On the corrosion resistance of duplex stainless steel

2016-05-16View Original

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I would like to ask: Can the 2507 and 2205 duplex stainless steels withstand salt and acid?

Reply #22016-05-17

What is the temperature? Over time, corrosion will occur.

Reply #32016-05-17

In saline acids, it is recommended to use chemical equipment made of graphite, such as graphite heat exchangers, graphite reactors, graphite falling film absorbers, graphite distillation columns, graphite concentrators, graphite synthesis furnaces, etc. Chemical equipment made of graphite can be used for a long time under boiling conditions at any concentration of saline acids without experiencing any corrosion.

Reply #42016-05-17

Then, if it’s a valve, what material should the valve be made of?

Reply #52016-05-17

Use PP below 80 degrees, and steel-lined PTFE above 80 degrees.

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On the corrosion resistance of duplex stainless steel

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