L. John Berchmans, S. Venkatakrishna Iyer, V. Sivan and M.A. Quraishi
The influence of a newly synthesised organic compound on the inhibition of corrosion of arsenical aluminium brass in a NaCl solution has been investigated using weight loss…
Abstract
The influence of a newly synthesised organic compound on the inhibition of corrosion of arsenical aluminium brass in a NaCl solution has been investigated using weight loss measurements, potentiodynamic polarization studies and impedance measurements. Different corrosion kinetic parameters obtained from polarisation studies reveal that the inhibition of corrosion of arsenical aluminium brass in NaCl is under mixed control. UV‐reflectance, X‐ray diffraction and scanning electron microscopic studies have also been carried out to understand the mechanism of inhibition of corrosion, and also the morphological changes on the surface of the alloy. The adsorption of this compound on the metal surface from 3.5% NaCl solution is found to obey Temkin’s adsorption isotherm.
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S. Muralidharan, S. Syed Azim, L. John Berchmans and S.V.K. Iyer
The synergistic influence caused by iodide ions on the inhibition of corrosion of mild steel in 0.5M H2SO4 in the presence of n‐hexyl amine (n‐HA) has been studied using…
Abstract
The synergistic influence caused by iodide ions on the inhibition of corrosion of mild steel in 0.5M H2SO4 in the presence of n‐hexyl amine (n‐HA) has been studied using potentiodynamic polarization, linear polarization and a.c impedance technique. n‐HA accelerates the corrosion of mild steel at lower concentrations but inhibits the corrosion at higher concentrations. The addition of iodide ions enhances the inhibition efficiency to a considerable extent. The adsorption of this compound is found to obey Temkin’s adsorption isotherm. The increase in surface coverage in the presence of iodide ions indicates that iodide ions enhance the adsorption of n‐HA on the metal surface. Defines and evaluates synergism parameter (SI). Values of the parameter which are more than unity indicate the fact that the enhanced inhibition efficiency in the presence of iodide ions is only due to synergism and there is a definite contribution from the inhibitor molecule. n‐HA is then adsorbed by coulombic interaction on the metal surface, where iodide ions are already adsorbed, and thus reduces the corrosion rate.
Qu Jun-e, Chen Geng, Wang Hai-ren and Cao Zhi-yong
The purpose of this paper is to investigate the effect of water content of assembly solution on the adsorption behavior and corrosion protection performance of…
Abstract
Purpose
The purpose of this paper is to investigate the effect of water content of assembly solution on the adsorption behavior and corrosion protection performance of 1–tetradecylphosphonic acid [TDPA, CH3(CH2)13P(O)(OH)2] films on aluminum alloy surface in NaCl solution.
Design/methodology/approach
Self-assembled monolayers (SAMs) of TDPA were prepared on the 2024 aluminum alloy surface in TDPA containing ethanol-water solutions with different water contents. The adsorption behavior of the SAMs on the alloy surface and their corrosion protection properties in a 3.5 per cent NaCl solution were characterized by potentiodynamic polarization scan, Fourier-transformed infrared spectroscopy (FTIR) and atomic force microscopy (AFM).
Findings
The FTIR results demonstrated that the TDPA molecules were successfully adsorbed on the 2024 aluminum alloy surface, and the density of the SAMs increased with the increasing water content in the assembly solution. The electrochemical studies and corrosion morphologies observed by AFM showed that the optimal condition is 2 h of assembling in solution B or solution C. The corrosion inhibition efficiency values follow the order solution B ≈ solution C > solution A at the first 2 h assembly and solution B > solution C > solution A while the assembly time exceeded 2 h. The dependence of corrosion inhibition performance of the SAM on the water content and on the assembly time is related to the balancing of competition between TDPA adsorption and dissolution of the alloy oxidation film.
Originality/value
It illustrates potential application prospects of TDPA for surface treatment of aluminum alloy. Via the comparison with our previous work, this paper provides useful information regarding the difference of corrosion inhibition properties of organic phosphonic acid for aluminum alloy between in neutral and in acid solution.
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Shamnamol G.K., Sam John and Jaya Mary Jacob
Surface pretreatment of iron and its alloys to remove stains and inorganic contaminants on the metal surface undergoes dissolution by virtue of the strong acidic media thereby…
Abstract
Purpose
Surface pretreatment of iron and its alloys to remove stains and inorganic contaminants on the metal surface undergoes dissolution by virtue of the strong acidic media thereby increasing its susceptibility to corrosion. The purpose of this study is to explore the corrosion mitigation prospects of green corrosion inhibitors on mild steel surface.
Design/methodology/approach
Corrosion inhibition performance of Garcinia gummi-gutta leaf extract (GGLE) was explored against mild steel in 1 M HCl solution using the weight-loss method, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) techniques. Surface characterization was carried out to study the mechanism of inhibitor action.
Findings
The concentration of GGLE varied from 100 to 6,000 ppm and the result indicates that corrosion inhibition efficiency was amplified by raising the inhibitor concentration. The maximum inhibition efficiency was 82.2% at 6,000 ppm concentration. EIS results show the development of a protective layer of inhibitor molecule over the metal surface and PDP demonstrates that the inhibitor operates as a mixed-type inhibitor. Scanning electron microscopy and atomic force microscopy were executed to assess the surface morphology and roughness, respectively.
Originality/value
To the best of the authors’ knowledge, so far, no studies have been reported on the corrosion inhibition performance of GGLE which is rich in many bioactive components especially hydroxyl citric acid. This work encompasses the corrosion inhibition capability of GGLE against mild steel in an acidic medium.
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Stella Minahan and Patricia Huddleston
Responding to calls for a greater understanding of consumer socialization in young people, this paper aims to investigate daughters' perceptions of shopping with their mothers. It…
Abstract
Purpose
Responding to calls for a greater understanding of consumer socialization in young people, this paper aims to investigate daughters' perceptions of shopping with their mothers. It seeks to provide insights into the significance of the retail shopping experience for young women.
Design/methodology/approach
This exploratory study is based on 30 online and three face‐to‐face interviews with young women aged between 20 and 22. The authors asked the young women who they shopped with and why and to recount some of their best and worst shopping experiences. The interviews were coded and analysed to reveal several recurring themes. This paper reports only on data relating to shopping with their mothers.
Findings
The four major themes that emerged from the interviews with the young women were: gaining independence; trust in mother; the bank of mum; quality time with mum.
Research limitations/implications
The sample is limited to young women in a Midwest university in the USA. Attitudes to consumption and shopping and the mother daughter relationship are culturally derived and may differ in other contexts.
Practical implications
Women are critical to the retail industry and make the bulk of buying decisions for the family. Daughters represent the next generation of this major market force. Marketers and retailers must be cognizant of the power of this relationship.
Originality/value
This paper is the first to report on the daughter‐mother shopping experience, with daughters' perceptions of this experience and the outcomes of the consumer socialisation that occur.
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Yossi Gavish, Aviv Shoham and Ayalla Ruvio
The purposes of this research are to examine the extent to which daughters view their mothers as consumption role models, the extent to which daughters serve as consumption role…
Abstract
Purpose
The purposes of this research are to examine the extent to which daughters view their mothers as consumption role models, the extent to which daughters serve as consumption role models for their mothers, and the extent to which external role models are shared by mothers and their adolescent daughters.
Design/methodology/approach
Two qualitative studies focused on mothers‐adolescent daughters‐vicarious role models interactions as drivers of consumption behaviors in Western cultures. Study 1 included 20 in‐depth interviews with mothers and their adolescent daughters (conducted separately). Study 2 included five of the original dyads interviewed jointly and observed in fashion stores.
Findings
Regarding adolescent daughters' use as role models and fashion markers for their mothers, most mothers confirmed that their adolescent daughters' fashion opinion was very important. Second, based on consumer socialization arguments, mothers served as role models for their adolescent daughters. Most dyads shop for fashion items together and in the same stores. Regarding the issue of cognitive versus chronological ages, the studies suggest that there is a gap between mothers' cognitive and chronological ages in support of cognitive age theory and the youthfulness ideal of Western cultures. Notably, such a gap mostly failed to materialize for adolescent daughters. Hence, consumption similarity appears to be driven more by the gap for mothers than the gap for daughters. Finally, external role models such as celebrities did not have a great influence on mothers or their adolescent daughters.
Originality/value
The research used in‐depth interviews with and in‐store observation of mothers and adolescent daughters. Future research might use similar interviews with younger daughters. Another extension of the work reported here that can provide triangulation for the findings is to change from a qualitative to a quantitative methodology.
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As the leisure industry matures, it is important for marketers to have a clear understanding of why people choose to consume specific leisure services. The paper proposes that…
Abstract
As the leisure industry matures, it is important for marketers to have a clear understanding of why people choose to consume specific leisure services. The paper proposes that “timestyle”, or how a person customarily perceives and uses time, influences the choice of leisure goals and resultant leisure services. Individuals’ timestyles can be characterized in terms of social, temporal, planning, and polychronic orientations. Data from qualitative research suggest that all four dimensions of timestyle can have systematic effects on leisure choices. Knowledge of the timestyle concept and its antecedent influences should allow leisure marketers to better understand and target the motivations that underlie consumer decisions on leisure services.
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Kishore Thomas John and K. Shreekrishna Kumar
Kerala is one of India's most advanced states in human development and other social indices. This study aims to look at the management education scenario in Kerala from a…
Abstract
Purpose
Kerala is one of India's most advanced states in human development and other social indices. This study aims to look at the management education scenario in Kerala from a macro-perspective and examines the existing trends, major issues and present challenges facing the sector.
Design/methodology/approach
The study is driven by previously unexplored secondary data published by India's apex technical education regulator–All India Council for Technical Education (AICTE). Qualitative and quantitative assessments are assimilated from the organization, dissection and categorization of unit-level data.
Findings
Business schools (B-schools) in the state are facing acute distress in enrolments. There are intra-regional variations in institution count and occupancy rates. The vast majority of the institutions have no accreditation at all. The entire sector is facing a protracted decline.
Research limitations/implications
The study has relied primarily on descriptive statistics considering a single discipline within the higher education sector in Kerala. Future studies should look at other disciplines (engineering, medicine) simultaneously. Use of statistical methods like panel data regression would be beneficial to find hidden trends in cross-sectional and longitudinal time-series data.
Practical implications
Management education in Kerala is facing an existential crisis. This has implications for the state's economic development. The paper creates strong imperatives for government policymaking to forestall the complete decline of the sector.
Social implications
A highly literate state with advanced human development indices need not be a suitable location for building a knowledge-based economy. Government policy has strong implications for the development and sustenance of higher education. The relationship between government and business schools are symbiotic.
Originality/value
The paper maps the progression of B-schools from local to global. A typology of privately funded B-schools is proposed. The conceptual framework advanced in this study can contribute to further literature development. The suggested policy initiatives are applicable not only to Kerala but also to other tightly regulated markets.