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08364 PIXE Spectroscopy for the Determination of Volatile Corrosion Inhibitor Concentration in Anticorrosion Polymer Films

Picture for 08364 PIXE Spectroscopy for the Determination of Volatile Corrosion Inhibitor Concentration in Antic
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Product Number: 51300-08364-SG
ISBN: 08364 2008 CP
Author: Ivan Rogan, Irina Pucic, Tadija Madzar, and Milko Jaksic
Publication Date: 2008
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Anti-corrosion polymer films used from 0 to 6 years were investigated to determine the type and content of volatile corrosion inhibitors (VCI) and how long the films emit them to protect the metal surface encased in the film. Using FTIR and DSC low density polyethylene (LDPE) was identified as the polymer carrier. Particle induced X-ray emission (PIXE) spectroscopy of anti-corrosion polymer films revealed significant concentration of molybdenum (Mo) implying that corrosion inhibitor composition was molybdate based. The films were divided into three groups according to different rates of VCI concentration decreasing with increasing age. The division of films into groups and diffusion of VCI was confirmed by significant decrease of Mo content determined by PIXE spectroscopy after accelerated aging in vacuum at 50 º C. It was concluded that films with initial concentration of Mo above 6000 ppm emit VCI for at least 6 years while the films with less than 4000 ppm of molybdenum do not emit the VCI in ambient conditions.
Anti-corrosion polymer films used from 0 to 6 years were investigated to determine the type and content of volatile corrosion inhibitors (VCI) and how long the films emit them to protect the metal surface encased in the film. Using FTIR and DSC low density polyethylene (LDPE) was identified as the polymer carrier. Particle induced X-ray emission (PIXE) spectroscopy of anti-corrosion polymer films revealed significant concentration of molybdenum (Mo) implying that corrosion inhibitor composition was molybdate based. The films were divided into three groups according to different rates of VCI concentration decreasing with increasing age. The division of films into groups and diffusion of VCI was confirmed by significant decrease of Mo content determined by PIXE spectroscopy after accelerated aging in vacuum at 50 º C. It was concluded that films with initial concentration of Mo above 6000 ppm emit VCI for at least 6 years while the films with less than 4000 ppm of molybdenum do not emit the VCI in ambient conditions.
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