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1 – 5 of 5Zhifeng Lin, Likun Xu, Xiangbo Li, Li Wang, Weimin Guo, Chuanjie Wu and Yi Yang
The purpose of this paper is to examine the performance of a fastener composite coating system, sherardized (SD) coating/zinc-aluminum (ZA) coating whether it has good performance…
Abstract
Purpose
The purpose of this paper is to examine the performance of a fastener composite coating system, sherardized (SD) coating/zinc-aluminum (ZA) coating whether it has good performance in marine environment.
Design/methodology/approach
In this paper, SD coating was fabricated on fastener surface by solid-diffusion method. ZA coating was fabricated by thermal sintering method. Corrosion behaviours of the composite coating were investigated with potentiodynamic polarization curves, open circuit potential and electrochemical impedance spectroscopy methods.
Findings
Neutral salt spray (NSS) and deep sea exposure tests revealed that the composite coating had excellent corrosion resistance. Polarization curve tests showed that corrosion current density of the sample with composite coating was significantly decreased, indicating an effective corrosion protection of the composite coating. OCP measurement of the sample in NaCl solution demonstrated that the composite coating had the best cathodic protection effect. The good corrosion resistance of the composite coating was obtained by the synergy of SD and ZA coating.
Practical implications
SD/ZA coating can be used in marine environment to prolong the life of carbon steel fastener.
Social implications
SD/ZA composite coating can reduce the risk and accident caused by failed fastener, avoid huge economic losses.
Originality/value
A new kind of composite coating was explored to protect the carbon steel fastener in marine environment. And the composite coating has the long-term anti-corrosion performance both in simulated and marine environment test.
Details
Keywords
Li-Xiang Wang, Da-Hai Xia, Shi-Zhe Song, Yashar Behnamian and Likun Xu
This paper aims to quantify atmospheric corrosion by image analyses. The corrosion extent, form and distribution of corrosion product on Q235B and T91 steels exposed to a Zhoushan…
Abstract
Purpose
This paper aims to quantify atmospheric corrosion by image analyses. The corrosion extent, form and distribution of corrosion product on Q235B and T91 steels exposed to a Zhoushan marine atmosphere over one year are characterized by image analysis.
Design/methodology/approach
Image analysis of corrosion images were achieved using the gray value, wavelet analysis and fuzzy Kolmogorov–Sinai (K–S) entropy.
Findings
As corrosion becomes extensive, the gray value of corrosion images decreases, and the energy value of nine subimages after wavelength decomposition decreases. Fuzzy K–S entropy increases as localized corrosion propagates but decreases as uniform corrosion spreads.
Originality/value
The methods proposed in this work open a new way for fast corrosion evaluation of metallic materials exposed to atmospheric conditions.
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Keywords
Meng Jiang, Ze-Ming Wang, Zhong-Ze Zhao, Kun Li and Fu Yang
The purpose of this paper is to demonstrate a simple fiber sensor for simultaneous measurement of liquid refractive-index (RI) and temperature.
Abstract
Purpose
The purpose of this paper is to demonstrate a simple fiber sensor for simultaneous measurement of liquid refractive-index (RI) and temperature.
Design/methodology/approach
The sensor structure is formed by a long period fiber grating cascaded with a section of thin-core fiber. The long period fiber grating is fabricated on single mode fiber, followed by a section of 20-mm length thin-core fiber which is a modal interferometer.
Findings
Cladding mode interference between long period fiber grating and thin-core fiber modal interferometer is weak in the experimental investigation. Both of these two cladding mode type fiber devices are sensitive to surrounding RI and temperature. So the RI and temperature can be measured simultaneously by monitoring the spectral characteristics of the compound sensor. The sensitivity is calibrated and sensor matrix is provided in the experiment.
Originality/value
This proposed fiber sensor is simple, tough, cost-effective and suitable for discriminate the liquid RI and temperature with high sensitivity.
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Keywords
Hazel Melanie Ramos, Likun Zhan and Harini Jayasinghe
This paper aims to explore the succession intentions of daughters in family businesses in Sri Lanka by shedding light on the motives behind their willingness to succeed in the…
Abstract
Purpose
This paper aims to explore the succession intentions of daughters in family businesses in Sri Lanka by shedding light on the motives behind their willingness to succeed in the family business.
Design/methodology/approach
A qualitative approach using semi-structured interviews was used to explore the factors that may influence succession intentions among a group of seven prospective successor-daughters.
Findings
Findings showed that while a majority of the daughters sampled have positive succession intentions, there were a few who were either undecided or unwilling. Interestingly, what motivated some daughters to be willing successors was also considered demotivating for others. Daughters perceived succession in family businesses to be impacted by both personal and family background, traditional gender-role expectations and other socio-cultural factors.
Originality/value
Findings from this study provide key insights into gender-related issues with regard to succession in family businesses.
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Keywords
Guo Ruilin, Wu Qiufang, Liu Yafei, Liu Yanzhen, Mao Guangzhi and Wang Jinshun
The paper seeks to attempt to solve a decision‐making problem for breeding target character shown as an interval number.
Abstract
Purpose
The paper seeks to attempt to solve a decision‐making problem for breeding target character shown as an interval number.
Design/methodology/approach
A new comprehensive evaluation method is proposed based on similarity‐difference theory and interval number theory. Data from Winter Wheat Group I Variety Regional Test in Henan Province in 2009‐2010 were analysed using the proposed method.
Findings
The results showed that Zhou 99233 was a good variety; Yuxhan No. 7, An 05‐28, Xun K8, Jinyumai 378 and Zhoumai 18 were better ones; 08 luo 36,and Xuke 718 ordinary ones, and others worse ones. Based on this, the feasibility of the method was discussed. It showed that the proposed method had some obvious merits, such as simple arithmetic, convenient operation, flexible and practical, fast and effective.
Practical implications
The application of a live example indicated that its evaluation effect was satisfactory.
Originality/value
The paper succeeds in solving a decision‐making problem for breeding target character shown as an interval number.
Details