In depth analysis of the passive film on martensitic tool alloy : Effect of tempering temperature

Summary, in English

Effect of tempering temperature on the composition of the passive film of a martensitic tool alloy was studied by synchrotron-based hard/soft X-ray photoelectron spectroscopy and electrochemical analyses. The contents of Cr and Mo in the passive film are affected by precipitation of tempering carbides. Increase of tempering temperature from 200 to 525°C leads to enhanced formation of Cr/Mo-rich tempering carbides and Cr depletion. Tempering at 525°C results in a Cr content < 11 at% in the underlying metallic layer and formation of a Cr-deficient defective passive film, and thus loss of passivity for the tool alloy in corrosive conditions.

• Author: Xiaoqi Yue; Dihao Chen; Anantha Krishnan; Magnus Tidesten; Alfred Larsson; Haijie Tong; Andrei Gloskovskii; Christoph Schlueter; Mattia Scardamaglia; Andrey Shavorskiy; Jinshan Pan
• Department/s: LU Profile Area: Light and Materials; LTH Profile Area: Nanoscience and Semiconductor Technology; Synchrotron Radiation Research; NanoLund: Centre for Nanoscience; MAX IV Laboratory
• Publishing year: 2024-07-01
• Language: English
• Publication/Series: Corrosion Science
• Volume: 234
• Links: http://dx.doi.org/10.1016/j.corsci.2024.112133
• Document type: Journal article
• Publisher: Elsevier
• Topic: Condensed Matter Physics (including Material Physics, Nano Physics)
• Keywords: Carbide; Martensitic tooling alloy; Passive film; Synchrotron-based hard/soft XPS
• Status: Published
• ISBN/ISSN/Other: ISSN: 0010-938X