Corrosion inhibition of mild steel in hydrochloric acid solution by the expired Ampicillin drug

Abstract

This study examines the utilization of the expired drug, namely ampicillin, as a mild steel corrosion inhibitor in an acidic environment. The inhibitor was evaluated using weight loss and electrochemical measurement accompanied with surface analytical techniques. The drug showed a potential inhibitory efficiency of > 95% at 55 °C. The inclusion of the inhibitor increased the charge transfer resistance at the steel-solution interface, according to impedance analyses. According to potentiodynamic polarisation measurements, expired ampicillin drug significantly decreased the corrosion current density and worked as a mixed-type corrosion inhibitor. The Langmuir adsorption isotherm was followed by the adsorption of ampicillin drug on the steel substrate, exhibiting an association of physical and chemical adsorption mechanisms. The surface study performed using contact angle and scanning electron microscopy–energy dispersive spectroscopy (SEM–EDS) measurements supported the inhibitor adsorption on the steel substrate.

An environmentally sustainable approach for the utilization of Erigeron bonariensis as a green inhibitor against weathering steel corrosion in acidic media

“…This is indicated by alterations in the absorption maximum value ( λ max ) or changes in absorbance, suggesting the creation of a complex between the steel surface and inhibitor molecules. 27 …”

“…When a working electrode is immersed in an electrolyte solution and a voltage is applied, redox reactions occur at the electrode's surface, leading to the flow of electrons and the generation of a current. 27 This current is then measured as a function of the applied potential. The working electrode was made using the weathering steel rod, and the outer covering was provided with the help of Araldite standard epoxy adhesive, as shown in Fig.…”

Corrosion Inhibition of Expired Cefazolin Drug on Copper Metal in Dilute Hydrochloric Acid Solution: Practical and Theoretical Approaches

“…Scientists have recently employed expired drugs, such as Ampicillin [ 22 ], Antidiabetic [ 23 ], Herbal [ 24 ], Ampicillin and Flucloxacillin [ 25 ], Acyclovir and Omeprazole [ 26 ], Ceftin [ 27 ], Antihypertensive [ 28 ], Antifungal [ 29 ], 6–mercaptopurine and 6–thioguanine [ 30 ], Ciprofloxacin [ 31 ], Glucosamine [ 32 ], Flunarizine Hydrochloride [ 33 ], Amiodarone [ 34 ], Phenylphrine [ 35 ], Betamethasone [ 36 ], Podocip [ 37 ], Gentamycine [ 38 ], Lioresal [ 39 ], Midazolam [ 40 ], Fluoxymesterone [ 41 ], Atorvastin [ 42 ], etc., to inhibit the corrosion of different metals.…”

Unraveling the Adsorption Mechanism and Anti-Corrosion Functionality of Dextrin and Inulin as Eco-Friendly Biopolymers for the Corrosion of Reinforced Steel in 1.0 M HCl: A Thermodynamic and Kinetic Approach

“…Therefore, extensive efforts are dedicated to advancing proficient and cost-effectively accommodating ways to reduce steel corrosion [ 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Employment of corrosion inhibitors is regarded as one of such significant ways [ 22 , 23 , 24 , 25 , 26 ]. Corrosion inhibitors are organic compounds comprising electron donor atoms and unsaturated bonds, which allow them to be adsorbed on the metal surface and protect such surfaces from the aggressive media [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ].…”