Need some help selecting the proper stainless for pool application
Need some help selecting the proper stainless for pool application
(OP)
Short story, my pool is a salt-system pool. The pool water contains about 5000ppm of NaCl and the system passes current through a cell to produce Cl. After about 5 years the cell has failed, I am trying to fab up my own replacement. For first attempt I used 316L stainless, this lasted about 5-6 hours before becoming totally pitted and the hardware also stainless(bolts/nuts) failed as well. See pics. The pool is now a green/orange color. Obviously 316L is not he proper choice for the cell replacement material, I could use some suggestions please! :)





RE: Need some help selecting the proper stainless for pool application
RE: Need some help selecting the proper stainless for pool application
Ti is the easy option. The other possibility is to use a super-ferritic alloy like SEA-CURE for tubing and then use a 6% Mo super-austenitic (like AL-6XN) for the hardware.
What size is the tube? I might have something laying around ;)
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Plymouth Tube
RE: Need some help selecting the proper stainless for pool application
RE: Need some help selecting the proper stainless for pool application
you said that Cl is produced in the cell (Cl2?), Cl2 is a strong oxidant and this can also increase the corrosion.
you can also consider a superduplex stainless stell (2507) which works well in water but at low-medium temperature
S
Corrosion Prevention & Corrosion Control
RE: Need some help selecting the proper stainless for pool application
RE: Need some help selecting the proper stainless for pool application
Sorry that I don't have anything larger.
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Plymouth Tube
RE: Need some help selecting the proper stainless for pool application
RE: Need some help selecting the proper stainless for pool application
ed
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Plymouth Tube