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Effects of Chloride Contamination on Coatings Performance

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The Kentucky Transportation Center (KTC) conducted a study funded by the Kentucky Transportation Cabinet (KYTC) to assess the impact of chlorides on bridge coatings performance. 

Product Number: 41212-686-SG
Author: Bobby W. Meade, Sudhir Palle, Theodore Hopwood II
Publication Date: 2012
Industries: Coatings , Corrosion Monitoring and Control
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$20.00

The Kentucky Transportation Center (KTC) conducted a study funded by the Kentucky Transportation Cabinet (KYTC) to assess the impact of chlorides on bridge coatings performance. The study included field measurements of chloride levels and associated coating performance of bridges. It also included laboratory accelerated weathering/corrosion performance of a variety of bridge coatings applied on steel panels charged with various concentrations of calcium chloride. Rusted steel panels were also subjected to abrasive blasting including some that were pressure washed. The cleaned panels were used for scanning electron microscopy (SEM) to analyze the disposition of chlorides not removed by the abrasive blasting process. The SEM tests revealed that abrasive blasting resulted in chloride-charged pits throughout the treated steel substrates. On other portions of the steel surface the chloride levels were low. 

The Kentucky Transportation Center (KTC) conducted a study funded by the Kentucky Transportation Cabinet (KYTC) to assess the impact of chlorides on bridge coatings performance. The study included field measurements of chloride levels and associated coating performance of bridges. It also included laboratory accelerated weathering/corrosion performance of a variety of bridge coatings applied on steel panels charged with various concentrations of calcium chloride. Rusted steel panels were also subjected to abrasive blasting including some that were pressure washed. The cleaned panels were used for scanning electron microscopy (SEM) to analyze the disposition of chlorides not removed by the abrasive blasting process. The SEM tests revealed that abrasive blasting resulted in chloride-charged pits throughout the treated steel substrates. On other portions of the steel surface the chloride levels were low. 

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