Innovative Method for Coating of Natural Corrosion Inhibitor Based on Artemisia vulgaris

• Published in: Materials Vol. 14; no. 9; p. 2234
• Main Authors: Pineda Hernández, Daniel Alejandro, Restrepo Parra, Elisabeth, Arango Arango, Pedro José, Segura Giraldo, Belarmino, Acosta Medina, Carlos Daniel
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 26.04.2021; MDPI
• Subjects: Coating; Corrosion; Corrosion inhibitors; Corrosion products; Corrosion rate; Corrosion resistance; Corrosion resistant steels; EIS; Electrochemical impedance spectroscopy; Fourier transforms; Hazardous materials; Infrared spectroscopy; mild steel; Nyquist plots; organic coating; Protective coatings; Spectrum analysis; Steel; tafel; Thermogravimetric analysis; Thermogravimetry; Useful life; organic coating; tafel; corrosion; mild steel; EIS
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma14092234

In this work, the production of a novel methodology for the application of natural corrosion inhibitors on steel, using an autoclave is presented. Tests were carried out using . The inhibitor was produced with a simple soxhlet extraction process using 15 g of and 260 mL of Ether. Once the inhibitor was produced, the steel was immersed in it, to form a coating that protects the material against corrosion. Thermogravimetry analyzes (TGA) were performed on the inhibitor, to determine the degradation temperature; it was observed that, at 321 °C, the loss of organic mass begins. After applying the inhibitor to the steel, the Fourier Transform Infrared Spectroscopy (FTIR) technique was used to determine the vibrational bands and the difference between the spectra for the steels before and after the coating was applied. For the evaluation of the method efficiency, Electrochemical Impedance Spectroscopy (EIS) and polarization resistance tests were performed, where Nyquist diagrams and Tafel curves were obtained, for steels with and without treatment. In this case, an increase of 93% in the corrosion resistance, and an 88% decrease in the corrosion rate were observed, proving that this methodology can be used to protect steel against corrosion and extend the steel's useful life.