Unclassified 



Security Classification 



DOCUMENT CONTROL DATA -R&D 



Naval Civil Engineering Laboratory 

 Port Hueneme, California 93041 



Unclassified 



PLASTIC FILM COATINGS FOR PROTECTION FROM MARINE FOULING AND 

 CORROSION 



ESCRIPT1VE NOTES (Type of report and inclusive dates) 



Not final; July 1967-August 1968 



UTHORI5) (First name, middle initial, last name) 



James S. Muraoka 



February 1969 



23 



YF 38.535.005.01.003 



TR-612 



This document has been approved for public release and sale; its distribution is unlimited. 



Naval Facilities Engineering Command 

 Washington, D. C. 



Saran and polytetrafluoroethylene (TFE) films with a pressure-sensitive adhesive were 

 applied Over the surfaces of painted and unpainted carbon steel panels and unpainted stainless 

 steel and K-Monel panels. These panels were submerged in the sea to determine if the plastic 

 film coverings can be effectively used to (1 ) protect painted as well as unpainted metal specimens 

 from fouling and corrosion; (2) remove marine growth that becomes attached to the plastic film 

 simply by stripping off the covering; and (3) prolong the fouling-free and corrosion-free intervals 

 so as to decrease the total effort required for reconditioning fouled or corroded surfaces. The 

 saran- and TFE-covered panels were exposed in the sea for 5 and 8.5 months, respectively. When 

 retrieved, the panels were completely covered with marine growth, including numerous large 

 barnacles. Generally, the plastic films protected the test panels from fouling and corrosion. The 

 marine growth could be removed rapidly by stripping off the protective plastic covering. Crevice 

 corrosion will occur under the protective plastic film on susceptible metal panels, such as stainless 

 steel (type 302), when a small amount of seawater enters through ruptures. 



DD 



,1473 



Unclassified 



S/N 0101- 807-6801 



