Corrosion of Silver-Plated Copper Conductors - NEPP

Figure 20. Longitudinal sections showing the most
severely corroded strands (some oxidised
throughout their section) from sample no. 9. Slight
subsurface exists oil on one strand of the inner
conductor, after 10d of accelerated corrosion
testing. All strands are of 1 m m silver-plated
328
copper. The insulation materials are natural FEP
for the outer jacket and natural PTFE on the inner
conductors.
a. Extensive red corrosion on adjacent strands
(x 100);
b. Corrosion and fracturing occurred through
many strands (x 600);
c. c. Inner conductor shows some red (R) and
black (B) spots (x 100):
d. d. internal corrosion (x 600)
ESA Journal 1984, Vol. 8