Table 2. Thickness of Zinc Inorganic Silicate Coating 

 Applied to Heat Exchangers 



Heat Exchanger 

 Material 



Fin Thickness , 

 mils (mm) 



Dry Film Thickness, 

 mils (mm) 



Aluminum tube/ 

 Aluminum fin 



Copper tube/ 

 Copper fin 



Copper tube/. 

 Aluminum fin 



17.3 (0.44) 

 23.1 (0.59) 

 19.3 (0.49) 



3.6 (0.09) 

 2.0 (0.05) 

 4.4 (0.11) 



Dimetcote No. 3. 



The factory-applied synthetic enamel had been removed. 



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