Caustic Soda Storage Tank Material

The viscosity of 50 caustic soda solution increases rapidly when its temperature falls below 65 f 16 c.

Caustic soda storage tank material.

Sodium hydroxide polypropylene tanks. This will contain iron sodium carbonate and when mercury rayon grade is stored mercury. Stainless steel and other alloys can also be used. Oxychem does not use mercury based electrolytic cells to produce caustic soda.

The caustic soda solution is inventoried in storage tanks prior to shipment. Caustic soda sodium hydroxide or naoh is most commonly manufactured by the electrolysis of a sodium chloride nacl solution. Fiberglass tanks and the storage of caustic soda november 19 2013 in blog liquid caustic soda is corrosive. To be representative the sample must include material from every level of the tank car or tank truck.

Caustic soda sodium hydroxide solution 5 51 following prolonged storage in metal tanks a black sludge will collect at the bottom of the tank. Tanks of mild steel with internal external epoxy coatings have been used in cases where iron pick up is unacceptable. The product is shipped in tank trucks railcars barges and ships. Since impurities especially sodium carbonate tend to concentrate at the top or bottom of the container dipping caustic from the surface will not provide a representative sample.

The weight of 50 caustic soda solution is 1 5 times that of an equal volume of water. Recommendations are for storing caustic solutions in polyethylene storage tanks rated to 1 9 specific gravity and solution temperatures retained beneath 100 f. The caustic naoh solution will be stored in the tanks at 70 c and at 300 g l which are made out of mild steel as149. Test the atmosphere in the tank for oxygen and mercury vapour before entering.

Schedule 80 pvc or cpvc fittings epdm gaskets and stainless steel bolts are recommended sodium hydroxide storage tank component materials. What i am asking is whether caustic embrittlement and stress corrosion cracking will be a issue with the caustic at this temperature and concentration. Caustic soda solution is highly corrosive and can be hazardous to personnel. Home chemical storage sodium hydroxide defying a chemical that finds leaks.

Currently caustic soda is stored in fiberglass stainless steel carbon steel low carbon steel lined steel and plastic materials. Oxychem manufactures caustic soda using either membrane or diaphragm electrolytic cells.