pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (34권2호 60-66)
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
Byung-chul Lee, Sung-gyoo Kim*, Bong-gyu Park*, Cha-hurn Bae** and Heung-il Park*†
Performance Material Korea Co. Ltd., *Pukyung National University, **Modern Casting and Metals. Co., Ltd
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, Al2O3 and ZrO2 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, 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 Al2O3 particle blasted specimen, pitting corrosion occurred and the detected corrosion products were ZrCl2 and NaZrO3. Due to the salt spray test, bending strength of the Al2O3 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.
Zr-based amorphous alloy, Diecasting, Blasting, Salt spray test, 3-point bending test
PDF