Title:The Mechanism of Sulphide Film Growth on Copper in Anaerobic Sulphide Solutions Under Natural Corrosion Conditions
VOLUME: 8 ISSUE: 2
Author(s):J. Chen*, Z. Qin and D.W. Shoesmith
Affiliation:Department of Chemistry and Surface Science Western, Western University, London, ON, N6A 5B7, Department of Chemistry and Surface Science Western, Western University, London, ON, N6A 5B7, Department of Chemistry and Surface Science Western, Western University, London, ON, N6A 5B7
Keywords:Sulphide film, copper, corrosion, diffusion, crystal growth, microscopy.
Abstract:Background and Method: The growth mechanism of sulphide films formed on copper in
anaerobic 0.1 M NaCl + 5 x 10-4 M Na2S solution has been investigated under natural corrosion conditions
for exposure periods up to 1691 hours using scanning electron microscopy, focused ion beam
cross-sectioning, and a Au marker procedure.
Results and Conclusions: The film formed by a chemical deposition process via an outward growth
mechanism. This process was controlled by cuprous ion transport in the film combined with sulphide
diffusion in solution.
