Amine blush is a surface defect that needs to be avoided in epoxy coatings. This can impact the coating performance, resulting in white hazy spots, discolouration over a period of time, poor substrate adhesion and inter-coat adhesion. In this blog, we explore how to prevent amine blush in epoxy coatings for optimal coating performance.
What is Amine Blush in Epoxy Coatings?
Amine blush is a chemical reaction between water, carbon dioxide and amine curatives in epoxy coatings. Amines are hygroscopic in nature, which allows them to adsorb moisture from the air & react with the remaining moisture and carbon dioxide. When the epoxy coating is applied under varying temperatures and humidity levels, the presence of amine blush can lead to decreased adhesion of following coatings and several surface issues.
Omkar Industries, a leading epoxy paint manufacturer in India, offers well-formulated epoxy paints to reduce the chances of amine blush to meet your application and cure requirements.
How to Identify Amine Blush?
Amine blush can be identified as greasy, sticky, and waxy deposits on the surface. It appears as oily, hazy white spots catergorized by dullness and opacity. One of the main issues with amine blush is that it may not be easily visible. Amine blush tests, like TCQ Amine Blush Kit and Elcometer 139 Amine Blush Swap Test Kit, can help determine the presence of blush on the surface.
How to Prevent Amine Blush?
The following are some ways to prevent an amine blush:
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Apply Coating at Proper Temperature
The best way to prevent this issue is to assess and control the environmental conditions prior, during and after the application. Ensure to apply the epoxy coating when the air and surface temperatures are within the recommended temperature range to minimize the chances of adsorption of moisture.
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Follow Humidity Control Measures
For optimal coating, low-humidity environments are the best as they reduce moisture and lower the vapour for amines to adsorb. In this, humidifiers can help reduce moisture adsorption during curing.
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Amine Blush Removal
Amine blush is water soluble, so solvents are ineffective in removing blush. Using detergent or degreaser with warm water with a bristle brush can help easily remove amine blush from the surface.
Buy Top-Quality Epoxy Paints from Omkar Industries
Omkar Industries is one of the most trusted epoxy paint suppliers in India. Our range of epoxy paints is precisely formulated under stringent manufacturing & quality control measures for high-performance, long-lasting & vibrant coatings. Contact us to discuss your industrial paint requirements.
