Effect of Dextrin content in alcohol-based Zircon coating for sand mold applications

Authors

  • Muhammad Umar Manzoor Institute of Metallurgy & Materials Engineering, Faculty of Chemical & Materials Engineering, University of the Punjab, Lahore 54590, Pakistan
  • Muhammad Zahid Yousuf Institute of Metallurgy & Materials Engineering, Faculty of Chemical & Materials Engineering, University of the Punjab, Lahore 54590, Pakistan
  • Asma Salman Institute of Metallurgy & Materials Engineering, Faculty of Chemical & Materials Engineering, University of the Punjab, Lahore 54590, Pakistan

DOI:

https://doi.org/10.54693/piche.05316

Abstract

Three alcohol-based zircon coating compositions were developed using a variation of dextrin binder for high-temperature steel castings in silica sand molds. The average particle size of zircon sand used in formulating the coatings was measured as 40 microns. The coatings were characterized by using Fourier Transform Infrared Spectroscopy (FTIR), thermal stability testing, surface roughness and permeability measurement. The results demonstrated that increasing the dextrin content principally improved the mold and casting surface finish. There was a significant improvement in an average surface roughness reduction of the mold and by 25% of the casting. The permeability number of the sand mold with coating was reduced by more than 20% of that of the sand mold without coating, which greatly influenced in enhancing the mold-metal interface protection and reducing the casting surface defects. The thermal stability of the coating was observed from 200oC to 1600oC and no cracks and delamination were observed. The findings highlight the potential of dextrin as an effective binder in zircon coatings, optimizing performance for steel casting applications.

Published

2025-10-13

How to Cite

Manzoor, M. U., Yousuf, M. Z., & Salman, A. (2025). Effect of Dextrin content in alcohol-based Zircon coating for sand mold applications. Journal of the Pakistan Institute of Chemical Engineers, 53(1). https://doi.org/10.54693/piche.05316

Issue

Vol. 53 No. 1 (2025): Journal of the Pakistan Institute of Chemical Engineers

Section

Articles

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