plating, anodizing, & finishing Q&As since 1989
What's construction material resist to Sodium Hydroxide (caustic soda) ?
I need advise for best common Stainless Steel or special alloy to make welded autoclave (100 L)that resist to Sodium Hydroxide (caustic soda high %) at 190°C. Any advise welcome.
- RANTIGNY, OISE, FRANCE
Technically, you could use ordinary steel. However for maintenance reasons, better use any type of stainless steel.
- Bertem, Belgium
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.
Consultant - Poulsbo, Washington
(Don is co-author of "Plating on Plastics" [affil link to the book on: Amazon or AbeBooks ])
March 5, 2012
Is rubber lined steel tank suitable for caustic lye (NaOH) solution?
M G RAJAN
- Visakhapatnam, India