A platform for research: civil engineering, architecture and urbanism
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Comparison of guarded and unguarded linear polarization CCD devices with weight loss measurements
Two types of linear polarization devices may be used to measure the corrosion current density (CCD) to assess the degree of active corrosion in concrete structures. The devices, with and without a guard electrode, provide significantly different CCD values for the same conditions. The 5-year study reported herein presents a comparison of the two devices over a range of CCD values from passive to highly active corrosion conditions for outdoor exposure slabs. The results demonstrate that both devices are able to qualitatively rank the instantaneous corrosion conditions in structures. The guarded electrode device measurements were less quantitatively precise than the unguarded electrode device. The guarded electrode device underestimated the amount of metal loss by a factor of 4-6. The unguarded electrode device overestimate the metal loss by a factor of about 1.5 when compared to weight loss measurements and adjusted for concrete temperature and resistance.
Comparison of guarded and unguarded linear polarization CCD devices with weight loss measurements
Two types of linear polarization devices may be used to measure the corrosion current density (CCD) to assess the degree of active corrosion in concrete structures. The devices, with and without a guard electrode, provide significantly different CCD values for the same conditions. The 5-year study reported herein presents a comparison of the two devices over a range of CCD values from passive to highly active corrosion conditions for outdoor exposure slabs. The results demonstrate that both devices are able to qualitatively rank the instantaneous corrosion conditions in structures. The guarded electrode device measurements were less quantitatively precise than the unguarded electrode device. The guarded electrode device underestimated the amount of metal loss by a factor of 4-6. The unguarded electrode device overestimate the metal loss by a factor of about 1.5 when compared to weight loss measurements and adjusted for concrete temperature and resistance.
Comparison of guarded and unguarded linear polarization CCD devices with weight loss measurements
Liu, Youping (author) / Weyers, R.E. (author)
Cement and Concrete Research ; 33 ; 1093-1101
2003
9 Seiten, 18 Quellen
Article (Journal)
English
Comparison of guarded and unguarded linear polarization CCD devices with weight loss measurements
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Comparison of guarded and unguarded linear polarization CCD devices with weight loss measurements
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