Physicochemical Properties of Silicon Cast Iron

Abstract

The article presents results of pitting corrosion studies of selected silicon cast irons. The range of studies included low, medium and high silicon cast iron. The amount of alloying addition (Si) in examined cast irons was between 5 to 25 %. Experimental melts of silicon cast irons [1-3] were conducted in Department of Foundry of Silesian University of Technology in Gliwice and pitting corrosion resistance tests were performed in Faculty of Biomedical Engineering in Department of Biomaterials and Medical Devices Engineering of Silesian University of Technology in Zabrze. In tests of corrosion resistance the potentiostat VoltaLab PGP201 was used. Results obtained in those research complement the knowledge about the corrosion resistance of iron alloys with carbon containing Si alloying addition above 17 % [4-6]. Obtained results were supplemented with metallographic examinations using scanning electron microscopy. The analysis of chemical composition for cast irons using Leco spectrometer was done and the content of alloying element (silicon) was also determined using the gravimetric method in the laboratory of the Institute of Welding in Gliwice. The compounds of microstructure were identify by X-ray diffraction.

Optimizing the Gating System for Steel Castings

“…In [15], the use of the wear resistant Fe-C-Cr alloys have been proposed instead of some steel castings. The article [16] shows the method of cheap ductile iron production on the base of steel scrap, while the authors of [17,18] presented the high-silicon cast iron and SiMo iron capabilities and advantages. The authors of [19][20][21] thoroughly described the outstanding properties of the CGI iron while comparing it with the Ductile Iron (DI).…”

Bifilm Inclusions in High Alloyed Cast Iron

“…In the next step, the material prepared this way was used in the proper melt. Double melting was conducted to eliminate gas dissolved in the liquid alloy, which is recommended in the literature [ 14 , 15 ]. During the initial melting, samples for carbon content analysis were collected.…”

Selected Phenomena of the In-Mold Nodularization Process of Cast Iron That Influence the Quality of Cast Machine Parts

“…Pitting corrosion might also occur in this case, which constitutes a danger to the proper and safe operation of machinery and equipment. A view of the pitting defect [8], which is the result of accelerated tests on ductile iron, is presented below in Figure 10. …”