Effect of alloying elements on oxidation of low-chromium alloys
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Effect of alloying elements on oxidation of low-chromium alloys

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      "The Bureau of Mines is conducting research to determine the high- temperature oxidation resistance of substitute stainless steels (ss) containing two less strategic elements, al and si, instead of cr. Chromium is considered to be a critical and strategic metal. Although the cr content was reduced to 8 wt pct, the alloys showed better oxidation resistance than did 304 ss containing 18 wt pct cr. Specifically, the alloys that contained fe-8cr-16ni with combinations of al and si showed excellent oxidation resistance even at temperatures up to 1,000 deg. C. In this study, the effects of the alloying elements on oxidation kinetics and morphology of oxides were investigated using a cahn rg electrobalance, scanning electron microscopy, an energy-dispersive x-ray analyzer, x-ray diffraction, and an electron microprobe. Aluminum and silicon additions in combination were more effective in providing oxidation resistance than either element was alone." - NIOSHTIC-2 NIOSHTIC no. 10005451
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