Monitoring the corrosion process of Al alloys through pH induced fluorescence

A sensing and monitoring set-up based on electrochemical pH induced fluorescence to systematically control the electrochemical corrosion process has been developed for possible applications in the field of localized corrosion. The sensing and monitoring concept is based on exposing the corroding met...

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Bibliographic Details
Published in:Smart materials and structures 2008-02, Vol.17 (1), p.015001-015001 (6)
Main Authors: Pidaparti, R M, Neblett, E B, Miller, S A, Alvarez, J C
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Industrial metrology. Testing
Mechanical engineering. Machine design
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Summary:A sensing and monitoring set-up based on electrochemical pH induced fluorescence to systematically control the electrochemical corrosion process has been developed for possible applications in the field of localized corrosion. The sensing and monitoring concept is based on exposing the corroding metal surface to solutions that contain selected redox chemicals which will react in local regions where anodic or cathodic polarizations occur. Redox couples that produce or consume protons in their electrochemical reactions were used so that local pH gradients can indicate electrochemical activity by inducing fluorescence in dyes. This approach has been applied to study the corrosion initiation in aircraft aluminum metal 2024-T3 in a controlled electrochemical cell. Preliminary results obtained suggest that monitoring of localized corrosion based on pH can be achieved for field applications.
ISSN:0964-1726
1361-665X
DOI:10.1088/0964-1726/17/01/015001