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Copper Tube Pitting in Santa Fe Municipal Water Caused by Microbial Induced Corrosion.
Burleigh, Thomas D; Gierke, Casey G; Fredj, Narjes; Boston, Penelope J.
Afiliação
  • Burleigh TD; Materials & Metallurgical Engineering Department, New Mexico Tech, Socorro, NM 87801, USA. burleigh@nmt.edu.
  • Gierke CG; Earth & Environmental Sciences, New Mexico Tech, Socorro, NM 87801, USA. caseygierke@gmail.com.
  • Fredj N; Materials & Metallurgical Engineering Department, New Mexico Tech, Socorro, NM 87801, USA. nfredj@nmt.edu.
  • Boston PJ; Earth & Environmental Sciences, New Mexico Tech, Socorro, NM 87801, USA. pboston@nmt.edu.
Materials (Basel) ; 7(6): 4321-4334, 2014 Jun 05.
Article em En | MEDLINE | ID: mdl-28788679
ABSTRACT
Many copper water lines for municipal drinking water in Santa Fe, New Mexico USA, have developed pinhole leaks. The pitting matches the description of Type I pitting of copper, which has historically been attributed to water chemistry and to contaminants on the copper tubing surface. However, more recent studies attribute copper pitting to microbial induced corrosion (MIC). In order to test for microbes, the copper tubing was fixed in hexamethyldisilazane (HMDS), then the tops of the corrosion mounds were broken open, and the interior of the corrosion pits were examined with scanning electron microscopy (SEM). The analysis found that microbes resembling actinobacteria were deep inside the pits and wedged between the crystallographic planes of the corroded copper grains. The presence of actinobacteria confirms the possibility that the cause of this pitting corrosion was MIC. This observation provides better understanding and new methods for preventing the pitting of copper tubing in municipal water.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2014 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2014 Tipo de documento: Article