I'm looking for the title of a book. I have few details other than that people were being rescued from the surface of an alien planet which had something which was attracted to metal. They were being hoisted to safety, but something metal on the cable was being attacked by a swarm of small possibly glowing aliens. I read it in the 70's.
This sounds like "Escape from Splatterbang", also known as "Marooned on Splatterbang" or "Flamers", by Nicholas Fisk, published in 1979. A boy named Mykl and a gypsy girl called Amina are accidentally left behind on a planet, where the indigenous lifeforms, which have the appearance of bolts of light, consume metal as part of their life cycle. When one of the aliens, called "flamers" from their appearance, attacks a piece of metal it makes a "splatter-bang!" sound - which is the informal name given to the planet. To rescue them, the spaceship stays in low orbit, out of range of the flamers, and lowers a plastic container down to the planet's surface. The container is attached to a cable which is mainly synthetic fibre, but does contain some metal strands for reinforcement. This metal is attacked by the lifeforms, but the cable holds just long enough for the kids to be winched up to safety.