Table 5. Bonding Strengths of Formulation 101-2 on Steel 

 Surfaces Cleaned by Different Methods 



Treatment 

 Number*^ 



Breaking Strength 

 (kg/sq cm) 



Method of Failure 



1 

 2 

 3 

 4 

 5 

 6 



9; 8 

 18; 17 

 10; 6 



7; 10 

 26; 24 



3; 9 



coating 



mostly adhesive 



coating 



coating 



both coating and adhesive 



coating 



See text for description of treatments. 



cursory cleaning by scraping and wirebrushing to remove loose paint, 

 chalk, and other surface contamination. The four orange paints were 

 applied in 1 -f oot squares that were easily distinguished from the adjacent 

 red paint. The portions above water were still wet from the rinsing 

 when painted. Application was faster above water and generally smoother. 

 Formulations 101-2 and 102-2 were much easier to apply than 101-5 and 

 102-5. They all displayed a tendency to sag from a vertical surface 

 when applied above water. 



USE OF CEL UNDERWATER- APPLIED PAINT BY PORT OF LONG BEACH 



Pier C at the Port of Long Beach had numerous weak areas (about 

 200) where holes or thin places had occurred in the steel sheet piling. 

 A contract was negotiated with Pacific Marine Enterprises of Seal Beach, 

 California, to cut out these areas and repair them by welding in steel 

 plates. The contract specified coating the oval-shaped plates (about 3 

 to 6 sq ft in area) with CEL epoxy paint and touching up by brush the 

 weld areas. The procedure used was to roll two coats of formulation 

 101-19 onto the steel plates to give about 20 mils dry film thickness, 

 weld these plates in place, clean the welds, and apply two coats of 

 paint to them underwater. 



