Refractory coatings are used on molds and cores to enhance the surface finish of the casting and reduce casting defects which occur at the sand-metal interface. The casting accomplishes this by having a higher melting point than the sand, and/or by forming an impermeable barrier between the sand grains and metal.
 HA International coatings are based on five major components:
- Refractory System
- Carrier System
- Suspension System
- Binder System
- Chemical Modifiers.
The refractory system is the most important part of the coating, as it will determine the effectiveness of the coating. The type, shape, size distribution, thermal expansion, chemical reactivity, thermal conductivity and specific gravity are the basic criteria for selection of the proper refractory. The most commonly used liquid carriers are water and alcohol. The suspension system must keep all of the refractory material and other additives homogeneously dispersed. The binder system is designed to bond the refractory particles to each other and the sand matrix and are used in very small amounts. Finally, chemical modifiers are used to enhance the coating with wetting agents, defoamers, preservatives and stabilizers.
How Refractory Coatings Are Made
Click here to learn more about the Six Sigma improvements HAI has made in the manufacturing of refractory coatings to maintain our leadership position in the foundry industry.
How to Mix Refractory Coatings
Click on the following links for instructions on mixing our Refractory Coatings products.
| Premix Instructions |
Paste Instructions |
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EcoMission Products
HA International supports sustainability by minimizing foundry environmental impact of our products while continually improving their performance and value. Our refractory coatings Dura Kote, EZ Lite and Techni Kote are part of the Environmental Solution. Click here to learn more about our other environmentally friendly product lines and how HAI is Leading the Mission to Environmental Sustainability.
Click here to learn more |
Techni Kote 6000 Series
In 2007, HA International introduced a
premier refractory coating product line,
the Techni Kote 6000 Series. It provides
better coating efficiency
and improves the quality
of castings. A reduction
in overall operational
expenses is achieved
with lower scrap rates,
increased coating mileage,
elimination of sand
additives, and reduced
cleaning room costs.
Click here to view our Techni Kote 6000 Series product offerings.
It’s A Whole New Ballgame with HA International. |
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