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0 pointsScoundreller3y ago0 comments

More recently, beyond pH control, cities are doing orthophosphte corrosion control. Nearly universal in UK but hit and miss in other places.

https://www.haldimandcounty.ca/wp-content/uploads/2018/07/Or...

A big source of lead can be recently sweated copper lines (takes a while for the corrosion control to coat it), but lead solder isn’t supposed to be in potable use anymore. And old fixtures!

Even newer “lead-free” fixtures aren’t 0% lead.

https://www.epa.gov/sdwa/questions-and-answers-about-final-l...

0 comments

jaggederest3y ago

Yes I've found it's very frustrating looking for "genuinely zero lead" brass and bronze. Almost all scrap has lead in it to some degree, and even new metal often has a trace.

mildchalupa3y ago

Lead free brass is still 0.2% or less. Mitsubishi makes it. "Eco brass".

I'm not sure it's brass anymore without the lead.

Why does it seem that the better a material works the worse it is for humans.

TEP_Kim_Il_Sung3y ago

Remove about 82% of lead from bronze using this one weird trick!

https://www.researchgate.net/publication/250155103_Removal_o...

jaggederest3y ago

Neat, this dovetails with another interest of mine, pottery. NaF is "sodium feldspar" and Ca-Si compounds are "wollastonite" among others. Both useful as fluxes in metal casting, in addition to their pottery uses.

ScoundrellerOP3y ago

I was hoping for something involving a particle accelerator and making gold.

j / k navigate · click thread line to collapse

0 pointsScoundreller3y ago0 comments

More recently, beyond pH control, cities are doing orthophosphte corrosion control. Nearly universal in UK but hit and miss in other places.

https://www.haldimandcounty.ca/wp-content/uploads/2018/07/Or...

A big source of lead can be recently sweated copper lines (takes a while for the corrosion control to coat it), but lead solder isn’t supposed to be in potable use anymore. And old fixtures!

Even newer “lead-free” fixtures aren’t 0% lead.

https://www.epa.gov/sdwa/questions-and-answers-about-final-l...

0 comments

jaggederest3y ago

Yes I've found it's very frustrating looking for "genuinely zero lead" brass and bronze. Almost all scrap has lead in it to some degree, and even new metal often has a trace.

mildchalupa3y ago

Lead free brass is still 0.2% or less. Mitsubishi makes it. "Eco brass".

I'm not sure it's brass anymore without the lead.

Why does it seem that the better a material works the worse it is for humans.

TEP_Kim_Il_Sung3y ago

Remove about 82% of lead from bronze using this one weird trick!

https://www.researchgate.net/publication/250155103_Removal_o...

jaggederest3y ago

ScoundrellerOP3y ago

I was hoping for something involving a particle accelerator and making gold.

j / k navigate · click thread line to collapse