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C. Guillén, A. Morales and J. Herrero, “Performance of sol-gel SiO2 Coatings onto Glass/SnO2 Superstrates,” Surface and Coating Technology, Vol. 132, No. 1, 2000, pp. 31-35. doi.org/10.1016/S0257-8972(00)00727-1

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• TITLE: Foundry Coating Technology: A Review

  AUTHORS: U. C Nwaogu, N. S Tiedje

  KEYWORDS: Coating, Refractory Materials, Application Methods, Characterization, Sol-Gel Technology

  JOURNAL NAME: Materials Sciences and Applications, Vol.2 No.8, August 26, 2011

  ABSTRACT: The importance of foundry coating in improving the surface quality of castings cannot be over emphasized. The application of mould and core washes creates a high thermal integrity barrier between the metal and the mould resulting in the reduction of the thermal shock experienced by the sand system. These thermal shock leads to series of surface defects such as veining/finning, metal penetration, burn-on/in, scab, rat tail, erosion etc. The use of coatings reduces the tendency of occurrence of these defects. However, the understanding of the coating, its components, characteristics and mechanism of action is important. In this review, a detailed description of these topics and examples are provided where necessary. A potential area of research in foundry coating development, using sol-gel process is suggested. The application of sol-gel technology in the development of foundry coatings is a novel approach.