[TheForge] where do I get?

[Kathy]

Pete,
You need to consult a safety supplies dealer about what kind of cartridge to use
in the respirator, for the fumes you are going to be exposed to.

Various types of SS are not going to be different enough to promote galvanic
deterioration--in pond water. You would need an extreme environment, such as
water so acidic that it would not support plant life, to make a sufficiently
effective electrolyte to cause galvanic corrosion due to different SS types.
Pure water--containing no minerals whatsoever--flowing through SS piping is also
capable of rapidly destroying it by stripping away molecular materials (aided by
electric current), but pond water hardly qualifies :-)

  

-----Original Message-----

Jim...will a respirator take the hexavalent chromium out?

A second question for the knowledgeable folks here...
I'm assembling a semi submerged water intake for my system out of 
assorted scrap stainless. It's pretty clear that there are 
several, quite different alloys going into the assembly...hard, 
softer, magnetic and non magnetic.
What are the corrosion consequences of the mixed stainless? 
(Stainlesses?)

The prior intake ( the frog coffin) was enameled steel, galv 
steel, brass and copper. It lasted about 15 years. The steel 
parts are crumbling...1" galv schedule 40 pipe is perforated...
A fine demonstration of the drawbacks of mixed metal assemblys.
pete f