EPA Science Inventory

Nanoscale Surface Characterization of Aqueous Copper Corrosion: Effects of Immersion Interval and Orthophosphate Concentration

Citation:

Daniels, S. L., P. T. Sprunger, O. Kizilkaya, D. A. Lytle, AND J. C. Garno. Nanoscale Surface Characterization of Aqueous Copper Corrosion: Effects of Immersion Interval and Orthophosphate Concentration. Applied Surface Science. Elsevier B.V., Amsterdam, Netherlands, 285(B):823-831, (2013).

Description:

Morphology changes for copper surfaces exposed to different water parameters were investigated at the nanoscale with atomic force microscopy (AFM), as influenced by changes in pH and the levels of orthophosphate ions. Synthetic water samples were designed to mimic physiological chemistries for drinking water, both with and without addition of orthophosphate over a pH range of 6.5 to 9. Copper surfaces treated with orthophosphate as a corrosion inhibitor after 6 and 24 h were evaluated. Tapping mode AFM images revealed dosing of the water with 6 mg/L of orthophosphate was beneficial in retarding the growth of copper by-products. The chemical composition and oxidation state of the surface deposits were characterized with x-ray diffraction (XRD), near edge x-ray absorption fine structure (NEXAFS) spectroscopy and Fourier transform infrared spectroscopy (FTIR).

Purpose/Objective:

To inform the public on changes to copper surfaces when exposed to water.

URLs/Downloads:

http://dx.doi.org/10.1016/j.apsusc.2013.08.136   Exit

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Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Start Date: 11/15/2013
Completion Date: 11/15/2013
Record Last Revised: 02/25/2014
Record Created: 02/10/2014
Record Released: 02/10/2014
OMB Category: Other
Record ID: 268474

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

WATER SUPPLY AND WATER RESOURCES DIVISION