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Article
Publication date: 11 September 2009

A. Elango, V.M. Periasamy and M. Paramasivam

The purpose of this paper is to study to minimize the self‐corrosion rate of Type 57S aluminium containing (97.7 per cent Al, 2 per cent Mn and 0.03 per cent Mg) in 2 M NaOH…

644

Abstract

Purpose

The purpose of this paper is to study to minimize the self‐corrosion rate of Type 57S aluminium containing (97.7 per cent Al, 2 per cent Mn and 0.03 per cent Mg) in 2 M NaOH solution containing 0.2 M zinc oxide and 700 ppm of polyaniline.

Design/methodology/approach

The approach is used to measure weight loss and polarization measurements.

Findings

Results obtained show that as the amount of polyaniline is increased, the self‐corrosion rate of Alloy 57S aluminium decreases appreciably. Additionally, the open circuit potential is more in the case of 700 ppm level of polyaniline (−1.630 V) compare to 600 ppm level of polyaniline (−1.587 V). From this paper, it is also observed that the anodic polarization is greater than the cathodic polarization, thereby indicating that the overall corrosion of Alloy 57S 2 M NaOH containing 0.2 M ZnO and 700 ppm of polyaniline is under anodic control.

Originality/value

The results of the study clearly reveal that the overall corrosion of Alloy 57S aluminium in 2 M NaOH containing 0.2 M ZnO and 700 ppm of polyaniline is under anodic control. Hence, the 57S grade aluminium can be used as a potential candidate (anode) in alkaline batteries.

Details

Anti-Corrosion Methods and Materials, vol. 56 no. 5
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 12 January 2010

A. Elango, V.M. Periasamy, M. Paramasivam and E. Rakesh

The purpose of this paper is to show how to develop inhibition 57S aluminium in 2M NaOH solution.

381

Abstract

Purpose

The purpose of this paper is to show how to develop inhibition 57S aluminium in 2M NaOH solution.

Design/methodology/approach

The approach is used to measure gravimetric and polarization measurements.

Findings

The results of the paper clearly reveal that the 0.2 M ZnO with 700 ppm polyaniline in N‐methyl‐2‐pyrrolidone solution is found to offer inhibition up to 71.2 per cent.

Originality/value

The paper deals with the development of newer inhibitor based on polyaniline. Gravimetric and galvanostatic methods were employed to evaluate inhibition efficiency.

Details

Anti-Corrosion Methods and Materials, vol. 57 no. 1
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 31 May 2024

Monojit Das, V.N.A. Naikan and Subhash Chandra Panja

The aim of this paper is to review the literature on the prediction of cutting tool life. Tool life is typically estimated by predicting the time to reach the threshold flank wear…

216

Abstract

Purpose

The aim of this paper is to review the literature on the prediction of cutting tool life. Tool life is typically estimated by predicting the time to reach the threshold flank wear width. The cutting tool is a crucial component in any machining process, and its failure affects the manufacturing process adversely. The prediction of cutting tool life by considering several factors that affect tool life is crucial to managing quality, cost, availability and waste in machining processes.

Design/methodology/approach

This study has undertaken the critical analysis and summarisation of various techniques used in the literature for predicting the life or remaining useful life (RUL) of the cutting tool through monitoring the tool wear, primarily flank wear. The experimental setups that comprise diversified machining processes, including turning, milling, drilling, boring and slotting, are covered in this review.

Findings

Cutting tool life is a stochastic variable. Tool failure depends on various factors, including the type and material of the cutting tool, work material, cutting conditions and machine tool. Thus, the life of the cutting tool for a particular experimental setup must be modelled by considering the cutting parameters.

Originality/value

This submission discusses tool life prediction comprehensively, from monitoring tool wear, primarily flank wear, to modelling tool life, and this type of comprehensive review on cutting tool life prediction has not been reported in the literature till now. The future suggestions provided in this review are expected to provide avenues to solve the unexplored challenges in this field.

Details

International Journal of Quality & Reliability Management, vol. 42 no. 2
Type: Research Article
ISSN: 0265-671X

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Article
Publication date: 19 February 2013

M. Dewan, J. Liang, M. Wahab and A. Okeil

Heat-treatable AA-6061-T651 Aluminum alloys (Al-Mg-Si) have found considerable importance in structural and aerospace applications for their high strength to weight ratio and…

116

Abstract

Heat-treatable AA-6061-T651 Aluminum alloys (Al-Mg-Si) have found considerable importance in structural and aerospace applications for their high strength to weight ratio and improved corrosion resistance properties. Intrinsic weld defects, post-weld residual stresses, and microstructural changes are the key factors for performance reductions and failures of welded structures. Gas-Tungsten-Arc-Welding (TIG/GTAW) was carried out on AA-6061-T651 plates with Argon/Helium (50/50) as the shielding gases. Non-destructive Phased-Array-Ultrasonic-Testing (PAUT) was applied for the detection and characterization of weld defects and mechanical performances. Ultrasonic technique was used for the evaluation of post-weld residual stresses in welded components. The approach is based on the acoustoelastic effect, in which ultrasonic wave propagation speed corresponds to the magnitude of stresses present within the materials. To verify the PAUT's residual stress results, a semi-destructive hole-drilling technique was used; and observed analogous results. The effects of post-weld-heat-treatment (PWHT) on the residual stresses, grain size, micro-hardness, and tensile properties are also studied. The grain size and micro-hardness values are studied through Heyn's method and Vickers hardness test, respectively. Lower residual stresses are observed in post-weld heat-treated specimens, which are also confirmed from microstructural and micro-hardness studies. The PWHT enhanced tensile properties for the redistribution of microstructures and residual stresses.

Details

World Journal of Engineering, vol. 10 no. 1
Type: Research Article
ISSN: 1708-5284

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Article
Publication date: 4 August 2022

Biranchi Narayan Kar, Paulson Samuel, Jatin Kumar Pradhan and Amit Mallick

This paper aims to present an improvement to the power quality of the grid by using a colliding body optimization (CBO) based proportional-integral (PI) compensated design for a…

193

Abstract

Purpose

This paper aims to present an improvement to the power quality of the grid by using a colliding body optimization (CBO) based proportional-integral (PI) compensated design for a grid-connected solar photovoltaic-fed brushless DC motor (BLDC)-driven water pumping system with a bidirectional power flow control. The system with bidirectional power flow allows driving the pump at full proportions uninterruptedly irrespective of the weather conditions and feeding a grid when water pumping is not required.

Design/methodology/approach

Here, power quality issue is taken care of by the optimal generation of the duty cycle of the voltage source converter. The duty cycle is optimally generated by optimal selection of the gains of the current controller (i.e. PI), with the CBO technique resulting in a nearly unity power factor as well as lower total harmonic distortion (THD) of input current. In the CBO technique, the gains of the PI controller are considered as agents and collide with each other to obtain the best value. The system is simulated using MATLAB/Simulink and validated in real time with OPAL RT simulator, OP5700.

Findings

It was found that the power quality of grid using the CBO technique has improved much better than the particle swarm optimization and Zeigler–Nichols approach. The bidirectional flow of control of VSC allowed for optimum resource utilization and full capacity of water pumping whatever may be weather conditions.

Originality/value

Improved power quality of grid by optimally generation of the duty cycle for the proposed system. A unit vector tamplate generation technique is used for bidirectional power transfer.

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Book part
Publication date: 6 December 2024

Marco Simões-Coelho, Ariane Roder Figueira and Eduardo Russo

Motivated by the advancements in the discussions of environmental, social, and governance globally, this study aims to improve the knowledge of corporate sustainability…

Abstract

Motivated by the advancements in the discussions of environmental, social, and governance globally, this study aims to improve the knowledge of corporate sustainability motivations and engagement through a qualitative cross-company case study analysis of two consumer goods multinationals, Natura & Co. headquartered in Brazil, and The Coca-Cola Company, headquartered in the USA. The cases were chosen to compare the two companies’ corporate sustainable development (SD) motivations, one headquartered in an emerging and the other in a developed country. This study also assesses the balance between these corporations’ global and local sustainability agendas, comparing their worldwide engagement promises to their actual deliveries vis-à-vis national-institutional arrangements. As contributions to the field, comparing the cases surfaced valuable insights and additional theoretical abstractions on corporate sustainability, including proposing a new SD-engagement typology.

Details

Responsible Firms: CSR, ESG, and Global Sustainability
Type: Book
ISBN: 978-1-83753-963-5

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Article
Publication date: 7 December 2021

Svyatoslav Kotusev, Sherah Kurnia and Rod Dilnutt

Information architecture (IA) is often understood as a comprehensive master plan for organizational data assets and is widely considered as an essential component of broader…

999

Abstract

Purpose

Information architecture (IA) is often understood as a comprehensive master plan for organizational data assets and is widely considered as an essential component of broader enterprise architecture (EA). However, the status and practical operationalization of IA still remain largely unclear. In order to clarify these questions, this paper investigates what instruments related to IA are actually employed in organizations.

Design/methodology/approach

This study builds on the analysis of architecture practices in 27 diverse organizations. Based on the semi-structured interviews with architects and the examination of utilized architectural documents, we explore IA-related instruments with their usage scenarios that have been adopted in the studied organizations.

Findings

The authors identify 12 distinct instruments used in the industry and analyze in detail their features, properties and relationships. This paper analysis shows that these instruments are rather diverse and largely inconsistent across different organizations. The study findings also suggest that IA cannot be considered as a comprehensive plan for information, but rather as a variable set of loosely related instruments and practices that help organizations manage information.

Originality/value

The study offers a unique perspective on the concept of IA, as it is practiced in the industry today, as well as a critical scrutiny of the respective prescriptions abundant in the existing literature. Although this study does not attempt to theorize on the findings, it makes a significant empirical contribution by offering a solid evidence-based view of IA and its key instruments currently missing in the available literature.

Details

Aslib Journal of Information Management, vol. 74 no. 3
Type: Research Article
ISSN: 2050-3806

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Article
Publication date: 30 November 2020

Padmi Nagirikandalage, Ben Binsardi, Kaouther Kooli and Anh Ngoc Pham

The purpose of this study is to investigate the resistance in management accounting practices (MAPs) in a developing economy in the manufacturing and service sectors in Vietnam.

896

Abstract

Purpose

The purpose of this study is to investigate the resistance in management accounting practices (MAPs) in a developing economy in the manufacturing and service sectors in Vietnam.

Design/methodology/approach

Data collection was carried out using survey questionnaires in Vietnamese language. The questionnaires were distributed to selected respondents from the manufacturing and service organisations in Vietnam. Textual structuralism was used to analyse different categories of data, i.e. survey questionnaires, photos and qualitative texts obtained from the literature.

Findings

The findings indicate that the usage of MAPs is more prevalent in the manufacturing sector than in the service sector. In addition, various traditional and contemporary MAPs are being used concurrently in Vietnam, which challenges the classical twofold dichotomy between mere socialism and mere neoliberalism.

Research limitations/implications

The textual and photographic structuralism is used in this study to analyse primary data (geography and society and time) in a static setting. Hence, it does not analyse the research phenomena in a dynamic equilibrium setting to view the development of the research phenomena over time. Further research could expand data collection to include longitudinal and dynamic settings.

Practical implications

MAPs can be implemented in economic systems ranging from command to capitalist systems. Although most countries in the world follow a mixed economic system, specific MAPs could be designed for a transitional economic system such as that of Vietnam. This affects both theorists and practitioners in Vietnam applying sustainable MAPs to boost a country's competitiveness during transition.

Originality/value

This study expands understanding of the conformity of MAPs in relation to economic systems under the Communist Party of Vietnam (CPV) – the ruling party of the Socialist Republic of Vietnam. Understanding the differences in the way these MAPs are utilised constitutes an essential area of the accounting discipline to advance MAPs in Vietnamese enterprises and progress theoretical development of sustainable MAPs.

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Article
Publication date: 12 August 2019

Margarita Ivanovna Skiba and Viktoria Vorobyova

This paper aims to propose a simple, eco-friendly method for obtaining colloidal solutions of silver nanoparticles (Ag NPs) by using of contact non-equilibrium low-temperature…

106

Abstract

Purpose

This paper aims to propose a simple, eco-friendly method for obtaining colloidal solutions of silver nanoparticles (Ag NPs) by using of contact non-equilibrium low-temperature plasma in presents polysorbate-80 and to assess their antibacterial activity in composite materials (beads) for water treatment process.

Design/methodology/approach

Silver nanoparticles were prepared in aqueous AgNO3 solution by using of contact non-equilibrium low-temperature plasma in the present of nonionic surfactant polysorbate-80 (Tween 80) as capping agent. Ultraviolet–visible (UV) spectroscopy, X-ray diffraction and zeta potential analysis were used to study the formation and properties of silver nanoparticles.

Findings

The formation of silver colloidal solutions in the presence of capping agent under plasma discharge is characterized by the presence of peak λmax = 380 – 402 nm in the spectra. The addition of sodium alginate into the reaction mixture allows synthesizing stable colloidal silver solutions. The average size of formed silver particles is up to 50 nm. Ag NPs exhibited an excellent bactericidal activity against both gram-positive and gram- negative bacteria. Composite beads prepared using nonionic surfactant were found to be effective in disinfecting the Staphylococcus aureus to different extents.

Research limitations/implications

Further studies are necessary for confirmation of the practical application, especially of the toxicity of Ag NPs, as well as the sorption properties of the alginate beads with Ag NPs.

Practical implications

The method provides a simple and practical solution to improving the synthesis of colloidal solutions of Ag NPs for water treatment process.

Originality/value

Contact nonequilibrium low-temperature plasma can be used as an effective technique for synthesis of nanomaterials.

Details

Pigment & Resin Technology, vol. 48 no. 5
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 4 April 2018

Bushra Rafique, Mudassir Iqbal, Tahir Mehmood and Muhammad Ashraf Shaheen

This review aims to focus on recent reported research work on the construction and function of different electrochemical DNA biosensors. It also describes different sensing…

2004

Abstract

Purpose

This review aims to focus on recent reported research work on the construction and function of different electrochemical DNA biosensors. It also describes different sensing materials, chemistries of immobilization probes, conditions of hybridization and principles of transducing and amplification strategies.

Design/methodology/approach

The human disease-related mutated genes or DNA sequence detection at low cost can be verified by the electrochemical-based biosensor. A range of different chemistries is used by the DNA-based electrochemical biosensors, out of which the interactions of nanoscale material with recognition layer and a solid electrode surface are most interesting. A diversity of advancements has been made in the field of electrochemical detection.

Findings

Some important aspects are also highlighted in this review, which can contribute in the creation of successful biosensing devices in the future.

Originality/value

This paper provides an updated review of construction and sensing technologies in the field of biosensing.

Details

Sensor Review, vol. 39 no. 1
Type: Research Article
ISSN: 0260-2288

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