Why is solder flux needed?

Related questions

1. Do you need flux when soldering?
2. Which is better cob or SMD LED?
3. How dangerous is flux?
4. What does solder paste do?
5. What is soft soldering and hard soldering?
6. What can I use for a soldering tip?
7. Can you use hot glue instead of solder?
8. What temperature is best for soldering?
9. Is flux required for electrical soldering?
10. Is soldering easy?

Tags

1. #prevent
2. #metal
3. #purpose
4. #solder
5. #surfaces
6. #oxide
7. #filler
8. #which
9. #difficult
10. #layers
11. #allows
12. #helps
13. #connection
14. #without
15. #breaks
16. #making
17. #because
18. #primary
19. #materials
20. #oxidation