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4. Castings
Molded parts are not generally used in nuclear applications, but mainly for corrosion resistance applications in the chemical industry. Again, the high reactivity of liquid Zr represents the main difficulty: all refractory oxides, such as SiO 2 , Al 2 O 3 , MgO, BeO, are reduced, ZrO 2 is dissolved, graphite is acceptable but with superficial dissolution in the metal. The simplest method of sand casting can therefore not be used. Early castings were made with machined graphite molds lined with suitable poteyages. Today,...
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Castings
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Bibliography
Standardization
Most standards for zirconium and hafnium metal products, or alloys, are American ASTM standards. A few French standards also exist. Few standards concern hafnium.
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French standards
- Corrosion of metals and alloys – Aqueous corrosion testing of zirconium alloys used in nuclear reactors. - NF EN ISO 10270 - Juillet 2008
- Description and qualification...
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