I have been looking to downsize and have seen a sixty or so year old
bungalow.
The radiatprs are c 1968-70. Assuming that electrolytic action has
hollowed them out and that they may need replacing, are the copper pipes
likely to be equally affected?

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Mint 20.0, kernel 5.4.0-45-generic, Cinnamon 4.6.7
running on an AMD Phenom II X4 Black edition processor with 8GB of DRAM.