In this work, Suregada multiflora leaves extract (SMLE) was studied as an environmentally friendly green corrosion inhibitor on iron metal in HCl solution by weight loss measurement. Metallic corrosion is one of the greatest problems in developed and developing countries due to unusual wastages of metallic instruments in the industrial sector. Metallic corrosion arises due to environmental effects. Corrosion is unfavourable as many direct and indirect costs arise due to the damages such as productivity losses, interruptions, breakdowns, environmental pollutions, and even some legal actions. The best method to reduce corrosion is the use of inhibitors.
A corrosion inhibitor represents the chemical compound that decreases the rate of corrosion of metallic substances when added to a gas or liquid phase. The inhibitors are mixed with solutions that are in direct contact with metal which prevents the anodic or cathodic reactions in an electrochemical cell that mitigates the corrosion. The plant extracts are biologically acceptable, eco-friendly, or green corrosion inhibitors which can respond in a proper way to mitigate the corrosion without damaging the eco-system of the environment. In the market, large numbers of inhibitors are available. Different organic and inorganic compounds are used for these purposes. But few of them are environmentally friendly.
Appropriate inhibitor selection is a very difficult task. Presently use of natural products like plant extracts is an emerging concept to make an eco-friendly planet. There are numerous studies where Plant-based corrosion inhibitors have been used. Recently green inhibitors attract the spotlight due to some of their advantages like they are eco-friendly, biodegradable, and nontoxic and does not contain any heavy metals. Plant extracts are found to be rich sources of phytochemicals which can be a good substitution for traditional toxic inhibitors. Leaves extract has been in the centre of interest of researchers due to its high content of phytochemicals compare to the other parts of the plants.
Inhaltsverzeichnis (Table of Contents)
- 1. INTRODUCTION
- 2. EXPERIMENTAL
- 2.1 Material Preparation
- 2.2 Preparation of Leaves Extract
- 2.3 Weight Loss Study
- 3. RESULTS AND DISCUSSION
- 3.1 Weight loss measurement
- 3.2 Adsorption isotherms
- 3.3 Thermodynamics parameters
- 3.4 The Activation energy (Ea)
- 4. CONCLUSION
- 5. REFERENCES
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
The main objective of this study was to investigate the effectiveness of Suregada multiflora leaves extract (SMLE) as a green corrosion inhibitor for mild steel in a 1M HCl solution. The study aimed to evaluate the inhibition efficiency of SMLE at different temperatures and concentrations, and to understand the adsorption mechanism involved.
- Evaluation of SMLE as a green corrosion inhibitor.
- Determination of inhibition efficiency at varying temperatures and concentrations.
- Analysis of the adsorption mechanism using isotherm models.
- Investigation of thermodynamic parameters and activation energy.
- Contribution to the development of eco-friendly corrosion inhibition strategies.
Zusammenfassung der Kapitel (Chapter Summaries)
1. INTRODUCTION: This chapter introduces the significant problem of metallic corrosion, particularly iron corrosion in acidic environments, highlighting its economic and environmental impact. It emphasizes the need for eco-friendly corrosion inhibitors and introduces the use of plant extracts as a sustainable alternative to traditional, often toxic, inhibitors. The chapter positions Suregada multiflora leaves extract (SMLE) as a potential green inhibitor and outlines the study's focus on evaluating its performance using weight loss measurements.
2. EXPERIMENTAL: This chapter details the methodology employed in the study. It describes the preparation of the mild steel specimens, emphasizing the meticulous cleaning and polishing process to ensure consistent surface conditions. The preparation of the SMLE involves a detailed description of the extraction process from the leaves of the Suregada multiflora plant, highlighting the steps taken to ensure a standardized extract for analysis. Finally, the chapter outlines the weight loss method used to assess the corrosion inhibition efficiency of SMLE, specifying the experimental conditions (temperature, concentration, and exposure time) used in the study. The equations used to calculate inhibition efficiency, surface coverage, and corrosion rate are also presented.
3. RESULTS AND DISCUSSION: This chapter presents and interprets the results obtained from the weight loss measurements. The detailed analysis focuses on the effects of temperature, concentration, and exposure time on the inhibition efficiency of SMLE. The chapter likely discusses the fitting of experimental data to various adsorption isotherms (Langmuir, Flory-Huggins, Langmuir-Freundlich) to determine the adsorption mechanism of SMLE on the mild steel surface. Furthermore, it likely explains the calculated thermodynamic parameters and activation energy, providing insights into the nature of the inhibitor-surface interactions and the mechanism of corrosion inhibition.
Schlüsselwörter (Keywords)
Corrosion inhibitor, Suregada multiflora, green corrosion inhibitor, mild steel, HCl, weight loss, Langmuir isotherm, inhibition efficiency, adsorption isotherms, thermodynamics, activation energy.
Frequently Asked Questions: Analysis of Suregada multiflora Leaves Extract as a Green Corrosion Inhibitor
What is the main objective of this study?
The primary goal is to investigate the effectiveness of Suregada multiflora leaves extract (SMLE) as an environmentally friendly corrosion inhibitor for mild steel in a 1M HCl solution. The study aims to determine its inhibition efficiency under varying temperatures and concentrations, and to understand the underlying adsorption mechanism.
What are the key themes explored in this research?
The research focuses on evaluating SMLE's performance as a green corrosion inhibitor, determining its inhibition efficiency at different temperatures and concentrations, analyzing the adsorption mechanism using isotherm models, investigating thermodynamic parameters and activation energy, and contributing to the development of eco-friendly corrosion inhibition strategies.
What are the key chapters and their contents?
Chapter 1: Introduction provides background on metallic corrosion, particularly iron corrosion in acidic environments, emphasizing the need for eco-friendly inhibitors and introducing SMLE as a potential solution. Chapter 2: Experimental details the methodology, including mild steel preparation, SMLE extraction, and the weight loss method used to assess inhibition efficiency. Chapter 3: Results and Discussion presents and interprets the weight loss data, analyzing the effects of temperature and concentration, fitting data to adsorption isotherms (e.g., Langmuir), and discussing thermodynamic parameters and activation energy. Chapter 4: Conclusion summarizes the findings, and Chapter 5: References lists the cited sources.
What methods were used to assess the corrosion inhibition?
The study primarily employed a weight loss method to evaluate the corrosion inhibition efficiency of SMLE under different experimental conditions (temperature, concentration, and exposure time). Equations for calculating inhibition efficiency, surface coverage, and corrosion rate were used to analyze the data.
What adsorption isotherm models were likely used?
The study likely employed various adsorption isotherm models, including Langmuir, Flory-Huggins, and Langmuir-Freundlich, to determine the adsorption mechanism of SMLE on the mild steel surface. The best-fitting model would provide insights into the interaction between the inhibitor and the metal surface.
What thermodynamic parameters and activation energy were investigated?
The research investigated thermodynamic parameters and activation energy to gain a deeper understanding of the inhibitor-surface interactions and the mechanism of corrosion inhibition. These parameters help to elucidate the nature of the adsorption process and the effectiveness of SMLE as an inhibitor.
What are the keywords associated with this research?
Corrosion inhibitor, Suregada multiflora, green corrosion inhibitor, mild steel, HCl, weight loss, Langmuir isotherm, inhibition efficiency, adsorption isotherms, thermodynamics, activation energy.
What is the significance of using Suregada multiflora leaves extract?
The use of Suregada multiflora leaves extract represents a sustainable and eco-friendly approach to corrosion inhibition, offering a potential alternative to traditional, often toxic, inhibitors. The study explores its potential as a green corrosion inhibitor for mild steel in acidic environments.
- Quote paper
- Abhik Chatterjee (Author), Jiban Saha (Author), Suvankar Debbarman (Author), Dilliram Pokhrel (Author), 2020, Suregada Multiflora Leaves Extract as a Green Corrosion Inhibitor, Munich, GRIN Verlag, https://www.grin.com/document/1184708
