Table 58. Typical uses of coatings. 



Generic Type 



Use 



Alkyds 



On metals in mild marine atmos- 

 phere. 



Silicone Alkyds 



On metals in mild marine atmosphere. 



Acrylic (Solvent based) 



On metals in moderately severe marine 

 atmosphere. 



Acrylic (Water Reducables) 



On masonry, concrete and wood in 

 moderately severe marine atmosphere. 



Chlorinated Rubber 



On metals in splash and submerged 





zones. 



Coal Tar 





a. Mastics and Coal-Tar 

 Cutbacks 



Splash and submerged zones. 



b. Modified Coal Tar 



Splash and submerged zone. 



Epoxies (Catalyzed) 



Splash and submerged zone; has ex- 

 cellent toughness. 



Epoxies - Phenolic 



Splash and submerged zone but is 

 brittle. 



Phenolics 



Heat cured; high corrosion resis- 

 tance but brittle; used for tank 





linings. 



Polyurethanes (or Urethanes) 



Usually heat cured; splash and 

 submerged zone; tough with high 

 abrasion resistance. 



Vinyls 



Marine atmosphere, splash and sub- 

 merged zones; poor solvent resistance. 



Zinc (Inorganic) 



Splash and submerged zone; used as 

 single or multiple coat system. 



Zinc (Organic) 



Splash and submerged zone; generally 

 the higher the zinc content the 





better the coating. 



Underwater Coatings and 



Good for in place structures in sub- 



Mastics 



merged structure. 



373 



