Spray Aluminizing involves deposition molten Aluminium of purity 99.5% on to a prepared surface. The metal being sprayed is melted in an Electric Arc atomized by compressed air and then projected on to the substrate has been prepared by Sand & Quartz Blasting. As per the IS & BS Standards (it will withstand up to 950ºC)
Advantage :
> Site job possible
> No size limitation
> Better surface preparation
> Cold process
> Pure aluminum coating
> Ideal surface for painting
Sealant :
The metal-sprayed coating is in itself a complete protective system for iron or steel structures. The use of a sealant, however, enhances this protection and also produces a pleasing appearance.
Advantage :
a. It penetrates and fills the pores, thus reducing the total area of the exposed metal and therefore, the rate of dissolution of the coating.
b. It smoothes the surface texture preventing the retention of grime and other contaminants, thus reducing still further the rate of surface attack.
c. By smoothing the surface texture the appearance of the coating will remain cleaner and more attractive than without a sealant, and may more readily be maintained in a clean condition.
Testing Procedure :
As per IS & BS standards we carryout the job of Metallizing/Aluminizing to the coating thickness of 150 to 175 microns this as to be confirmed by thickness measurement gauge before giving for sealant application after application of sealant the final coating thickness should be 175 to 200 microns.
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