Experimental Set-up for Corrosion Study of Nitriding Surface Heat Treatment on MgAZ91D Magnesium Alloy
M. Faizairi M. Nor, Suhaimi Hassan, M. Azman Zakariya, Faizal A. Fadzil, M. A. Aiman Azmi M. Zulkifli Mohd Rosli, Jariah Mohammad Juoi
Abstract: MgAZ91D is an alloy which has high general strength, low density and high formability. Therefore, magnesium alloy, MgAZ91D is widely being used mainly in the aerospace, automotive and telecommunication industries. The main disadvantage of MgAZ91D is its low resistance towards corrosion attack. Therefore, this research objective is on improving the corrosion-resistant of magnesium alloy, MgAZ91D. Nitriding process surface heat treatment on the MgAZ91D substrate by subjecting the metal alloy with 95% nitrogen and 5% hydrogen gas environment in a heating chamber. The variables are time of exposure and temperature of the surface heat treatments. The nitrided samples will undergo immersion corrosion test to analyse the corrosion-resistant of the specimens. Further analysis on the microstructure formation, case depth and corrosion resistance correlation based on the test matrix. The experimental-setup will determine the correct procedure and conclude the impact of surface heat treatment towards the corrosion-resistant of MgAZ91D and improvement of the alloy.
[ FULL TEXT PDF 1-7 ] DOI: 10.22587/rjss.2019.12.1.1
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Microcredit Impact in Northern Africa Countries: A Case Study Analysis
Nicola Boccella, Irene Salerno
Abstract: Background: This paper has the objective to study the impact of microcredit projects in North-Africa, from two points of view: - The gender perspective, with focus of the impact of microfinance projects in women’s empowerment - The sectorial perspective, with focus on specific economic and productive sectors, among which the fishing. Objective: the paper is devoted to evaluate, through some case studies, the economic and the social impact of microcredit analyzing how this tool can help improving the social status of women in third countries of the world, with the aim of identifying some patterns to a profitable exploitation of the potential offered by this microfinance instrument. Results: Analysis of the impact of microcredit projects to empower women and people employed in the fishing sector. Conclusion: Microcredit is confirmed to be still a useful tool to promote the empowerment of small communities and to favor the growth of small businesses. The analysis carried out in this paper on particular geographical contexts (North Africa) and sectorial (fishing sector), shows that microcredit, although with considerable limitations - including the objective difficulty to estimate its real impact in fighting against poverty in the medium and long term-, can still be considered as a useful tool, to respond to the critical issues that most affect people belonging to such areas.
[ FULL TEXT PDF 8-13 ] DOI: 10.22587/rjss.2019.12.1.2
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