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자료유형
학술저널
저자정보
저널정보
한국표면공학회 한국표면공학회지 한국표면공학회지 제38권 제6호
발행연도
2005.12
수록면
227 - 233 (7page)

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Electrochemical characteristics of welded stainless steels containing Ti have been studied by using the electrochemical techniques in 0.5 M H₂SO₄ + 0.01 M KSCN solutions at 25℃. Stainless steels with 12 ㎜ thickness containing 0.2-0.9 wt% Ti were fabricated with vacuum melting and following rolling process. The stainless steels were solutionized for 1 hr at 1050℃ and welded by MIG method. Samples were individually prepared with welded zone, heat affected zone, and matrix for intergranular corrosion and pitting test. Optical microscope, XRD and SEM are used for analysing microstructure, surface and corrosion morphology of the stainless steels. The welded zone of the stainless steel with lower Ti content have shown dendrite structure mixed with γ and δ phase. The Cr-carbides were precipitated at twin and grain boundary in heat affected zone of the steel and also the matrix had the typical solutionized structure. The result of electrochemical measurements showed that the corrosion potential of welded stainless steel were increased with higher Ti content. On the other hand, reactivation(I<SUB>r</SUB>), passivation and active current(I<SUB>a</SUB>) density were decreased with higher Ti content. In the case of lower Ti content, the corrosion attack of welded stainless steel was remarkably occurred along intergranular boundary and γ/δ phase boundary in heat affected zone.

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Abstract
1. 서론
2. 실험방법
3. 결과 및 고찰
4. 결론
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