inhibitor. If you want to know more about quaternary ammonium salt corrosion inhibitor, please contact us.
Reference
- Sathiyanarayanan S.; et al. Corrosion inhibition effect of tetramines for mild steel in 1M HCl. Appl. Surf. Sci., 2005, 241(3-4): 477-484.