Eco-Friendly Piper cubeba official extract corrosion inhibition of c-steel in 1M sulphamic acid

The examination of the inhibitory rates of Piper cubeba official extract (P. cubebaOE) on C-steel in 1.0 M H 2 NSO 3 H solution is covered in the research article. Utilizing chemical and electrochemical methods in addition to theoretical calculations such as DFT, Fukui function, the study produced results that indicated up to 96.0% inhibition at 300 ppm at 25 o C., P. cubebaOE is an inhibitor of mixed kind. Through increasing concentration, Nquist diagrams showed that the charge transfer resistance elevated and the capacitance of the double layer decreased. It was also discovered that the inhibition process follows the Langmuir isotherm, demonstrating the generation of a monolayer on the surface of the C-steel.