Paper Information

Journal:   IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING   2016 , Volume 12 , Number 27; Page(s) 71 To 80.
 
Paper: 

THE PROCESS OF PREPARING AND EVALUATION OF SILICA-ALUMINA COMPOSITE COATING PROPERTIES WITH DIFFERENT PROPORTION

 
 
Author(s):  SHAFIEI M.*, KALANTAR M., GHASEMI S.S., MOSALLAEEPOUR M.
 
* DEPARTMENT OF MATERIALS ENGINEERING, UNIVERSITY OF YAZD
 
Abstract: 

Silica-alumina composite coatings have been applied on metals, alloys and special steels to increase the wear resistance, corrosion resistance, and resistance to oxidation. In this regard, silica-alumina ceramic coating by sol-gel method was applied on Carbon Steel. Alumina sol was prepared by using Aluminum-isopropoxide as a precursor and Silica sol was prepared by using Tetraehyl Orthosilicate as a precursor. Then the sols with the different weight ratios of SiO2: Al2O3 were mixed together and steel samples after polishing and degreasing were coated by dipping method. Microstructure and Phase analysis of coated samples evaluated by using scanning electron microscopy and X-ray diffraction techniques. Corrosion resistance and adhesion strength evaluated by using electrochemical testing and pull off method. The results show that with increasing silica content in the silica-alumina composite coatings corrosion resistance and adhesion strength of the coating to the substrate increases.

 
Keyword(s): STEEL‚ SOL-GEL‚ SILICA-ALUMINA COATING‚ CORROSION
 
References: 
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