Why do we use flux in soldering?

Related questions

1. What is no clean solder?
2. Does rosin core solder contain lead?
3. What type of flux is used for electric soldering?
4. Can you use hot glue instead of solder?
5. How dangerous is flux?
6. What can be used as flux?
7. What are COB LED's?
8. Can I melt solder with a lighter?
9. What does solder paste do?
10. Can you use a lighter to solder?

Tags

1. #cleaning
2. #joining
3. #flowing
4. #agent
5. #which
6. #chemical
7. #metal
8. #soldering
9. #prevent
10. #basic
11. #using
12. #extractive
13. #metallurgy
14. #materials
15. #oxidation
16. #filler
17. #purpose