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Evaluation and Prediction of Protective Performance for Epoxy Systems and Epoxy/Polyurethane Systems in Wet and Dry Environments

Evaluation and Prediction of Protective Performance for Epoxy Systems and Epoxy/Polyurethane Systems in Wet and Dry Environments
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Current coating practice requires the thickness of anti-corrosion organic coatings to be over 250 for immersion parts of ships and offshore structures and the protective performance of these coatings has been evaluated by destructive and qualitative analysis. Recently, Electrochemical Impedance Spectroscopy (EIS) method has been employed, as an alternative, to evaluate corrosion resistance of organic coatings. This method is characterized as being nondestructive, reproducible, and quantitative in evaluating aging of organic coatings. 

Product Number: 41206-258-SG
Author: Chul-Hwan Lee, Chil-Seok Shin, Kwang-Ki Baek
Publication Date: 2006
Industry: Coatings
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$20.00
$20.00

Current coating practice requires the thickness of anti-corrosion organic coatings to be over 250 for immersion parts of ships and offshore structures and the protective performance of these coatings has been evaluated by destructive and qualitative analysis. Recently, Electrochemical Impedance Spectroscopy (EIS) method has been employed, as an alternative, to evaluate corrosion resistance of organic coatings. This method is characterized as being nondestructive, reproducible, and quantitative in evaluating aging of organic coatings. In this investigation, EIS method was adopted to quantitatively and effectively select the coating systems having optimized protective performance. The evaluation of several epoxy and epoxy/polyurethane coating systems which are typically used for ships and offshore structures was carried out in wet (50, 90) and dry(room temp.) environments to accelerate the degradation of the organic coatings. These results were compared with the conventional scribed test results. The plausible prediction model for determining the remaining lifetime of coating systems was also proposed based on variations of impedance data, FT-IR and Tg measurements results.

Current coating practice requires the thickness of anti-corrosion organic coatings to be over 250 for immersion parts of ships and offshore structures and the protective performance of these coatings has been evaluated by destructive and qualitative analysis. Recently, Electrochemical Impedance Spectroscopy (EIS) method has been employed, as an alternative, to evaluate corrosion resistance of organic coatings. This method is characterized as being nondestructive, reproducible, and quantitative in evaluating aging of organic coatings. In this investigation, EIS method was adopted to quantitatively and effectively select the coating systems having optimized protective performance. The evaluation of several epoxy and epoxy/polyurethane coating systems which are typically used for ships and offshore structures was carried out in wet (50, 90) and dry(room temp.) environments to accelerate the degradation of the organic coatings. These results were compared with the conventional scribed test results. The plausible prediction model for determining the remaining lifetime of coating systems was also proposed based on variations of impedance data, FT-IR and Tg measurements results.

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Effects of Blasting Methods on the Performance of Organic Coatings
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Effects of Blasting Methods on the Performance of Organic Coatings

Product Number: 41206-267-SG
Author: Andreas W. Momber
Publication Date: 2006
$20.00

The effects of three blasting methods utilised for surface preparation upon the behavior of five organic coating systems are investigated. The blasting methods include dry blast cleaning, UHP and UHPAB. It is shown that pull-off strength, pull-off failure mode, and delamination are significantly affected by the surface preparation method. 
Evaluating Hull Coatings for Precise Impact on Vessel Performance
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Evaluating Hull Coatings for Precise Impact on Vessel Performance

Product Number: 41206-269-SG
Author: Torben Munk
Publication Date: 2006
$20.00

Focusing on the invention of new measurement methods in order to analyze hull coating efficiency more precisely is one approach. However, it is possible to treat performance data from in-situ observations carried out at specified intervals onboard any vessel (over 10,000 dwt) by means of a data collection protocol. 
New Developments for Two Component Urethane Primers
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New Developments for Two Component Urethane Primers

Product Number: 41206-225-SG
Author: Rafael E. Camargo, Katie L. Skok
Publication Date: 2006
$20.00

A new family of low viscosity MDI-based isocyanates has been developed for use in two component compositions for primer and protective coating applications. This new family of products shows excellent adhesion to a variety of substrates including concrete surfaces and wood. The products can be effectively applied on wet surfaces and compared to earlier products, have extended pot lifetimes. 
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