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Open access

G.L. Di Muoio and N.S. Tiedje

References [1] Schutze, N. (2011). Control Limits for the Drying of Water Based Coatings, Foseco, Foundry Practice, Issue 255, June. [2] Jamrozowicz, L., Zych, J. & Snopkiewicz, T. (2013). The Research of Desiccation Rates Selected Protective Coating Used on Mould and Sand Cores. Archive of Foundry Engineering, Vol.13, 01, 45-50. [3] Jakubski, J., Dobosz, S. & Jelinek, P. (2005). The influence of the protective coating type on thermal deformation of casting cores. Archives of Foundry, Volume 5, № 15

Open access

Miroslav Fér, Martin Leue, Radka Kodešová, Horst H. Gerke and Ruth H. Ellerbrock

.H., Bachman, J., Goebel, M.O., 2005. Composition of organic matter fractions for explaining wettability of three forest soils. Soil Science Society of America Journal, 69, 57–66. Ellerbrock, E.H., Gerke, H.H., Böhm, Ch., 2009. In situ DRIFT characterization of organic matter composition on soil structural surfaces. Soil Science Society of America Journal, 73, 531–540. Fér, M., Kodešová, R., 2012. Estimating hydraulic conductivities of the soil aggregates and their clay-organic coatings using numerical inversion of capillary rise data. Journal of Hydrology, 468

Open access

M. Holtzer, A. Bobrowski, D. Drożyński and J. Mocek

Abstract

When cast steel castings are made in moulding sands on matrices of high-silica sand, which has a low fire resistance the problem of the so-called chemical penetration is distinctly visible. Whereas this effect appears to a small degree only when moulding sand matrices are of chromite, zircon or olivine sands. Therefore in case of making castings of high-manganese cast steel (e.g. Hadfield steel) sands not containing free silica should be applied (e.g. olivine sand) or in case of a high-silica matrix protective coatings for moulds and cores should be used. Two protective coatings, magnesite alcoholic (marked as coating 1 and coating 2) originated from different producers and intended for moulds for castings of the Hadfield steel, were selected for investigations. Examinations of the basic properties were performed for these coatings: viscosity, thermal analysis, sedimentation properties, wear resistance. In order to estimate the effectiveness of protective coatings the experimental castings were prepared. When applying coating 1, the surface quality of the casting was worse and traces of interaction between the casting material (cast steel) and the coating were seen. When protective coating 2 was used none interactions were seen and the surface quality was better.

Open access

M. Kot

REFERENCES [1] A. Erdemir, Tribology International 37 , 1005-1012 (2004). [2] M. Kot, W.A. Rakowski, Ł. Major, R. Major, J. Morgiel, Surface and Coatings Technology 202 , 3501-3506 (2008). [3] P. C. Yashar, W. D. Sproul, Vacuum 55 , 179-190 (1999). [4] M. Kot, Ł. Major, K. Chronowska-Przywara, J.M. Lackner, W. Waldhauser, W. Rakowski, Materials and Design 56 , 981-989 (2014). [5] A. Czyzniewski, Thin Solid Films 433 , 180-185 (2003). [6] M. Kot, Ł. Major, J. Lackner, W. Rakowski, Journal of Balkan Tribological Association

Open access

Piotr Homa, Beata Tryba and Andżelika Gęsikiewicz-Puchalska

building materials: From fundamentals to applications. Build. Environ. 44, 1899-1906. DOI: 10.1016/j.buildenv.2009.01.002. 7. Auvinen, J. & Wirtanen, L. (2008). The infl uence of photocatalytic interior paints on indoor air quality. Atmos. Environ. 42, 4101-4112. DOI: 10.1016/j.atmosenv.2008.01.031. 8. Allen, N., Edge, M., Sandoval, G., Verran, J., Stratton, J. & Maltby, J. (2005). Photocatalytic Coatings for Environmental Applications. Photochem. Photobiol. 81, 279-290. DOI: 10.1562/2004-07-01-ra-221.1. 9. Salthammer, T

Open access

S. Mohamed, A. Abdeltawab and M. Shoeib

Abstract

Hydroxyapatite (HA) coatings were developed on titanium by electrophoretic deposition at various deposition potentials from 30 to 60 V and at a constant deposition time of 5 minutes using the synthetic HA (Ca10(PO4)6(OH)2,) powder in a suspension of dimethyleformamide (DMF, HCON(CH3)2). The electrochemical corrosion behavior of the HA coatings in simulated body fluid (SBF Hanks’ solution) at 37 °C and pH 7.4 was investigated by means of open-circuit potential (OCP) measurement and potentiodynamic polarization tests. The OCP test showed that the values OCP for the coated samples shifted to more noble potential than for uncoated titanium, especially after addition of dispersants. The polarization test revealed that all HA coated specimens had a corrosion resistance higher than that of the substrate, especially after addition of dispersants such as polyvinyl butyral (PVB), polyethylene glycol (PEG) and triethanolamine (TEA) to the suspension. The coating morphology after polarization, characterized by scanning electron microscopy (SEM), showed penetration of electrolyte into the HA coats. Bone bioactivity of the coatings was also studied by immersion of coated specimens in Hanks’ solution for 3 and 7 days. Apatite granules growth on the surface of the HA layers was observed.

Open access

N. Kaźnica and J. Zych

–44 (2013). [7] A. Kochmańska, J. Kubicki, Arch. Foundry Eng. 9 (2), 129-132 (2009). [8] A. Baliński, (2013). Protective coatings and splitted used for molds and cores, in: J. Sobczak (Eds.), Odlewnictwo współczesne. Poradnik Odlewnika, Wydawnictwo Stowarzyszenia Technicznego Odlewników Polskich 2013 [9] J. Zych, Int. J. Metalcast. 3 (2), 17 – 24 (2009). [10] N. Kaźnica, J. Zych, Arch. Foundry Eng. 15 (3), 29 – 32 (2015).

Open access

L.P.T. Quoc, D.P. Hoa, H.T.B. Ngoc and T.T.Y. Phi

REFERENCES Ali A., Maqbool M., Alderson P.G., Zahid N., 2013 - Effect of gum arabic as an edible coating on antioxidant capacity of tomato ( Solanum lycopersicum L.) fruit during storage. Postharvest Biology and Technology, 76: 119-124. Alves R.E., Chitarra A.B., Chitarra M. I. F., 1995 - Postharvest Physiology of Acerola ( Malpighia emarginata DC.) Fruits: Maturation changes, Respiratory activity and Refrigerated storage at ambient and modified atmospheres. Acta Hortic., International Symposium on Tropical Fruits, 370: 223-229. Chen S

Open access

Zouhaier Romdhani, Ayda Baffoun, Mohamed Hamdaoui and Sadok Roudesli

Abstract

This paper presents an experimental study of impact of water drop on a surface in a spreading regime with no splashing. Three surfaces were studied: virgin glass, coating film and woven cotton fabric at different construction parameters. All experiments were carried out using water drop with the same free fall high. Digidrop with high-resolution camera is used to measure the different parameters characterising this phenomenon. Results show an important effect of the height of the free fall on the drop profile and the spreading behaviour. An important drop deformation at the surface impact was observed. Then, fabric construction as the weft count deeply affects the drop impact. For plain weave, an increase of weft count causes a decrease in penetration and increase in the spreading rate. The same result was obtained for coated fabric. Therefore, the impact energy was modified and the drop shape was affected, which directly influenced the spreading rate.

Open access

B.-R. Koo, J.-W. Bae and H.-J. Ahn

Abstract

We fabricated double-laminated antimony tin oxide/Ag nanowire electrodes by spin-coating and electrospraying. Compared to pure Ag nanowire electrodes and single-laminated antimony tin oxide/Ag nanowire electrodes, the double-laminated antimony tin oxide/Ag nanowire electrodes had superior transparent conducting electrode performances with sheet resistance ~19.8 Ω/□ and optical transmittance ~81.9%; this was due to uniform distribution of the connected Ag nanowires because of double lamination of the metallic Ag nanowires without Ag aggregation despite subsequent microwave heating at 250°C. They also exhibited excellent and superior long-term chemical and thermal stabilities and adhesion to substrate because double-laminated antimony tin oxide thin films act as the protective layers between Ag nanowires, blocking Ag atoms penetration.