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lizhijiang0602

金虫 (正式写手)

[求助] 氢氧化钠溶液对不锈钢的腐蚀 已有1人参与

工艺条件:60%的NaOH溶液,反应温度:60-65℃
不锈钢反应釜材质:304或316L
请问该工艺条件对反应釜的腐蚀性如何?防止或者减轻腐蚀的方法有哪些?要求回答专业、具体。谢绝百度搜索、复制的结果,谢谢!
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lizhijiang0602

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没人知道?自己顶一个。
来点实在的!
2楼2016-05-31 15:27:39
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nanjiangshui

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怎么样传图?
3楼2016-06-01 10:37:16
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nanjiangshui

金虫 (小有名气)

【答案】应助回帖

★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
lizhijiang0602: 金币+100, ★★★很有帮助, 如果有完整文献就更好了,不过还是很感谢! 2016-06-05 14:03:23
All stainless steels resist general corrosion by all concentrations of caustic soda
up to about 65C (150F). Other authorities give higher temperature limits for, for
example, 50% caustic, but these are probably influenced by other factors, such as
the presence of impurities in the caustic. Types 304 and 316 show low corrosion rates
in boiling caustic at concentrations up to nearly 20%. Type 316 has a better resistance
to pitting than type 304 in caustic solutions, especially if chlorides are present. The
low-carbon grades perform marginally better than the high-carbon grades because
of their resistance to sensitization. This means that 316L is a good choice for caustic
solutions as long as operating conditions are such that caustic SCC is not a problem.6
SCC of 304 and 316 grades occurs at around 100C (212F). An isocorrosion curve
in mpy for these grades is shown in Figure 13.6.40 This figure also shows the temperature
and concentration region where caustic SCC of these steels is likely.

你的65度在一个极限位置,你最好选316L

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4楼2016-06-01 10:43:55
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lizhijiang0602

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送红花一朵
引用回帖:
4楼: Originally posted by nanjiangshui at 2016-06-01 10:43:55
All stainless steels resist general corrosion by all concentrations of caustic soda
up to about 65C (150F). Other authorities give higher temperature limits for, for
example, 50% caustic, but the ...

非常感谢回复,先谢再看,请问有文章的出处吗?上传图片应该在高级回复里,可以上传附件。
来点实在的!
5楼2016-06-01 16:37:55
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qwertyzasd

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引用回帖:
4楼: Originally posted by nanjiangshui at 2016-06-01 10:43:55
All stainless steels resist general corrosion by all concentrations of caustic soda
up to about 65C (150F). Other authorities give higher temperature limits for, for
example, 50% caustic, but the ...

你好能不能给我发一下这个的原文

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6楼2019-08-14 13:58:09
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