Modern Steel Analysis a Selection of Practical Methods for the Chemical Analysi
Modern Steel Analysis a Selection of Practical Methods for the Chemical Analysi
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Of the alloy is cautiously heated with 2 grm. Of bisulphate in a porcelain crucible. When fumes escape the crucible is removed from the mufEe and about 15 grm. More bisulphate are added in two lots, the whole being finally fused for at least a quarter of an hour at a very low red heat. The crucible is then removed, cooled, and boiled out with 20 per cent, sulphuric acid, and SILICON 77 the silica filtered off, washed, ignited, and weighed. A careful examination for unattacked particles should b...e made. If fusion with alkalies is employed, fuse 0. 5 grm. With 10 grm. Of the fusion mixture for about half an hour. Cool, dissolve the melt in water, acidify with sulphuric acid (1 : 3), and add about 20 c. C. Of concentrated acid in excess. Evaporate to fumes, cool, dilute, filter off, and weigh the silica.
Tungsten and Molybdenum. If these elements are present the alloy must be decomposed with aqua regia. The precipitate is invariably contaminated with tungstic or molybdic oxide. There are several satisfactory but troublesome ways of separating the tungstic oxide, of which may be mentioned heating to just below redness in a stream of air and chloroform vapour ; and reducing the two in hydrogen and then passing a current of chlorine at a low red heat.
What to read after Modern Steel Analysis a Selection of Practical Methods for the Chemical Analysi?
You can find similar books in the "Read Also" column, or choose other free books by J a Joseph Allen Pickard to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Of the alloy is cautiously heated with 2 grm. Of bisulphate in a porcelain crucible. When fumes escape the crucible is removed from the mufEe and about 15 grm. More bisulphate are added in two lots, the whole being finally fused for at least a quarter of an hour at a very low red heat. The crucible is then removed, cooled, and boiled out with 20 per cent, sulphuric acid, and SILICON 77 the silica filtered off, washed, ignited, and weighed. A careful examination for unattacked particles should b...e made. If fusion with alkalies is employed, fuse 0. 5 grm. With 10 grm. Of the fusion mixture for about half an hour. Cool, dissolve the melt in water, acidify with sulphuric acid (1 : 3), and add about 20 c. C. Of concentrated acid in excess. Evaporate to fumes, cool, dilute, filter off, and weigh the silica.
Tungsten and Molybdenum. If these elements are present the alloy must be decomposed with aqua regia. The precipitate is invariably contaminated with tungstic or molybdic oxide. There are several satisfactory but troublesome ways of separating the tungstic oxide, of which may be mentioned heating to just below redness in a stream of air and chloroform vapour ; and reducing the two in hydrogen and then passing a current of chlorine at a low red heat.
What to read after Modern Steel Analysis a Selection of Practical Methods for the Chemical Analysi?
You can find similar books in the "Read Also" column, or choose other free books by J a Joseph Allen Pickard to read onlineMoreLess
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