IMPROVEMENTS IN AND RELATING TO OXIDATION RESISTANT ARTICLES
A method is given for treating carbon and graphite articles to increase their oxidation resistance at 500 to 950 deg C. The method consists of forming a protective coating of molten zinc phosphate on the articles, and such coating may be accomplished by impregnating or incorporating into the articles a mixture of (NH/sub 4/)/sub 2/HPO/sub 4/, ZnCl/sub 2/, and H/sub 3/BO/sub 3/ in a weight ratio from 4: 1: 0 to 2:2: 0.25. The mixture may be in the form of a 1.5% HCl aqueous solution, in which case the preferred weight ratio is 3: 1: 0.25. After the mixture is incorporated into the articles, the articles are heated to form the protective coating. Oxidation data are presented for a variety of treated carbon and graphite samples at 500 to 725 deg C. (D.L.C.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-016033
- OSTI ID:
- 4028644
- Report Number(s):
- GB 865320
- Country of Publication:
- United Kingdom
- Language:
- English
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