Adenium obesum Extract as a Safe Corrosion Inhibitor for C-Steel in NaCl Solutions: Investigation of Biological Effects

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Adenium obesum Extract as a Safe Corrosion Inhibitor for C‑Steel in NaCl Solutions: Investigation of Biological Effects Abd El‑Aziz S. Fouda1   · Mohamed Eissa2,3 Received: 18 October 2019 / Revised: 20 June 2020 / Accepted: 13 July 2020 © Springer Nature Switzerland AG 2020

Abstract In this paper, the impacts of polluted NaCl (3.5% NaCl + 16 ppm ­Na2S) on the corrosion of C-steel (CS) at different temperatures and in presence of different concentrations of Adenium obesum extract (AOE) were considered by chemical, electrochemical techniques and other surface examination tests. The outcomes demonstrate that the corrosion rate of CS diminishes with increment of inhibitor doses. % IE reached to ≈90% at 300 ppm AOE.The acquired outcomes showed that the examined extract is physically adsorbed on the CS surface and followed Temkin adsorption isotherm. The potentiodynamic polarization (PP) information revealed that this extract goes about as mixed kind inhibitor. The results got from the various techniques are in great agreement. Keywords  Adenium obesum extract (AOE) · Carbon steel · Polluted NaCl · biological effect

1 Introduction Consumption of materials causes enormous misfortunes in the economy of numerous nations because of the colossal measure of assets expected to lessen it. The corrosion inhibition of metals, particularly of CS, has gotten some consideration as a result of its astounding mechanical properties, minimal effort and far reaching use in the business, for example, substance handling, oil generation, refining, transportation, pipelines, mining, development industry, marine applications, hence, looks into in the field of consumption restraint of steel is important. Seawater contains the remaining parts of dead life forms, coral reefs, ships, and pontoons which all are decay and prompt acceleration of gases, for example, H ­ 2S and ­Na2S and different gases respond with chlorine and hydrogen deliver contaminated NaCl. Among the few strategies for consumption, control is the utilization of inhibitors. The investigations of plant extracts as consumption inhibitors are of awesome enthusiasm from an ecological point of view and are drawing * Abd El‑Aziz S. Fouda [email protected] 1



Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt

2



College of Science & Humanities‑Harimlae, Shaqra University, Shaqraa, Saudi Arabia

3

Present Address: Higher Institute of Engineering & Technology, KMA, Alex, Egypt



in a huge level of consideration [1–3]. The well-being and ecological issues of corrosion inhibitors emerged in businesses has dependably been a worldwide concern. Plant extract is minimal effort and natural safe, so the primary favorable circumstances of utilizing plant removes as corrosion inhibitors are financial and safe condition. A few examinations have been completed on the security of corrosion of metals and compounds by plant extracts [4–15]. Nonetheless, there is as yet a requirement for look into on different plants can be utilized as inhibitors in mechan