Journal article 1160 views 340 downloads
Smart-release inhibition of corrosion driven organic coating failure on zinc by cationic benzotriazole based pigments
C.A.J. Richards,
H.N. McMurray,
G. Williams,
Geraint Williams 
,
Hamilton McMurray
,
Hamilton McMurray
Corrosion Science
Swansea University Authors:
Geraint Williams , Hamilton McMurray
-
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DOI (Published version): 10.1016/j.corsci.2019.04.005
Abstract
A novel cationic benzotriazole pigment (CBP) based on the benzotriazolium cation (BTAH2+) exchanged into a sulfonated organic resin has been synthesized and evaluated as a means of inhibiting the corrosion-driven cathodic disbondment of organic coatings from the surface of galvanized steel. The CBP...
| Published in: | Corrosion Science |
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| ISSN: | 0010-938X |
| Published: |
2019
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa49933 |
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| Abstract: |
A novel cationic benzotriazole pigment (CBP) based on the benzotriazolium cation (BTAH2+) exchanged into a sulfonated organic resin has been synthesized and evaluated as a means of inhibiting the corrosion-driven cathodic disbondment of organic coatings from the surface of galvanized steel. The CBP is acidic in nature (BTAH2+ pKa ≈ 1.1) and is intended to be compatible with acidic coating formulations such as etch-primers. Delamination rates, as measured using a scanning Kelvin probe (SKP), were found to decrease monotonically with increasing CBP volume fraction (ΦCBP) and to approach zero when ΦCBP = 0.1. The mechanism of CBP operation is described. |
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| Keywords: |
benzotriazole, corrosion, inhibition, zinc, galvanized steel |
| College: |
Faculty of Science and Engineering |