View source for Abrasion-resistant Coatings

[[Category:Corrosion]]{{Knoppen}} 
[[File:Abrasion-resistant_Coatings_01.jpg|thumb|right|Abbrasion Resistant Coating tools]]
[[File:Abrasion-resistant_Coatings_02.jpg|thumb|right|Abbrasion Resistant Coating pipe]]
'''Abrasion-resistant Coatings''' help to avoid the wearing away of parts and equipment due to mechanical or contact related forces. Abrasion, also known as grinding or wearing away due to friction, is a factor on any industrial part, no matter the hardness. Abrasion resistant coatings help to minimize the effect of friction on the outer surface of metal parts. These offer four different options for your abrasion restant coating solutions:  
With the help of abrasion resistant coatings, hardness is only the beginning. Each of its four options help components maintain more conformity with specified dimensional tolerances, while maintaining a profitable mix between bond strength, coverage reliability, dimensional stability and cost effectiveness.

Conventional abrasion-resistant coatings often feature metal oxide  particles incorporated within the resin film to suppress marring,  scratching or abrading of the coating. Alumina is the preferred oxide  for this purpose due to its extreme hardness (9 on the Mohs scale), and  relatively low cost. The drawback to such alumina-containing films is  that, although the abrasion resistance is often improved, the  transparency of the coating is compromised due to the light scattering  of the micron-sized alumina particles used. 

However, the use of  nanometer-sized alumina in such coatings offers a solution to this  problem since the particles are less than 100 nm in diameter, and  thereby greatly reduces haze from light scattering. In addition, the  alumina particles produced in the PVS process are spherical, which,  combined with their small and uniform size, yields a more even film  surface to further enhance the scratch resistance of the coating.

The abrasion resistance properties of nanocrystalline alumina were  evaluated by incorporating the particles in a crosslinked  melamine-formaldehyde resin. Because melamine-formaldehyde resins are  transparent and very hard, they are often used as protective coatings on  non-flexible surfaces such as furniture and flooring. The alumina was  first dispersed in water to disrupt the loose powder agglomerates, and  then surface treated to attach functional groups to the oxide surface.  The surface functionalization process was designed to prevent particle  agglomeration during the film curing process. 

A TEM image of the coated  alumina particles is shown in Figure 1. As the image shows, the  spherical alumina particles are each coated with a thin uniform layer  approximately 0.5-1 nm thick. The coated alumina particles were blended  with the aqueous melamine-formaldehyde resin system at the desired  concentration, from which films were drawn down on glass substrates at 1  mil thickness and cured by heating at 150oC for 15 minutes. The cured  film thickness was 9.6 mm.

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