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Strafford and Datta [1], and Datta and Du et al [2] have comprehensively reviewed the process of sulphidation.
Consideration of Some Previous Experimental Results Literature reveals beneficial effects of Cr [6] and Al [7] in inhibiting sulphidation attack.
Recognising the presence of a finite amount of pO2, both Cr and Al and preferably in combination are considered essential elements to be present in sulphidation resistant materials.
Recent further studies on a series of CoCr-Al-Y-X alloys containing refractory metals, at various levels and different combinations, under similar conditions of environment and temperature have demonstrated much improved resistance to sulphidation.
The results from these studies have also allowed the development of a model for the degradation due to HT sulphidation as given by Du and Datta el al [10,11].

Similar results were found with respect to phenol conducted by Liu et al [9].
[2] Momania F A., Smith D W., El-Din M G: Journal of Hazardous Materials Vol.150 (2008), p.238-249
W., et al: Chemical Engineering Vol.129 (2007), p. 153-159
Umebayashi, et al: Appl.
Al-Shahry,W.B.

Experimental Hydrotalcites containing chromate (CrO42) in the interlayer and with Al together with different divalent cations (Mg, Zn) in the brucite-like layers were synthesized following the ion exchange preparation method.
The precursors used for the exchange processes were the corresponding chloride-LDHs which had been prepared in the following way: given amounts of MCl2 · 6H2O (M=Mg, Zn) and AlCl3 · 6H2O corresponding to a M2+/Al 3+ molar ratio of 2 were dissolved in 200 mL of CO2-free water and then added dropwise to 100 mL of water (previously decarbonated).
Element chemical analysis for Mg, Zn, Al and Cr were carried out in Servicio General de Análisis Químico (University of Salamanca, Spain) by atomic absorption in a Mark 2 ELL-240 instrument after dissolving the samples in nitric acid.
The FT-IR spectra of the MgAlCr and ZnAlCr samples shows in addition to the hydroxyl groups and water characteristic bands (3445-3462 cm-1 (υOH), 1630 cm-1 (δHOH)), other ones corresponding to Mg/Al-OH translation modes (bands at 390, 448, 555, and 620 cm-1) or Zn/Al-OH translation modes (324, 427, 552 and 620 cm-1) [15].
El Maki, A.

The researchers experimented with different calcination steps, Davidovits et al [13] calcined the clay at 500,650,700 and 750 °C, Palomo et al [14] explored a temperature range of 600-700 °C, Zhang and Sun- Wei [15] at 700 °C, whereas Zibouche et al [8] preferred to treat it at 800 °C.
The paste samples were prepared with NaOH solution 8M in quantity allowing to have a ratio Na/Al close to 1(1:1).
Guessasma , et al : Powder Technol. 271 (2015) 228
El-maghraby: Characterization of low-purity clays for geopo-lymer binder formulation , International Journal of Minerals, Metallurgy and Materials ,21(6) (2014) 609
El-Korchi, M.

This type of reactions was carried out and reported by Zhang et. al. [13].
From: Zhang et. al., Chem.
From: Rivera et. al., J.
Vol 5, No. 2, 153-167 (1997) And Rivera-Muñoz et. al.
From: Zhang et. al., Chem.

Espert et al [7] were mentioned regarding 3 mechanisms of moisture penetration into composites materials.
Wang et al [9] used percolation theory to get better understanding on moisture absorption mechanism of in natural fiber reinforced composites.
Eligon et al [10] have mentioned that in wood, adsorption and desorption of moisture under constant temperature exhibit hysteresis.
In this situation, water penetration by the means of capillary and micro crack mechanism is minimal as mention by Espert at el [7].
Prasad et al., Plenum Press, New York, 1998 [2] F.

Misra, et al.
Sahu, et al.
Zhang, et al.
Weber, et al.
Yun, et al.

Sinha et al. studied the use of chitosan as carrier for various classes of drugs such as antihypertensive agents, anticancer agents, proteins, peptide drugs, and vaccines [3].
Shirosaki et al. previously prepared chitosan-3-glycidoxypropyltrimethoxysilane (GPTMS) hybrids and pointed put that they exhibited better cytocompatibility than chitosan membrane [4].
Moreover, Davis et al. described that epoxy groups and silanol groups formed Si-O-C bond, and the peaks detected at 60 ppm [7].
Akbugal et al
[8], or Bodmeier et al. [9] reported that the release of the drug from the microspheres decreases with increase in drug content in the microspheres.

Improved Analysis of Nonlinear Vibrations in Orthotropic Laminated Composite Beams Using Homogenization Techniques VOWOGBE Kossi Hubert1,a*and MERRIMI El Bekkaye1,b 1Mohammed V University in Rabat, ENSAM - Rabat, M2SM, B.P.6207, Rabat Instituts, Rabat, Morocco akossihubert_vowogbe@um5.ac.ma, belbekkaye.merrimi@ensam.um5.ac.ma Keywords: Composite materials; Homogenization; Nonlinear dynamics; Vibration analysis; Euler-Bernoulli beam theory.
DOI: https://doi.org/10.4028/www.scientific.net/AMR.683.779 [12] Zhang YW, Hou S, Zhang Z, Zang J, Ni ZY, Teng YY, et al.

Composition of Aluminium modified with 5% of Fe2O3, 5% of Al2O3 & 5 of % Mn Si Fe Cu Mn Mg Zn Ti Ni Al Al+ Fe2O3 0.090 0.096 0.0025 0.0095 0.0058 0.0017 0.0062 0.0033 99.6 Al+ Mn 0.158 0.120 0.0081 0.0281 0.0149 0.00229 0.0128 0.0135 99.3 Al+ Al2O3 0.109 0.103 0.0054 0.0038 0.0048 0.0010 0.006 0.0026 99.6 Density analysis The modification in the density of the samples were determined by using weighing scale and a beaker with water.
Density of the aluminium samples Sample Density (g/cm3) CS 2.7 Al+ Fe2O3 2.75 Al+ Mn 2.77 Al+ Al2O3 2.73 Aluminium has a density of approximately 2.7 g/cm³, while alumina has a density of approximately 3.97 g/cm³.
Nino, Recycling of aluminium scrap for secondary Al-Si alloys. 
Abou El-Khair, and A.N.
Bai, Dry sliding wear of Al alloy 2024-Al203 particle metal matrix composites.