Modazar as promising corrosion inhibitor of carbon steel in hydrochloric acid solution

Abstract

Modazar drug was tested as corrosion inhibitor for carbon steel in 1 M HCl solution using chemical (weight loss and gasometric) and electrochemical (open {circdeg;}uit potential, potentiodynamic polarization, electrochemical frequency modulation and electrochemical impedance spectroscopy) techniques. The results showed that the inhibitory efficiency increased with the increase in drug concentration reaching a maximum value of 92.3% at 300 ppm while it decreases with increasing the temperature. Polarization curves showed that Modazar drug is a mixed type inhibitor but the cathode is more polarized than the anode. The drug was adsorbed physically on the C-steel surface obeying Langmuir adsorption isotherm. The morphology of the surface of the specimens was analyzed using atomic force microscopy, energy dispersion spectroscopy and scanning electron microscopy. The results obtained from chemical and electrochemical techniques are in good agreement.ARTICLE HISTORY

Synthesis of 3,4,5-trihydroxy-2-[(hydroxyimino) methyl] benzoic acid as a novel rust converter

“…Metal corrosion is a serious problem all over the world and therefore a number of methods and materials have been developed to minimize the corrosion processes and environment problems (1)(2)(3)(4)(5)(6). Among the frequently reported protection methods to prevent metal corrosion, such as organic or inorganic coating (7,8), electrochemical protection (9) and corrosion inhibition (10)(11)(12)(13), the most effective and economic technique is the application of coating, particularly anticorrosive coatings (14,15). Metal surfaces require cleaning process such as acid pickling or abrasive blasting before the modification with anticorrosive coating (16).…”

Inhibition Efficiency of Eco-friendly Green Inhibitors (Ocimum tenuiflorum Phytocompounds) on Corrosion of High Carbon Steel in HCl Environment using Thermometric and Electrochemical Methods

“…On the other hand, inhibition efficiency of the two inhibitors decreased as temperature was increased and increase with inhibitor concentration. The apparent decrease in % IE as temperature was raised from 303, 318 and 333 K for AEOTR and FEOTR (Tables 1 and 2) could be related to change of adsorption mode from chemisorption to physisorption caused by desorption of adsorbed inhibitor as a result of increased solution agitation due to higher rate of hydrogen gas evolution [3,[6][7][8][9][10]. This is verified from the higher values of inhibition efficiency noticed at the lowest temperature (303 K) against the highest (333 K).…”

Electrochemical Study of Candesartan Drug as Corrosion Inhibitor for Carbon Steel in Acid Medium

“…This might be because of the adsorption of the Candesartan on the CS surface and make the passive film keeping in mind the end goal to obstruct the dynamic site introduce on the CS surface. The inhibitor particle association with dynamic locales of CS surface, resulting in a reduction in the contact between CS and the destructive medium and consecutively displayed superb restraint impact [53,54].…”