the.com/soldering
melting metal glue to make tiny things obey you forever, or until they don't
means Joining metal pieces by melting a softer filler metal (solder) between them, which cools into a solid electrical or mechanical bond without melting the base parts themselves.
from From the verb 'solder,' which came into English through Old French 'souder' (to consolidate, make solid), from Latin 'solidare' (to make firm), a relative of 'solidus' — solid. The buried 'l' that we now sometimes pronounce was actually restored by scholars looking back to the Latin; for a long stretch English speakers happily said 'sodder,' a pronunciation that still survives in American English.
- melt point
- solder flows around 180-190C, cooler than baking cookies
- no lead now
- EU banned lead solder in most electronics by 2006
- flux secret
- the real magic is cleaning oxide, not heat
- ancient craft
- Egyptians soldered gold jewelry over 5,000 years ago
- cold joint
- a dull, cracked blob means it never truly bonded
apollo 11 lunar module — 1,500+ solder joints connected the guidance computer that landed humans on the moon in 1969
james webb space telescope — over 200,000 solder connections in the infrared detector arrays launched in 2021