| 摘要 |
Pores and joints in refractory materials, such as carbon, in contact with liquid metals, are sealed by introducing thereinto a finely divided substance which reacts therein with the liquid metal to form a compound or alloy which is solid at the temperature of the liquid metal. Iron, titanium, cobalt or chromium may be used to proof against liquid aluminium; iron against liquid zinc; calcium or sulphur against liquid lead, and iron or manganese against liquid tin. These may be applied either as the elements per se or as compounds which break down under the influence of heat or chemical action to liberate the elements, and may be applied in suspension or in solution. |
