| Autor: |
Gary S. Was, N. R. Sorensen, J. D. Demaree |
| Rok vydání: |
1991 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :757-761 |
| ISSN: |
0168-583X |
| DOI: |
10.1016/0168-583x(91)95697-c |
| Popis: |
An experimental program has been conducted to determine the effect of phosphorus on the corrosion and passivation behavior of Fe-Cr-P alloys. Chemically homogeneous 60 nm films of Fe-lOCr-xP (x from 0 to 35 at.%) were prepared by multilayer evaporation followed by ion beam mixing with Kr + ions. Films with a phosphorus content of at least 25 at.!% were found to be entirely amorphous, while films with 15 at.% P consisted of both ~o~hous and bee phases. Rec~stallization of the amorphous phase was accomplished by heating the samples to 450°C in a purified argon flow furnace. Electrochemical polarization tests in an acid solution have shown the Fe-IOCr-xP films to be more corrosion resistant than Fe-lOCr, with the corrosion resistance increasing with the amount of P present. The corrosion resistance is not significantly affected when the amorphous films are recrystallized, indicating that the behavior is chemically controlled and not a result of the amorphous structure. When examined by XPS, the phosphorus appears to enhance passivation by encouraging Cr enrichment in the oxide and by incorporating in the oxide as phosphate. 1. In~~uction |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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