OK, how corrosive is this stuff?
OK, how corrosive is this stuff?
(OP)
We're looking to handle some sludge cake from a water treatment plant. The specification makes a specific reference to Chloride Concentration, and quotes it as
Average 486 mg/l
Maximum 2000 mg/l
I have to hold my hand up and say I've no idea what is really means. How corrosive is this? We can fabricate contact parts from mild steel, 1.4003 (3CR12) corrosion resistant steel, 304 or 316 stainless steels.
Any advice would be appreciated.
Average 486 mg/l
Maximum 2000 mg/l
I have to hold my hand up and say I've no idea what is really means. How corrosive is this? We can fabricate contact parts from mild steel, 1.4003 (3CR12) corrosion resistant steel, 304 or 316 stainless steels.
Any advice would be appreciated.





RE: OK, how corrosive is this stuff?
RE: OK, how corrosive is this stuff?
Thanks for the prompt response, we'll go with 1.4003 (which is what we've used before).
RE: OK, how corrosive is this stuff?
RE: OK, how corrosive is this stuff?
RE: OK, how corrosive is this stuff?
regarding the Stainless Steel, usually 304 is used for Cl conc up to approx 200-500 ppm while 316 for conc up to 1000 ppm.
Stainless Steel properties
Vitt
Corrosion & Rust Prevention Control
RE: OK, how corrosive is this stuff?
There isn't really any free water in the sludge cake, as to whether any water in the cake is oxygenated, who knows.
RE: OK, how corrosive is this stuff?
RE: OK, how corrosive is this stuff?
Look at duplex stainless grades, 2003 or 2205 would be good options.
What is going to happen is you sludge is not going to be real dry. Then you will have a high chloride mud stuck to the surface. It is crevice corrosion under this mud that you need to be concerned about.
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