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http://dx.doi.org/10.7777/jkfs.2014.34.2.060

The Effect of Blasting Treatment on the Corrosion Characteristics in the Zr-based Amorphous Alloy Die Castings  

Lee, Byung-Chul (Performance Material Korea Co. Ltd.)
Kim, Sung-Gyoo (Department of Materials System Engineering, Pukyung National University)
Park, Bong-Gyu (Department of Materials System Engineering, Pukyung National University)
Bae, Cha-Hurn (Modern Casting and Metals. Co., Ltd.)
Park, Heung-Il (Department of Materials System Engineering, Pukyung National University)
Publication Information
Journal of Korea Foundry Society / v.34, no.2, 2014 , pp. 60-66 More about this Journal
Abstract
A Zr-based amorphous alloy specimen was produced by vacuum die casting process. The salt spray test was carried out using the specimens in the as-cast, $Al_2O_3$ and $ZrO_2$ particle blasted state. Using these specimens, the SEM-EDX and XRD analyses, DSC measurement and bending strength test were conducted. After the salt spray test, the specimens were not experienced phase change and thermal characteristics of the alloys were remained unchanged. In the as-cast specimen, corrosion products were not observed. However, in the $Al_2O_3$ particle blasted specimen, pitting corrosion occurred and the detected corrosion products were $ZrCl_2$ and $NaZrO_3$. Due to the salt spray test, bending strength of the $Al_2O_3$ blasted specimens showed about 100 MPa lower strength than the other specimens. The bending fracture surface was vein pattern which was shown typically in the amorphous alloys.
Keywords
Zr-based amorphous alloy; Diecasting; Blasting; Salt spray test; 3-point bending test;
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