Picralima nitida LEAVES EXTRACT FOR INHIBITION OF MILD STEEL CORROSION IN 1.0M HYDROCHLORIC ACID SOLUTION

Testing the inhibition efficiency of the castor oil leaf as corrosion inhibitor of mild steel in H2SO4

“…Inhibitor concentration ( 0.2 g/L - 1.0 g/L ) , temperature ( 303 K–333 K ) and time ( 8 h–24 h ) were the factors considered while efficiency of the inhibitor ( calculated using Equation (1) ) was the response of the study. The RSM aided the analysis of the response in line with previous reports [ 12 , 27 ]. The Analysis of Variance and graphical representation of the inhibition process were presented.…”

“…PDP was used to identify the types of inhibitors that castor oil leaf has. Potentiodynamic polarization study was carried out according to the method used by previous research reports [ 12 , 27 , 31 ]. It was conducted with the aid of potentiostat/galvanostat 263 electrochemical workstation.…”

“…The data of the degree of surface coverage (Equation (6) ; which has direct relationship with efficiency, Equation (1) at various inhibitor's concentrations aided the examination of the application of various adsorption isotherms; the suitability of Langmuir, Frumkin, Temkin and Flory-Huggins of Equations (7) , (8) , (9) , (10) respectively [ 12 , 26 ]). Then, the Gibb's energy (ΔG ads ) was obtained using Equation (11) , that depends on gas constant ( R ), temperature ( T ) and adsorption equilibrium constant ( K ).…”

“…The maintenance of metal-based structures requires operations such as pickling (acid cleaning), in which metal (such as mild steel) surface is cleaned by acid medium [ 12 , 13 ]. Such metal-acid contact (occasioned by acid cleaning) often creates a condition for the metal dilapidation as side effect of the pickling.…”

Optimization of the inhibition corrosion of carbon steel in an acidic medium by a novel eco-friendly inhibitor Asphodelus ramosus using response surface methodology

“…This strategy can be used to optimize experimental results achieved by weight loss measurements and is, therefore, essential to any research in this area. RSM offers the possibility to significantly reduce the number of experiments required to fully evaluate the performance of inhibitors, thus minimizing the cost and duration of the experiment [23][24][25][26][27][28][29][30].…”