Impact Factor:7.4
DOI number:10.1016/j.corsci.2019.108137
Affiliation of Author(s):中国科学院金属研究所
Teaching and Research Group:0
Journal:Corrosion Science
Place of Publication:英国
Funded by:中国科学院重点研究计划
Key Words:A. Austenitic weld metal; B. SEM; B. XRD; C. High temperature corrosion; C. Oxidation
Abstract:The isothermal oxidation behaviors of the Fe-25Cr-20Ni-χNb (0–1.6 wt.%) weld metals have been investigated in air at 1100 °C. Results showed that niobium has a detrimental effect on the elevated temperature oxidation resistance of the chromia-forming weld metals. In the Nb content range studied, the Nb content of 1.6 wt.% showed the most deleterious effect on the chromia layer. Niobium promoted the chromium depletion underneath the oxide/matrix interface by impeding the chromium diffusion, which ruined the compactness of the chromia layer. The oxidation of niobium at the oxide layer/metal interface can further cause severe damage to the chromia layer, resulting in catastrophic oxide spallation.
Note:0
Indexed by:研究论文
Document Code:108137
Discipline:Engineering
Volume:159
Translation or Not:no
Date of Publication:2019-01-01