Can you suggest a suitable material of construction for sodium hypochlorite manufacturing? The minimum requirement is better heat transfer and less corrosion.
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Brian Dalder Forum Moderator 169 Posts
Re: Material suitable for sodium hypochlorite10 May 2007 at 1:29pmSodium hypochlorite is usually made by reacting chlorine with a sodium hydroxide solution. So there are plenty of "bad actors" from a corrosion perspective. According to C.P. Dillon in the book Materials Selection for the Chemical Process Industries, corrosion resistant pipe such as nickel alloys, titanium or fluorinated plastic can be used to add liquid or gaseous chlorine into sodium hydroxide in titanium tanks. Titanium or fluoro-polymer-lined pumps, valves and piping have been used. Cooling coils should be titanium or Hastelloy C276. A good source for materials of construction information for chlorine and sodium hypochlorite is the Chlorine Institute Inc. The Chlorine Institute Inc. is a technical trade association of companies that are involved in the safe production, distribution and use of chlorine, sodium and potassium hydroxides and sodium hypochlorite, and the distribution and use of hydrogen chloride.