Editing Galvanization (section)

==Galvanized piping==
{{See also|Galvanic corrosion|Pipe (fluid conveyance)|Piping}} 
In the early 20th century, galvanized piping swiftly took the place of previously used [[Cast iron pipe|cast iron]] and [[Pipe (fluid conveyance)#Materials|lead]] in [[Tap water|cold-water]] [[plumbing]]. Galvanized piping rusts from the inside out, building up layers of plaque on the inside of the piping, causing both water pressure problems and eventual pipe failure. These plaques can flake off, leading to visible impurities in water and a slight metallic taste. The life expectancy of galvanized piping is about 40–50 years,<ref>{{Cite web|last=Biard & Crockett|date=2016-05-16|title=How Long Will My Galvanized Pipes Last?|url=https://www.bcpsi.com/galvanized-pipes/|access-date=2021-02-06|website=Biard & Crockett}}</ref> but it may vary on how well the pipes were built and installed. Pipe longevity also depends on the thickness of zinc in the original galvanizing, which ranges on a scale from G01 to G360.<ref>{{Cite web|last=American Galvanizers Association|date=|title=Zinc Coatings|url=http://courtgalvanizinginc.com/wp-content/uploads/2012/04/Zinc_Coatings.pdf|archive-url=|archive-date=|access-date=|website=courtgalvanizinginc.com}}</ref>