Skip to main content

Electrochemical, Spectrochemical and Quantum Chemical Studies on Dimedone as Corrosion Inhibitor for Copper in Acetonitrile | Chapter 09 | Advances in Applied Science and Technology Vol. 3

A number of techniques have been applied in the investigation of inhibition abilities of dimedone (DMD) for copper in acetonitrile at 25°C. By potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), the corrosion resistance was found to be increased with inhibitor concentration up to 93.68% inhibition efficiency at 3.00 mM, indicating that DMD molecules can cumulatively adsorb on the copper surface and finally form a protective film on copper-solution interface. This is also supported by the decreasing of copper oxidation in cyclic voltammogram. Polarization curves revealed that DMD is of mixed type inhibitor.

The adsorption of DMD on copper surface obeys the Langmuir isotherm and the adsorption mechanism is of physisorption type. The values of standard energy of adsorption (∆Goads) were found to be in good agreement for both polarization and impedance techniques to be -8.17 and -8.43 kJmol-1 respectively. Fourier Transform Infrared spectroscopy (FT-IR) confirmed the interaction of copper with oxygen on DMD. The mole ratio method suggested that the complexation ratio of copper-DMD is 1:2. Scanning electron microscopy (SEM) of copper surface after immersion in DMD solution indicates the presence of a protective layer on the electrode surface. The frontier molecular orbital energy EHOMO (highest occupied molecular orbital), ELUMO (lowest unoccupied molecular orbital) and the Mulliken charge distribution obtained from Quantum chemical calculations revealed (∆E) for DMD 0.2091 hartree, reflecting strong adsorption of the molecules on copper surface. The enhanced corrosion inhibition is possibly due to the compact film structure blocking electron transfer at the electrode surface. This provides a typical example in understanding the system as well as interpretation of the data by both traditional and advanced technology to support the newly coming technology which would make science much more fruitful.

Author(s) Details

Pipat Chooto
Analytical Chemistry Division, Department of Chemistry, Faculty of Science, Prince of Songkla University, Hatyai, Songkhla 90112, Thailand.

Sontaya Manaboot
Analytical Chemistry Division, Department of Chemistry, Faculty of Science, Prince of Songkla University, Hatyai, Songkhla 90112, Thailand.

View Volume: https://doi.org/10.9734/bpi/aast/v3

Comments

Popular posts from this blog

A Prospective Study about Safety and Efficacy of Perioperative Lidocaine Infusion | Chapter 09 | New Horizons in Medicine and Medical Research Vol. 8

 Opioids cause clinically significant side effects such as respiratory depression, immunosuppression, muscle rigidity, negative inotropism, nausea, vomiting, hyperalgesia, urine retention, postoperative ileus, and drowsiness. Perioperative opioids are a major contributor to the United States' and other countries' opioid epidemics. Non-opioid analgesics, particularly lidocaine, are becoming more common for perioperative use as a result of this. A total of 185 adult patients were randomly assigned to one of two groups: control group I (105 patients) [fentanyl group] or group ii (80 patients) [opioid-free anaesthesia group]. Lidocaine 1.5 mg/kg bolus followed by 1.5 mg/kg/h infusion intraoperatively, and 1.5-2 mg/kg/h infusion for 2-8 hours postoperatively were given to patients in both groups at anaesthetic induction. Intraoperatively, both groups received analgesic adjuvants such as diclofenac 75 mg, paracetamol 1 gm, and mgso4 30-50 mg/kg. If the mean arterial pressure (map)

A Brief Study of Middleware Technologies: Programming Applications and Management Systems | Chapter 15 | Novel Research Aspects in Mathematical and Computer Science Vol. 1

  Many platforms, services, applications, hardware, and operating systems are connected through the middleware layer. Because the middleware layer abstracts much low-level complexity and makes applications and software systems portable, it allows disparate systems to interface and function together in harmony. Middleware technologies enable software engineers to swiftly construct software systems and applications, allowing developers to focus on more important tasks. This chapter examines several types of middleware systems and discusses middleware capabilities, middleware operation, middleware's function in cloud-based systems, and the best middleware platforms to use. Middleware systems are widely utilised and can be found in practically any software system or application. Middleware programmes provide as a link between many sorts of systems and protocols. They serve as a mechanism for various systems. To successfully exchange information, it runs on a variety of operating system

Ethnopharmacological Survey among Traditional Medicine Practitioners in Abidjan (Côte d'Ivoire) for the Management of Pathologies such as Malaria, ENT Diseases, Diarrhea, Typhoid Fever and Anemia | Chapter 05 | New Horizons in Medicine and Medical Research Vol. 8

 Traditional Medicine Practitioners (TMPs) of Côte d'Ivoire are familiar with the therapeutic herbs. Medicinal plants have been shown to be useful in the treatment of common diseases such as malaria (KROA, 2004) and diabetes (N'GUESSAN et al, 2013) in several studies and scientific study. In the Abidjan District, the current policy is to integrate traditional medicine and pharmacopoeia into the national health system in order to improve population health coverage, particularly in the management of commonly encountered diseases such as malaria, ENT diseases, diarrhoea, typhoid fever, and anaemia. This research aims to increase the use of traditional medicine and pharmacopoeia in the national health system. Over the course of three months, fifty (50) PMTs in the District of Abidjan participated in this study. Plant therapists accounted for 30 of the 50 PMTs polled at the end of the study, or 60%. Traditional medicine centres use 61 types of medicinal plants from 36 famili