Abstract
The selection of containment materials for the decomposition of sulphuric acid, by direct heating with air (CRISTINA process) was made by using information from the literature or by experimental investigation. Commercial materials having a reasonable corrosion resistance were identified for each process step and an allowance for the effect of corrosion was made in the design of the plant built at the JRC-Ispra (CHRIS plant). After dismantling of the CHRIS plant, the materials used were examined visually and by the use of metallographic and X-ray diffraction techniques. The results of this exercise are critically reviewed with the aim of facilitating the choice of materials for a pilot plant.
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