CalicotomeExtract as a Friendly Corrosion Inhibitor forCarbon Steel in Polluted NaClSolution: Chemical and Electrochemical Studies

Abstract

T HIS study describes the ability of Calicotome extract (CE) to inhibit the corrosion of C-steel in polluted NaCl (3.5%NaCl+ 16 ppm Na 2 S) solution which carried out using chemical (weight loss, WL)and electrochemical(potentiodynamic polarization, PP, electrochemical impedance spectroscopy, EIS and electrochemical frequency modulation, EFM) techniques. Langmiur isotherm was tested to describe the adsorption behavior of C-steel surface. The PP measurements revealed that the adsorption of extract affects both anodic and cathodic reactions. The protection efficiency (% IE) increases by rising concentrations, while it lowers with raising the temperature. The C-steel surface morphology in the presence and absence of CE has been tested via Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and (FTIR) spectroscopy measurements. The obtained data from different techniques are in good agreement. Graphical AbstractBlank 50 ppm 100 ppm 150 ppm 200 ppm 250 ppm 300 ppm log i , mA cm -2 comparison of %IE of 300 ppm CE obtained by different techniques, as shown from the figure that all techniques gave almost similar results. ConclusionThe CE shows the corrosion protection for C-steel in polluted NaCl solution, where IE ratio improved by the rise of compound concentration. The IE is decreasing with the rise of temperature resulting from the destruction of the adsorbed CE molecules present on the C-steel surface. The presence of CE on the surface follows the Langmiur equation. Tafel curves showed that CE is mixed-kind inhibitor. C dl reduced while R ct rises by the increasing the CE concentration. The adsorbed film of the CE on the C-steel surface was proved by SEM, AFM and FTIR analysis.

Experimental and theoretical optimization of Chelidonium Majus (Papaveraceae) extract as an environmentally friendly inhibitor for corrosion of a-brass in nitric acid solution

“…The use of plant extracts as corrosion inhibitors, as the following research indicates this role. Calicotome extract [10], Hibiscus rosa-sinensis Linn [11], Beet root extract in well water [12], spirulina solution which confirms with electrochemical techniques [13], spirulina [14]. The present work aims to find a naturally occurring cheap and environmentally safe substance that could be used for inhibiting the corrosion of αbrass.…”

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

“…The application of plant extracts as barriers to corrosion, as the following research indicates this role. Calicotome extract [14], Hibiscus rosa-sinensis Linn [15]Beet root extract in well water [16], spirulina solution which con rms with electrochemical techniques [17], spirulina [18]. Finding a naturally occurring, inexpensive, and ecologically friendly chemical that might be utilized to prevent corrosion of c-steel is the goal of the current research.…”

Synthesis and Evaluation of New Poly Cationic Surfactants as Corrosion Inhibitors of Carbon Steel in Formation Water

“…Cationic surfactants, which are most relevant to the present study, usually fall into one of the following categories: long-chain amines or polyamines and their quaternized derivatives. Moreover, Aliphatic and aromatic amines, mono-, di-, or polyamines and their salts, all are used as corrosion inhibitors [24][25][26]. Using of polymeric cationic surfactants as corrosion inhibitors still need more studies, so this study focused on the preparation a new polymeric cationic surfactant based on triethanolamine acrylate monomer to increase the active sites along the polymer chain which are responsible for adsorption on the metal surface together with long hydrophobic polymer chains which act as a barrier against the corrosive medium.…”