In-situ spectroelectrochemical studies of the removal of chlorides from copper

This paper describes corrosion potential measurements of corroded copper samples taken whilst acquiring timeresolvedX-ray diffraction or X-ray absorption data in a synchrotron beam line. The surface structure of the samplesand its evolution, whilst under simulated conservation treatment in sodium sesquicarbonate, were examinedusing X-ray diffraction. The fluid chemistry over the sample was monitored during identical experiments usingX-ray absorption. All measurements were carried out with the sample immersed (i.e. without the need to exposethe sample to air). Processes were followed from initial wetting of the surfaces through to the cessation of measurablechange. A webcam was used to make a simultaneous visual record of the sample and its environment. Theexperiments aim at contributing to the improvement of conservation methods for cupreous artefacts recoveredfrom marine environments.This paper describes corrosion potential measurements of corroded copper samples taken whilst acquiring timeresolvedX-ray diffraction or X-ray absorption data in a synchrotron beam line. The surface structure of the samplesand its evolution, whilst under simulated conservation treatment in sodium sesquicarbonate, were examinedusing X-ray diffraction. The fluid chemistry over the sample was monitored during identical experiments usingX-ray absorption. All measurements were carried out with the sample immersed (i.e. without the need to exposethe sample to air). Processes were followed from initial wetting of the surfaces through to the cessation of measurablechange. A webcam was used to make a simultaneous visual record of the sample and its environment. Theexperiments aim at contributing to the improvement of conservation methods for cupreous artefacts recoveredfrom marine environments.C