Some Unique Aspects of Fouling on Copper as Compared to Titanium or Nickel
Abstract
Auger Electron Spectroscopy (AES) and X-ray Photoelectron Spectroscopy (XPS) are utilized to aid in gathering information on the nature of the molecular layer that is adsorbed to artificial surfaces immersed in seawater, and its role in subsequent bacterial adhesion. We have found by means of AES that the composition of molecular films absorbed on titanium is consistent with that of carbohydrates. On copper the adsorption results in high concentrations of nitrogen, suggesting a chemical reaction of the copper surface with the adsorbed nitrogen-containing organic material. XPS studies revealed chemical shifts of the characteristic is electron binding energy of nitrogen on copper as compared to nitrogen on titanium, thereby providing further evidence of the chemical reaction and indicating that the nitrogen is in reduced form. Quantitative analysis by means of XPS yields an elemental analysis of the molecular layer that is consistent with an organometallic copper complex with coordination number of four. Originator furnished keywords include: Marine, Fouling, Biofouling, Conditioning layer, Corrosion.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1985
- Accession Number
- ADA150072
Entities
People
- David W Taylor
- J. A. Cardamone
- M. E. Schrader