influence of inhibitor concentration and temperature on the corrosion inhibition of carbon steel in acidic medium

The current work investigates the effect of inhibitor concentration and temperature on the corrosion inhibition of carbon steel in 1 m hcl by atmp (aminotris-(methylenephosphonic)acid). the response surface methodology (rsm) was applied to design the experiments and optimize the corrosion inhibition process. during experimentation, the performance of the inhibitor was assessed by calculating the inhibition efficiency (i.e). moreover, analysis of variance (anova) through the f-test and p-value was used to evaluate the significance of the model and parameters. in addition, r2 and adjusted-r2 were 97.95 and 97.27%, which confirmed the high accuracy of the model. then, the influence of the parameters on the inhibition efficiency was investigated in the one-factor, contour, and 3d-surface plots using the developed model. finally, the results of numerical optimization demonstrated that the optimum conditions for maximum inhibition efficiency (84.524%) were obtained to be 155 ppm and 30 oc for inhibitor concentration and temperature, respectively.