ELECTRODE POTENTIAL AND CORROSION BEHAVIOR OF SOME BORIDES OF MOLYBDENUM AND ZIRCONIUM
Journal Article
·
· Planseeber. Pulvermet.
OSTI ID:4001597
The corrosion of the compound MoB in a 0.1N KCl solution was slight but increased with time and was determined by the weight loss and formation of boric acid in solution. The corrosion process was related to the electrolytic decomposition of the compound MoB, probably brought about by local cell currents between anodic and cathodic areas consisting of MoB and residual boron. The boron in the compound is anodically oxidized as indicated by the formation of boric acid. The molybdenum, originally bonded to the boron, remains on the surface of the specimen and is converted to a low oxide. The thickness of the oxidic molybdenum layer increases with time, a process which is affiliated with a progressive decrease of the corrosion rate, which is higher on the low temperatare alpha modification of MoB than on the high temperature beta modification. As compared with the corrosion of the molybdenum boride, that of the borides of zirconium is of a very low order of magnitude. It is speculated that the potentials of ZrB/sub 2/ in 0.1N KCl solution are predominately determined by the zirconium, those of ZrB/sub 1//sub 2/ by the boron in the compound. In the light of the results obtained in this study, it appears entirely justified to consider the interstitial compounds of molybdenum or zirconium with boron as intermetallic compounds. (auth)
- Research Organization:
- American Electro Metal Corp., Yonkers, N.Y.
- NSA Number:
- NSA-15-019789
- OSTI ID:
- 4001597
- Journal Information:
- Planseeber. Pulvermet., Journal Name: Planseeber. Pulvermet. Vol. Vol: 9
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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