발간논문

Home > KJMM 논문 > 발간논문

Vol.18, No.4, 296 ~ 303, 1980
Title
On the Improvement of Sulfidation Resistance of Nickel - Base Superalloys
최주 Ju Choi , 이종근 Chong Keun Lee , 최종술
Abstract
For the improvement of sulfidation resistance, several experimental nickel-base superalloys were newly designed by utilizing computer. The corrosion test was carried out using molten salt of 75%Na₂SO₄+25%NaCl at 900℃. Oxide scales of experimental alloys being examined by EPMA and electron diffraction were shown to consist of Cr₂O₃, TiO₂ at the outer side and Al₂O₃ at the innermost which was tightly adherent to the matrix. It is, therefore, proposed that the superior sulfidation resistance of experimental alloys is attributed to the excellent adherent oxide layers. The relationship between corrosion depth and alloying elements was obtained by means of multiple regression analysis. This led to a conclusion that Ti, Al and Cr improve greatly hot corrosion resistance whereas Co and W influence little it.
Key Words
| PDF
대한금속∙재료학회 (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 FAX : 02-557-1080 E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.