THE EXPOSURE OF THE BASE STEEL OF TINPLATE IS KNOWN TO BE PRESENT ON THE OUTERMOST SURFACE OF DI CAN BODIES. EXPOSED IRON CAUSES EARLY PERFORATION OR UNDER FILM CORROSION (UFC) AS COEXISTENT TIN DOES NOT BEHAVE AS A SACRIFICIAL ANODE TO IRON IN COATED CANS. TO REDUCE STEEL EXPOSURE AND UFC, A SURFACE TREATMENT WAS DEVELOPED, A KIND OF CONVERSION COATING OF AN EXTREMELY THIN FILM OF TIN, PHOSPHORUS, AND OXYGEN. TO EVALUATE IRON EXPOSURE OF UNCOATED CANS, A SPECIALLY DESIGNED COMPOSITE ELECTRODE WAS USED.
| Number of Pages : | 12 |
| Published : | 06/01/1990 |
