Tuesday, March 18, 2008 - 9:30 AM
Convention Center, Second Level, R08 (Ernest N. Morial Convention Center)
08364

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

Ivan Rogan, CorteCros Co Ltd; Irina Pucic and Milko Jaksic, Ruder Boskovic Institute; Tadija Madzar, MORH

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

Irina Pucić1*, Tadija Madžar2, Milko Jakšić1, and Ivan Rogan3

1Ruđer Bošković Institute, Zagreb, Croatia

2 Military of Defese, Republic of Croatia, Zagreb, Croatia

3 Cortecros Co. Ltd. Zagreb, Croatia

Abstract

           Anti-corrosion polymer films used for 0 to 6 years were investigated to determine the type

and content of volatile corrosion inhibitors (VCI) and how long the films emit VCI to protect the metal surface encased by the film. By 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 implying that corrosion inhibitor was molybdate based. The films were divided into three groups according to different rate of the VCI concentration decrease with increasing age. The division of films into groups and diffusion of VCI was confirmed by significant decrease of molybdenum content determined by PIXE spectroscopy after accelerated aging in vacuum at 50°C. It was concluded that films with initial concentration of molybdenum 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 the ambient conditions.

Keywords. IR spectroscopy; DSC; Diffusion; Molybdate; LDPE.


See more of Advances, Novel Applications and Measurement of Vapor Corrosion Inhibitors
See more of Technical Symposium

See more of The CORROSION 2008 Conference and Expo (March 16-20, 2008)