Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

detection of rosin concentration in a flux

detection of rosin concentration in a flux

detection of rosin concentration in a flux

Is any one beware of a quick method to detect the concentration of rosin in flux. The flux is used in soldering process. It normally has 95% 2-propanol, 1-2% rosin and some other additives. I'm looking for a quick, convenient way to detect the change of rosin concentration because of evaporation. Thanks for advices.


RE: detection of rosin concentration in a flux

Take a viscosity reading of the flux at optimal water concentration.  Compare all additional readings to this temperature.

The thickness of the flux will tell you how much water has evaporated, therefore indicating the rosin concentration.

RE: detection of rosin concentration in a flux

Thanks for the response. You mentioned water based flux. What about an alcohol based as I used?

RE: detection of rosin concentration in a flux

Sorry, I should have read a little more closely to begin with.

I don't think the method of testing would have to change any (you could still use a viscometer), but I'm not sure how much different the viscosity would change as a result evaporation.  You'd have to get a pretty sensitive instrument to detect the changes you need to measure.

Maybe you could look into turbidity meters as well.  They can be used measure the amount of suspended solids in a otherwise clear solution.  I would assume that the less alcohol your flux has, the more dense the solution would become.  I'm not so familar with these meters, but you could at least investigate it a bit more.

RE: detection of rosin concentration in a flux

Thank you very much for the information. It's very helpful for me to begin.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close