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What's construction material resist to Sodium Hydroxide (caustic soda) ?

2003

Hi all,

I need advise for best common Stainless Steel or special alloy to make welded autoclave (100 L)that resist to Sodium Hydroxide (caustic soda ⇦liquid caustic soda in bulk on Amazon [affil link] high %) at 190°C. Any advise welcome.

Thank you,

Patrice TANG
- RANTIGNY, OISE, FRANCE

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Technically, you could use ordinary steel. However for maintenance reasons, better use any type of stainless steel.

Best Regards,

Piessens Peter
- Bertem, Belgium
2003

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Nickel containing stainless steel such as 316. Chrome stainless steels have less corrosion resistance to strong alkali. Chrome contamination of the sodium hydroxide may occur. Mild steel is often used, however there will be some iron contamination of the sodium hydroxide. Mild steel is electroless nickel plated- low phosphorus or electrolytic nickel plated, for exposure to sodium hydroxide where iron contamination is a problem.

Don Baudrand
Consultant - Poulsbo, Washington
(Don is co-author of "Plating on Plastics"
           and "Plating ABS Plastics" eBay or AbeBooks affil links])
2003

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Is rubber lined steel tank suitable for caustic lye (NaOH) solution?

M G RAJAN

Menon Rajan
- Visakhapatnam, India
March 5, 2012

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