Corrosion Inhibition Study of Brass in Simulated Cooling Water by Triazole Derivatives, Cetyltrimethylammonium Bromide and Their Mixture

Abstract

The effect of triazole (TR), 3-amino-1,2,4-triazole (ATA) and cetyltrimethylammonium bromide (CTAB) on the inhibition of brass corrosion in simulated cooling water system has been studied using electrochemical measurements, scanning electron microscopy (SEM) observations and energy dispersive X-ray (EDX) analysis. The potentiodynamic polarization study reveals that these inhibitors inhibit both cathodic and anodic reactions, indicating a mixed-type control of inhibition and their inhibition depend on the nitrogen number in their structure. It shows that the ATA is the best inhibitor. The interference between CTAB and TR derivatives against corrosion has been also studied. So, a large passive current plate is observed directly from the corrosion potential in the presence of formulation. In addition, the operational parameters effect on the performance of this formulation is also investigated. It shows that its inhibition efficiency increases with pH, immersion time and the presence of corrosion products and takes its performance by increasing in temperature. The SEM/EDX data confirm that the formulation is a corrosion and scale inhibitor.

Experimental and Theoretical Study of Corrosion Inhibition of Mild Steel in 1.0 M HCl Medium by 2(-4( hloro phenyl-1H- benzo[d]imidazol)-1-yl)phenyl)methanone

“…This can be explained by the decrease in surface heterogeneity as a result of the CBIPM molecules adsorption on the mild steel surface. The same result was found by other authors, and they explained by the molecule adsorption of inhibitors via N and S atoms in the inhibitor molecules 31,32 . In the same way, the relaxation time constant (τ dl ) values increase with inhibitor concentration as well and the time of adsorption process becomes therefore much higher which means a slow adsorption process 33 .…”

Corrosion inhibition studies for mild steel in 5.0 M HCl by substituted phenyltetrazole

“…This can be explained by the decrease in surface heterogeneity as a result of the phenyltetrazole molecules adsorption on the mild steel surface. The same result was found by other authors, and they explained by the molecule adsorption of inhibitors via N and S atoms in the inhibitor molecules (Finšgar and Merl 2014;El Bakri et al 2016). …”

Corrosion and scale studies of copper used in Moroccan industrial cooling water systems

“…8. This model was used in our previous works to describe the behavior of copper and brass in cooling water solution, with or without inhibitors (Elhousni et al 2016;El Bakri et al 2016;Rochdi et al 2014). In this model, R s is the solution resistance, R ct is the charge transfer resistance, Q dl corresponds to the capacitance of the double layer, and the R ad and the element Q ad correspond to the film formation of corrosion and scale products.…”