Antioxidative effect of Schiff bases and metal chelates in acids
Journal name: World Journal of Pharmaceutical Research
Original article title: Antioxidative effect of schiff base & their metal ion chelates on copper metal in various mineral acid medium
The WJPR includes peer-reviewed publications such as scientific research papers, reports, review articles, company news, thesis reports and case studies in areas of Biology, Pharmaceutical industries and Chemical technology while incorporating ancient fields of knowledge such combining Ayurveda with scientific data.
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Suraj B. Ade
World Journal of Pharmaceutical Research:
(An ISO 9001:2015 Certified International Journal)
Full text available for: Antioxidative effect of schiff base & their metal ion chelates on copper metal in various mineral acid medium
Source type: An International Peer Reviewed Journal for Pharmaceutical and Medical and Scientific Research
Doi: 10.20959/wjpr201717-10386
Download the PDF file of the original publication
Summary of article contents:
Introduction
Corrosion is a chemical process that leads to the deterioration of metals through their interaction with the environment. This study focuses on the corrosion inhibition of copper metal using Schiff bases and their metal chelates, specifically targeting the corrosive action from various mineral acids such as hydrochloric acid (HCl), nitric acid (HNO3), and sulfuric acid (H2SO4). Schiff bases, formed from the condensation reaction of primary amines and active carbonyl compounds, exhibit significant potential as corrosion inhibitors due to their chemical properties and ability to form metal complexes.
The Role of Schiff Bases in Corrosion Inhibition
Schiff bases, particularly the compound 2-[(2-Hydroxy-5-nitrobenzylidene]-amino-4-methyl-phenol (AMPNSA), have demonstrated promising corrosion inhibition capabilities for copper metal in acidic environments. The study evaluates the efficacy of AMPNSA and its metal complexes (including Ti (IV), Zr (IV), Cd (II), and Hg (II)) through weight loss methodology. Results indicate that the presence of Schiff bases and their metal chelates significantly reduced the weight loss of copper wire in corrosive solutions, revealing their inhibitory effects on the corrosion process.
Metal Complexes and Their Enhanced Inhibition Effects
The formation of metal complexes with Schiff bases improves the corrosion protection offered to copper wire. The study presents data on the inhibition efficiency of various complexes, particularly noting that the Ti (IV) and Cd (II) complexes exhibited up to 80% efficiency in corrosive environments, especially in 0.01N HCl. In contrast, other complexes typically showed lower efficiencies, with the Hg (II) complex yielding 60% efficiency in similar conditions. This variation illustrates the importance of metal ion coordination in enhancing the corrosion resistance of Schiff bases in acidic environments.
Acid Medium Impact on Corrosion Inhibition
The effectiveness of corrosion inhibition varied depending on the type and concentration of the acid medium. The study observed that the inhibition efficiency was highest in HNO3, followed by HCl, and then H2SO4, establishing a hierarchy of effectiveness. Notably, as the concentration of the acidic solution increased, so did the corrosion inhibition efficiency. This suggests that the molecular interactions between the corrosion inhibitors and copper metal surfaces are influenced by the acidic environment, affecting the adsorption and subsequent protective action of the inhibitors.
Conclusion
The findings of this research underscore the potential of Schiff bases and their metal complexes as effective corrosion inhibitors for copper in various acidic environments. The adsorption of these inhibitors on the metal surface is critical in mitigating corrosion. Among the types of acids tested, HNO3 proved to be the most effective medium for corrosion prevention, while the Schiff base AMPNSA, particularly in conjunction with specific metal ions, demonstrated significant inhibition capabilities. Continued research in this domain could lead to the development of more efficient corrosion-resistant materials, contributing to improved durability and performance in industrial applications.
FAQ section (important questions/answers):
What is the main purpose of this study?
The study aims to evaluate the corrosion inhibition efficiency of Schiff base (AMPNSA) and their metal chelates against copper corrosion in various mineral acid media.
What specific metals were analyzed in the corrosion study?
The study analyzed the Schiff base and their metal complexes with Titanium (Ti IV), Zirconium (Zr IV), Cadmium (Cd II), and Mercury (Hg II) for corrosion inhibition.
What method was used to evaluate corrosion inhibition?
The Weight Loss Method was used to evaluate corrosion inhibition efficiency by measuring the mass loss of copper wire after immersion in acid solutions.
What were the different acid concentrations used in the experiments?
Different concentrations of acid used were 0.1N, 0.01N, and 0.001N HCl, HNO3, and H2SO4 to test corrosion inhibition.
Which metal complex showed the highest inhibition efficiency?
The titanium (IV) and cadmium (II) complexes of AMPNSA showed the highest inhibition efficiency of 80% in 0.01N HCl.
What conclusion can be drawn from the study results?
The study concluded that Schiff base (AMPNSA) and their metal complexes effectively inhibit copper corrosion, with inhibition efficiency dependent on the acid medium's concentration and type.
Glossary definitions and references:
Scientific and Ayurvedic Glossary list for “Antioxidative effect of Schiff bases and metal chelates in acids”. This list explains important keywords that occur in this article and links it to the glossary for a better understanding of that concept in the context of Ayurveda and other topics.
1) Medium:
In the context of this study, 'medium' refers to the types of acidic solutions used in the experiments, specifically hydrochloric acid (HCl), nitric acid (HNO3), and sulfuric acid (H2SO4) at different concentrations. The choice of medium is crucial because it influences the corrosion behavior of copper and the effectiveness of the inhibitors being tested.
2) Table:
Tables play an essential role in organizing and presenting data clearly. In this research, tables summarize experimental results regarding the inhibition efficiency of Schiff bases and their metal complexes. They provide a concise way to compare the weight loss of copper wire under various conditions, facilitating analysis and interpretation of results.
3) Study (Studying):
The term 'study' encompasses the comprehensive investigation conducted to explore the antioxidative effects of Schiff bases and their metal complexes on copper corrosion. This study aims to evaluate the effectiveness of various inhibitors in different acidic media, contributing to understanding corrosion prevention methods and broadening knowledge in the field of materials chemistry.
4) Surface:
In this research, 'surface' pertains to the interface between the copper metal and the corrosive medium, where chemical interactions occur. The inhibitors function by adsorbing onto the metal surface, thereby reducing the rate of corrosion. Understanding these surface interactions is vital for assessing the effectiveness of corrosion inhibitors.
5) Shri (Sri, Sr):
The term 'Shri' is a respectful title used in Indian culture, often preceding the names of individuals, particularly those in academia or positions of authority. In this document, it denotes the 'Shri Shivaji College,' reflecting the institution where the research was conducted, highlighting its importance and contribution to the study.
6) Surrounding:
The word 'surrounding' refers to the environmental factors influencing corrosion processes, including the chemical composition of the acidic solutions and atmospheric conditions. Corrosion is largely dependent on these surrounding elements, making it imperative to understand how they interact with metals and affect corrosion resistance.
7) Activity:
In this context, 'activity' relates to the biochemical or chemical processes that the Schiff bases exhibit, including their capacity to inhibit corrosion. This term highlights the functional properties of the compounds being studied, indicating their potential effects on biological systems and their roles as corrosion inhibitors.
8) Mineral:
The term 'mineral' in this document discusses the nature of the acids used, often derived from mineral sources. Mineral acids are potent corrosive agents and play a significant role in the corrosion process of metals. Understanding these interactions is critical for evaluating the effectiveness of inhibitors in mitigating corrosion.
9) India:
India is the geographical context in which this research was conducted. As a country with a rich tradition in chemistry and materials science, it provides a significant backdrop for this study. The findings contribute to the scientific community in India and enhance global knowledge on corrosion inhibition.
10) Water:
Water is frequently used in corrosion studies as a solvent for acids or for washing metal samples. In this research, distilled water is employed to clean copper wires before experiments, ensuring accurate measurements. It plays a fundamental role in the preparation of solutions and affects the overall corrosion process.
11) Antibiotic (Antibacterial):
Antibacterial refers to the biological activities of Schiff bases, which have shown various health-related benefits. Although the primary focus of this study is on corrosion, the mention of antibacterial properties highlights the versatile applications of Schiff bases, indicating their potential roles beyond corrosion inhibition in medical or therapeutic contexts.
12) Measurement:
Measurement involves quantifying the parameters of the experiments, such as weight loss to assess corrosion rates. Accurate measurement is critical to derive valid conclusions about the effectiveness of Schiff bases and their metal complexes as inhibitors. It underscores the scientific rigor and methodology employed in the study.
13) Observation:
In scientific research, 'observation' refers to the systematic recording of experimental phenomena. In this study, observations include the corrosion rates and inhibitor efficiencies, leading to insights into the effectiveness of the compounds. It is a fundamental aspect of the scientific method, guiding hypotheses and conclusions.
14) Discussion:
Discussion refers to the section of the research where the results are analyzed and interpreted. It allows researchers to compare their findings with existing literature, explore implications, and suggest future research directions. The discussion provides context for the study's contributions to the field of corrosion chemistry.
Other Science Concepts:
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