Effect of laser power on amorphous forming capability and corrosion performance of laser thermal sprayed Al-Ni-Fe-Gd coatings

2018 ◽  
Vol 65 (4) ◽  
pp. 417-429
Author(s):  
Yan Baoxu ◽  
Kong Dejun
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Protection ◽  
Laser Power ◽  
Design Methodology ◽  
Thermal Spraying ◽  
Offshore Platforms ◽  
Corrosion Performance ◽  
Content Type

PurposeThe amorphous Al-Ni-Fe-Gd coatings were fabricated to improve anti-corrosion performance of offshore platforms.Design/methodology/approachThe amorphous Al-Ni-Fe-Gd coatings were first fabricated on S355 steel using the laser thermal spraying.FindingsThe amorphous forming capability and corrosion resistance increases with the laser powers increasing.Research Limitations/implicationsThe amorphous Al-Ni-Fe-Gd coatings were applied on S355 steel of offshore platforms to increase its long-term heavy and anti-corrosion protection.Originality/valueThe amorphous Al-Ni-Fe-Gd coatings were first fabricated using a laser thermal spraying, improving its anti-corrosion.

Microstructure and corrosion resistance of Ni/Cr3C2-NiCr composite coating

2019 ◽  
Vol 66 (4) ◽  
pp. 471-478 ◽  
Author(s):  
Majid Hosseinzadeh ◽  
Abdol Hamid Jafari ◽  
Rouhollah Mousavi ◽  
Mojtaba Esmailzadeh
Keyword(s):  
Corrosion Resistance ◽  
Composite Coating ◽  
Design Methodology ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Thermal Spraying ◽  
Content Type ◽  
Bath Solution ◽  
Electrochemical Deposition Method ◽  
Base Composite

Purpose In this study, electrochemical deposition method which have cheaper equipment than thermal spraying methods and is available for the production of composite coatings were used. Design/methodology/approach Composite coatings were electrodeposited from a Watts's bath solution in which the suspended Cr3C2-NiCr particles were dispersed in the bath solution during deposition. Potentiodynamic polarization and electrochemical impedance spectroscopy techniques have been used to evaluate the corrosion resistance of the composite coating in the 3.5 Wt.% NaCl solution. Findings It was found that the submicron Cr3C2-NiCr particles distributed uniformly in the coating and depend on the current density of deposition, different amount of particles can be incorporated in the coating. The results showed that the corrosion resistance of the Ni/ Cr3C2-NiCr composite coatings is more comparable to the pure nickel coating. Originality/value Production of Ni-base composite coating from an electrolytic bath containing Cr3C2-NiCr particles is possible via electrodeposition.

Tribocorrosion behaviors of thermal spraying WC/Ni60 coated 316L stainless steel in artificial seawater

2019 ◽  
Vol 71 (6) ◽  
pp. 741-748 ◽  
Author(s):  
Eryong Liu ◽  
Yingxin Zhang ◽  
Xiang Wang ◽  
Zhixiang Zeng ◽  
Huiling Du ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Design Methodology ◽  
316L Stainless Steel ◽  
Thermal Spraying ◽  
Deionized Water ◽  
Artificial Seawater ◽  
Dry Sliding ◽  
Content Type ◽  
Better Than

Purpose This paper aims to improve the tribocorrosion properties of 316L, thus WC/Ni60 coated 316L was prepared by thermal spraying technique. Design/methodology/approach Composition and microstructure of WC/Ni60 coating was investigated, and tribological properties of 316 L and WC/Ni60 coating were studied under dry sliding, deionized water and artificial seawater. Findings The results showed that WC/Ni60 coating was lamellar structure, and the phase composition consisted of γ-Ni solid solution, carbides and borides. Furthermore, the hardness and corrosion resistance of 316 L in static seawater and wear resistance in dry sliding were improved by WC reinforced nickel-based coating. Furthermore, tribocorrosion results demonstrated that wear resistance of WC/Ni60 coating was also significantly better than 316 L, especially for higher load at artificial seawater. The reason can be attributed to the fact that the passive film of WC/Ni60 coating consisted of tungsten carbide, Ni(OH)2 and FeOOH for WC/Ni60 coating and only FeOOH for 316 L. Originality/value According to this study, it can be concluded that WC phases acted as a role in resisting the wear damages. Meanwhile, Ni-based materials performed well in corrosion resistance. Thus, the combined-effect Ni-based alloys and WC phases in WC/Ni60 coating showed better tribocorrosion performance than 316 L.

Electrochemical corrosion performances of laser thermal sprayed amorphous Al–Ti–Ni coatings in marine environment

2020 ◽  
Vol 67 (2) ◽  
pp. 140-149
Author(s):  
Kong Dejun ◽  
Chen Haixiang
Keyword(s):  
Corrosion Resistance ◽  
Marine Environment ◽  
Laser Power ◽  
Electrochemical Corrosion ◽  
Amorphous Coating ◽  
Corrosion Performance ◽  
Scanning Calorimetry ◽  
Content Type ◽  
X Ray ◽  
Electrochemical Corrosion Resistance

Purpose The purpose of this paper is to investigate the effects of laser power on the electrochemical corrosion performance in 3.5% NaCl, 0.1 M H2SO4 and 0.1 M NaOH solutions, which provided an experimental basis for the application of Al–Ti–Ni amorphous coating in marine environment. Design/methodology/approach Amorphous Al–Ti–Ni coatings were fabricated on S355 structural steel by laser thermal spraying (LTS) at different laser powers. The surface and cross-section morphologies, chemical element distribution, phases and crystallization behaviors of obtained coatings were analyzed using a scanning electron microscope, energy-dispersive X-ray spectroscope, X-ray diffraction and differential scanning calorimetry, respectively. The effects of laser power on the electrochemical corrosion performances of Al–Ti–Ni coatings in 3.5% NaCl, 0.1 M H2SO4 and 0.1 M NaOH solutions were investigated using an electrochemical workstation. Findings The crystallization temperature of Al–Ti–Ni coatings fabricated at the laser power of 1,300 and 1,700 W is ∼520°C, whereas that fabricated at the laser power of 1,500 W is ∼310°C. The coatings display excellent corrosion resistance in 3.5% NaCl and 0.1 M NaOH solutions, while a faster dissolution rate in 0.1 M H2SO4 solution. The coatings fabricated at the laser power of 1,300 and 1,700 W present the better electrochemical corrosion resistance in 3.5% NaCl and 0.1 M NaOH solutions, whereas that fabricated at the laser power of 1,500 W exhibits the better electrochemical corrosion resistance in 0.1 M H2SO4 solution. Originality/value In this work, Al-wire-cored Ti–Ni powder was first on S355 steel with the laser power of 1,300, 1,500 and 1,700 W, and the effects of laser power on the electrochemical corrosion performance in 3.5% NaCl, 0.1 M H2SO4 and 0.1 M NaOH solutions were investigated using an electrochemical workstation.

Intertwining CSR with strategy – the way ahead

2014 ◽  
Vol 14 (2) ◽  
pp. 211-219 ◽  
Author(s):  
Shital Jhunjhunwala
Keyword(s):  
Business Strategy ◽  
Design Methodology ◽  
Business Models ◽  
Corporate Strategy ◽  
Sustainable Business ◽  
Socially Responsible ◽  
Content Type ◽  
Sustainable Business Models ◽  
Corporate Social

Purpose – The purpose of this paper is to emphasize the importance and means of making corporate social responsibility (CSR) an integral part of corporate strategy with the help of case studies. Design/methodology/approach – The article explores the transformation of business from being egocentric to socially responsible. With the use of examples it demonstrates how integrating CSR into strategy can create sustainable business models. Findings – Firms need to develop a framework for integrating CSR into their business strategy for long term successful survival. Social implications – Corporates and society are intertwined and mutually dependent. Business cannot survive without society's acquiescence nor succeed without its active support. Originality/value – The article explains the benefits of CSR and how to make it an integral part of business strategy to gain a competitive advantage.

Building a new resilience

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Peter Buell Hirsch
Keyword(s):  
Cyber Security ◽  
Design Methodology ◽  
Business Leaders ◽  
Human Potential ◽  
Global Business ◽  
Content Type ◽  
Business System ◽  
New Business ◽  
Practical Implications

Purpose The purpose of the viewpoint is to examine the various ways in which the pandemic has exposed structural vulnerabilities in global business infrastructures that have long existed and been long ignored. It urges business leaders not to return to a “new normal” but make fundamental changes to ensure that their businesses are truly resilient and can withstand future threats more effectively. Design/methodology/approach The viewpoint looks at the various kinds of vulnerability to which businesses are exposed – such as supply chain, human capital, cyber security and climate change – and proposes ways to ensure that businesses, as well as shareholders and government entities work together to build true resilience. Findings At its core, the viewpoint exposes the various ways in which businesses have turned a blind eye to vulnerabilities that have always lurked just below the surface and suggests. The argument is that to secure the long-term future of our global business system, we can no longer remain oblivious to fundamental weaknesses in our infrastructures. Research limitations/implications The viewpoint looks selectively at the available data and is, therefore, by definition, subjective and non-comprehensive. Practical implications If businesses and shareholders truly take the recommendations of this viewpoint to heart, we can build a more resilient future through long-term investments in risk management infrastructures of all kinds that will secure a more prosperous and stable future. Social implications Developing a more resilient and stable global business infrastructure will help reduce the business volatility deriving from last minute responses to predictable threats. This will, in turn, help provide more stable, fulfilling employment, especially in developing countries that will act as a fly wheel for the secure development of human potential around the world. Originality/value While there has been much speculation of what the “new business normal” will look like once the pandemic has been conquered, this is, the author believes, the first piece to look concretely on how we can not only “build back better” but build back more soundly for the long term.

scholarly journals Accountability reporting objectives of Māori organizations

2018 ◽  
Vol 30 (4) ◽  
pp. 433-443 ◽  
Author(s):  
Russell Craig ◽  
Rawiri Taonui ◽  
Susan Wild ◽  
Lũcia Lima Rodrigues
Keyword(s):  
New Zealand ◽  
Design Methodology ◽  
Indigenous Communities ◽  
Core Values ◽  
Annual Reports ◽  
Content Type ◽  
Cultural Activities ◽  
The Core ◽  
Regional Associations

Purpose This paper aims to highlight the accountability reporting objectives of four Māori-controlled organizations. The examples cited reflect the core values of the indigenous Māori people of New Zealand (Aotearoa) and help demonstrate how these values are manifest in the accountability reporting of Māori-controlled organizations. Design/methodology/approach Narrative sections of ten annual reports of two small and two large Maori organizations, drawn variously from their financial years ending in the calendar years 2009 to 2014, are read closely. These organizations represent diverse tribal and regional associations in terms of size, scope and structure; and in terms of the business, social and cultural activities they pursue. Findings Three core Māori values are identified: spirituality (wairuatanga); intergenerationalism and restoration (whakapapa); and governance, leadership and respect (mana and rangatiratanga). The commitment to these values and the way this commitment is reflected in accountability reports of Maori organizations, is presented. Originality/value The examples provided, and the associated discussion, should help inform reporting initiatives of organizations that are seeking better accountability in terms of their long-term engagement with indigenous communities, the environment and broader society.

Professional trilemma of students with family business experience

Kybernetes ◽  
2016 ◽  
Vol 45 (3) ◽  
pp. 446-460 ◽  
Author(s):  
Jaka Vadnjal ◽  
Predrag Ljubotina
Keyword(s):  
Family Business ◽  
Design Methodology ◽  
Future Research ◽  
Related Factors ◽  
Senior Student ◽  
Content Type ◽  
East European ◽  
Educational Backgrounds ◽  
The Mean

Purpose – Family businesses represent the largest share of small-sized firms in majority of economies around the world. Having in mind the global economic situation this trend is expected to be continued. With the goal of better understanding of the process of transferring the business to the next generation, which ensures a long-term success, the purpose of this paper is to investigate expectations of student’s with family business background. Design/methodology/approach – The research addresses the issue of an individual’s perception of entrepreneurship and the related factors that influence individual’s decision on whether to build a career as an employee, become a successor of family business or start own business as an independent entrepreneur. The authors separately analyzed West European (data from another study), East European and Slovenian senior student population for the purpose of comparative study. Students were surveyed and binominal regression was used for statistics. Findings – The results show differences between investigated populations and positions Slovenian students in the mean. The authors anticipate that differences are caused by historical, cultural and educational backgrounds. This challenging area is raising a lot of sub-questions for possible future research. Originality/value – The value of the study is in the replication of the existing methodology from the benchmarking study and result comparison.

The effect of green purchasing on purchasing performance: the moderating role played by long-term relationships and strategic integration

2016 ◽  
Vol 31 (2) ◽  
pp. 312-324 ◽  
Author(s):  
Javier González-Benito ◽  
Gustavo Lannelongue ◽  
Luis Miguel Ferreira ◽  
Carmen Gonzalez-Zapatero
Keyword(s):  
Design Methodology ◽  
Purchasing Management ◽  
Environmental Practices ◽  
Content Type ◽  
Strategic Integration ◽  
Green Purchasing ◽  
The Impact ◽  
The Relationship ◽  
Moderating Role

Purpose – The purpose of this paper is to analyse the relationship between the environmental management of purchases and firm performance. The authors examine the moderating role played by two variables: the establishment of long-term relationships with suppliers and the strategic integration of the purchasing function. Design/methodology/approach – The authors conduct an empirical study on a sample of 100 Portuguese firms. Findings – Evidence reveals that green purchasing management improves the performance of the purchasing function, although the impact is greater when the organisation forges lasting alliances with its suppliers. Originality/value – This paper contributes to the study of the consequences of introducing environmental practices into the purchasing function, especially with regards to the formation of a panel of sustainable suppliers. Specifically, this research provides evidence to show that the implementation of those practices has positive impacts on the operating performance of the purchasing function and that the said effect is greater when a firm establishes long-term relationships with its suppliers.

A directed content analysis of viewpoints on the changing patterns of Lean Six Sigma research

2019 ◽  
Vol 31 (4) ◽  
pp. 641-654 ◽  
Author(s):  
Bryan A. Rodgers ◽  
Jiju Antony ◽  
Zhen He ◽  
Elizabeth A. Cudney ◽  
Chad Laux
Keyword(s):  
Continuous Improvement ◽  
Six Sigma ◽  
Design Methodology ◽  
Lean Six Sigma ◽  
Current Status ◽  
Short Term ◽  
Content Type ◽  
Changing Patterns ◽  
Practical Implications

Purpose The purpose of this paper, builds on previous studies that explored the research patterns over 15 years, is to consider the current status of the integration of Lean and Six Sigma. More specifically, this research addresses whether Lean and Six Sigma are stronger together and explores the reasons why Lean researchers and practitioners may be less likely to integrate Six Sigma in their work. Design/methodology/approach The research utilises a survey of 25 established and respected academics and practitioners from 16 countries. The questionnaire is analysed using a direct content approach and coded in NVivo. Findings The findings suggest that challenges may lie in the perception and understanding of statistics as well as short-term rather than long-term focus on improvement. The findings also suggest that academics and practitioners believe that Lean Six Sigma has developed over time and will continue to develop and improve as a methodology rather than being replaced with a new methodology. Research limitations/implications The survey has a sample size of 25, albeit all respondents are established and very experienced practitioners and academics. Practical implications For organisations that are introducing or refreshing their continuous improvement initiatives, this research identifies some of the challenges and provides the opportunity to address them to maximise the opportunities for success and sustainability. Originality/value The value of this paper is that it further addresses the debate over the integration of Lean and Six Sigma for many organisations which still employ Lean alone, but beyond this it explores how they will continue to develop and whether they are a permanent edition to the quality management landscape or a transition to something else.

HC and financial performance with two HRM strategies

2017 ◽  
Vol 66 (4) ◽  
pp. 459-478 ◽  
Author(s):  
Nopadol Rompho
Keyword(s):  
Human Capital ◽  
Regression Analysis ◽  
Financial Performance ◽  
Lead Time ◽  
Design Methodology ◽  
Strategy Choice ◽  
Content Type ◽  
The Relationship ◽  
Practical Implications

Purpose The purpose of this paper is to examine the relationship between levels of human capital and financial performance of firms that use two distinct human resource management (HRM) strategies. Design/methodology/approach A survey of 128 HRM managers was conducted to assess differences in human capital between firms using different HRM strategies. A multiple regression analysis was used to investigate the relationship between firms’ human capital and financial performance. Findings The results show that companies employing a make-organic strategy have a higher level of human capital than companies employing a buy-bureaucratic strategy. There was no relationship between the level of human capital and long term financial performance of firms with both make-organic and buy-bureaucratic strategies. Research limitations/implications This research contributes toward understanding the effect of HRM strategy and facilitates an optimal strategy choice depending on the organization. However, this study did not consider the lead time between changes in human capital and the effect on financial performance. Practical implications The research encourages firm managers to understand the value of human capital, preparing them for changes in the future. Originality/value This study is among the first to investigate the relationship between human capital and financial performance considering different HRM strategies.

Sign in / Sign up

Export Citation Format

Share Document