| 铸铁中铬的快速测定方法 |
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| 引用本文： | 张进孝.铸铁中铬的快速测定方法[J].铸造技术,2002,23(5):292-293. |
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| 作者姓名： | 张进孝 |
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| 作者单位： | 长安大学,陕西,西安,710064 |
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| 摘 要： | 采用（NH4）2S2O8氧化，（NH4）2Fe(SO4)2还原测定铬，原理是：在试样溶解过程中，把铬变成3价铬，然后通过（NH4）2S2O8把3价铬氧化成6价，再以（H4）2Fe(SO4)2还原剂，将其还原3价，根据所消耗的还原剂（NH4）2Fe(SO4)2的量，来计算铬量。
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| 关 键 词： | 铸铁 铬 测定 |
| 文章编号： | 1000-8365(2002)05-0292-02 |
| 修稿时间： | 2002年1月31日 |
Rapid Speed Testing Method About Chromium in Chromium Cast Iron |
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| ZHANG Jinxiao.Rapid Speed Testing Method About Chromium in Chromium Cast Iron[J].Foundry Technology,2002,23(5):292-293. |
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| Authors: | ZHANG Jinxiao |
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| Abstract: | Chromium is tested with oxidized (NH 4) 2S 2O 8 and reduced (NH 4) 2Fe(SO 4) 2 . Theory:Chromium is changed into Cr 3+ during solution, then it can be oxidized to C 6+ with (NH 4) 2S 2O 8, and reduced into Cr 3+ with (NH 4) 2Fe(SO 4) 2. According to the quantity of (NH 4) 2Fe(SO 4) 2, the number of chromium is determined. |
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| Keywords: | Cast iron Chromium Testing method |
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