2 ms·
More recently, beyond pH control, cities are doing orthophosphte corrosion control. Nearly universal in UK but hit and miss in other places. https://www.haldim
by Scoundreller 4y ago
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/Orthophosphate-Info-Sheet.pdf 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-lead-free-rule https://www.epa.gov/sdwa/questions-and-answers-about-final-l...
- jaggederest 4y agoYes 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.
- TEP_Kim_Il_Sung 4y agoRemove about 82% of lead from bronze using this one weird trick! https://www.researchgate.net/publication/250155103_Removal_of_Lead_from_Scrap_Bronze https://www.researchgate.net/publication/250155103_Removal_o...
- jaggederest 4y agoNeat, 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.
- Scoundreller 4y agoI was hoping for something involving a particle accelerator and making gold.
- mildchalupa 4y agoLead 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.