Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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The Effect of Blasting Treatment on the Corrosion Characteristics in the Zr-based Amorphous Alloy Die Castings

Zr기 비정질 합금 다이캐스팅 주조품의 부식 특성에 미치는 블라스팅 처리의 영향

  • 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)
  • 이병철 ((주)퍼포먼스머티리얼코리아) ;
  • 김성규 (부경대학교 신소재시스템공학과) ;
  • 박봉규 (부경대학교 신소재시스템공학과) ;
  • 배차헌 ((주)엠씨엠) ;
  • 박흥일 (부경대학교 신소재시스템공학과)
  • Received : 2014.01.07
  • Accepted : 2014.04.25
  • Published : 2014.04.30
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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

References

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