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Nitrate accelerated corrosion of lead solder in potable water systems
Although nitrate is generally believed to have little effect on lead corrosion, bench-scale tests in this work revealed that increasing nitrate in the range of occurrence in potable water (0-10 mg/L N) can dramatically increase lead leaching from simulated soldered pipe joints. Lead in water created slightly increased galvanic currents between solder and copper pipe, but nitrate also altered the nature of the attack in a manner that caused solder particles to detach into the water. Chloramine decay and the associated conversion of ammonia to nitrate could create much higher lead contamination of potable water from solder in some cases.
Nitrate accelerated corrosion of lead solder in potable water systems
Although nitrate is generally believed to have little effect on lead corrosion, bench-scale tests in this work revealed that increasing nitrate in the range of occurrence in potable water (0-10 mg/L N) can dramatically increase lead leaching from simulated soldered pipe joints. Lead in water created slightly increased galvanic currents between solder and copper pipe, but nitrate also altered the nature of the attack in a manner that caused solder particles to detach into the water. Chloramine decay and the associated conversion of ammonia to nitrate could create much higher lead contamination of potable water from solder in some cases.
Nitrate accelerated corrosion of lead solder in potable water systems
Nitratbeschleunigte Korrosion von Bleiloten in Trinkwassersystemen
Nguyen, C.K. (author) / Stone, K.R. (author) / Edwards, M.A. (author)
Corrosion Science ; 53 ; 1044-1049
2011
6 Seiten, 7 Bilder, 4 Tabellen, 35 Quellen
Article (Journal)
English
Nitrate accelerated corrosion of lead solder in potable water systems
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