Still tubes conditioning problem.

[GotHydro?]

I am trying to condition SS 316L tubes but it doesn't work.
Using PWM from Dave L. @2 amps 2 hours on and 2 hours off for 2 days.
Started with distilled water and someone told me to use tap water.
I used drinking water not to be too rough and when it failed again I went
straight for tap water. Each step up produced more brown scum so I think
the claim I saw on forums that not 100% SS wires for connections between
tubes or SS tubes/plates are causing the brown scum might not be right. I think some chemical reaction causing the tap water impurities to turn in to brown, microscope/chemical test might tell more. Correct me if I am wrong.
Anyway I can't get these tubes oxidized even a bit and the tap water here is quiet saturated by calcium as I can see dry spots on the sink turning white so my water should be fine.
SOS, SOS, SOS.

[Aaron]

brown scum

Hi, I noticed that any browns scum I had were really from non-stainless connector connecting the wires to the tubes and not from the stainless tubes themselves. I just used t304 stainless. Not sure if that is where your brown scum is coming from though.

[ashtweth]

low amp conditioning is best. Ravi used .2 amps
Are your tubes annealed?

[GotHydro?]

All my connections and wiring are made by SS bolts and wires and by going to dirtier water the scum showed more and more, with distilled water I got only a bit of brown. I have to find and look at the paperwork I got with
these SS tubes. I just remember that they are SS seamless 316L grade. In case they not annealed can it be done additionally at home?

[Chevronb19]

Actually, I haven't heard you can anneal Stainless steel. I am a welder who uses it every day at work. Pipework especially.
Excessive heating of stainless steel makes it go fairly brittle when cooled, in my experience.
It has weird properties under stress.

If you drill it to fast, it work hardens and blunts the drill.
It distorts/contracts with only a very small weld. It's expansion/contraction properties are not far off that of aluminium. when welded.

AND, when heating, it would best be done under an inert gas shield.