How do you avoid corrosion on boards?

[JorgePayar]

HI, when Im working on a board and I use flux, I cannot leave the board with the flux because of corrosion, or use 99% IPA and leave it.

What do you guys do when you are working in a board for a long period of time to avoid moisture or corrosion?

 

[larossmann]

I am confused, is your flux actually corroding the board?

 

[JorgePayar]

Yes, that is why I bought you the amtech 559
If I leave the flux one day I can see moisture and corrosion in only a day
this is what I have actually, the flux is good when you are soldering but it is a piece of crap because of this

PS: I don't use the brush

 

[aprendiz]

This flux is water soluble, so it is highly corrosive and must be cleaned immediately after use it, and it is recommended for plumbing...
http://www.laco.com/soldering-fluxes/regular-flux-paste/

 

[JorgePayar]

Fuck!! I didn't know it, thanks aprendiz, in few days I will get the amtech flux from Louis