Melamine–isatin tris Schiff base as an efficient corrosion inhibitor for mild steel in 0.5 molar hydrochloric acid solution: weight loss, electrochemical and surface studies

By alexandreManagement

Melamine–isatin tris Schiff base as an efficient corrosion inhibitor for mild steel in 0.5 molar hydrochloric acid solution: weight loss, electrochemical and surface studies

Corrosion is a major cause of degradation in metals and alloys, leading to their failure and reduced lifespan. Mild steel, in particular, is susceptible to corrosion in acidic environments such as hydrochloric acid solutions. To mitigate the effects of corrosion, various inhibitors have been developed and tested. One such inhibitor is the Melamine–isatin tris Schiff base.

The purpose of this article is to explore the effectiveness of the Melamine–isatin tris Schiff base as a corrosion inhibitor for mild steel in a 0.5 molar hydrochloric acid solution. The article will examine the results of weight loss, electrochemical, and surface studies to determine the inhibitor’s efficiency.

Weight Loss Studies

The weight loss method is one of the most common techniques used to evaluate the effectiveness of a corrosion inhibitor. The experiment involves immersing the mild steel samples in the hydrochloric acid solution, both with and without the inhibitor. The samples were monitored for weight loss over a period of time.

The results of the study showed that the Melamine–isatin tris Schiff base was effective in reducing the rate of corrosion of the mild steel. The weight loss measurements of the samples with the inhibitor were significantly lower than those without the inhibitor. The data suggests that the inhibitor acted as a protective layer, reducing the direct contact of the metal with the corrosive environment.

Overall, the weight loss study indicated that the Melamine–isatin tris Schiff base can be an effective inhibitor for mild steel corrosion in hydrochloric acid solutions.

Electrochemical Studies

The electrochemical study is another common technique used to evaluate the efficiency of a corrosion inhibitor. The study measures the electrochemical parameters of the mild steel in the presence and absence of the inhibitor. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization studies were performed to investigate the inhibitor’s effectiveness.

The results of the study showed that the Melamine–isatin tris Schiff base was able to inhibit the corrosion process effectively. The polarization curve showed a reduction in the anodic and cathodic current densities for the sample with the inhibitor. The EIS results showed an increase in the charge transfer resistance when the inhibitor was present, indicating a hindrance to the corrosion process.

Based on the electrochemical studies, the Melamine–isatin tris Schiff base can be considered a potential candidate for mild steel corrosion inhibition in hydrochloric acid solutions.

Surface Studies

Surface studies are crucial in evaluating the mechanism of action of a corrosion inhibitor. The study examines the surface morphology of the mild steel samples with and without the inhibitor. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were used to investigate the inhibitor’s effectiveness.

The SEM images of the samples with the inhibitor showed a smooth surface with minimal signs of corrosion, in contrast to the rough surface of the sample without the inhibitor. The FTIR spectra of the sample with the inhibitor showed characteristic peaks, indicating the formation of a protective layer by the inhibitor on the mild steel surface.

Based on the surface studies, the Melamine–isatin tris Schiff base was able to form a protective layer on the mild steel surface, inhibiting the corrosion process.

The Melamine–isatin tris Schiff base was evaluated as a potential corrosion inhibitor for mild steel in a hydrochloric acid solution. The weight loss, electrochemical, and surface studies showed that the inhibitor was effective in reducing the rate of corrosion of the mild steel. The inhibitor acted by forming a protective layer on the metal surface, hindering the corrosion process. Based on the findings of the study, the Melamine–isatin tris Schiff base can be considered a promising candidate for mild steel corrosion inhibition in hydrochloric acid solutions.

Future studies should focus on optimizing the concentration and conditions for the inhibitor to maximize its effectiveness and practical application. Furthermore, the potential toxicity and environmental impact of the inhibitor must be evaluated before its commercial use.