Electronics Forum: saponifiers (Page 11 of 19)

Saponifier Concentration Measurement

Electronics Forum | Mon Aug 26 12:44:42 EDT 2002 | dragonslayr

Scott- I've used both methods, titration and refractometer. Both are simple to perform. Titration is a simple, high school science class type process. Follow the chemical mixes accurately and then compare the resulting color change of liquid to a cha

White residue after cleaning with IPA

Electronics Forum | Mon Jan 27 12:02:00 EST 2003 | Mike Konrad

Dave is correct. No-clean flux + water = white residue (unless the proper chemical is mixed with the water). Additionally, no-clean flux + IPA = white residue. Many saponifiers work well as do other cleaning agents. White residue may also be a re

Re: Corroding Solder Joints

Electronics Forum | Tue Dec 28 15:12:03 EST 1999 | Bill Schreiber

Rick, Ultrasonics is a mechanical scrubbing action (cavitation) similar to any other scrubbing action, if you scrub long enough, you stand the chance of wearing away some of the surface material (shiny coating of a solder joint). The shiny coat on a

Re: More informations on water clean for CSP/BGA package

Electronics Forum | Wed Oct 06 12:03:12 EDT 1999 | Graham Naisbitt

Hi, Help! Could anyone help to enlighten me on this? Question: If I have a CSP/BGA package of size X by Y and the standoff gap between the component and PCB is Z, What is the maximum allowable Y/Z or X/Z that using a n

Re: Aqueous Cleaning

Electronics Forum | Fri Jul 30 20:11:35 EDT 1999 | Mike Konrad

It is true that the use of saponifiers (and other water soluble additives) will lower the surface tension and aid in under component penetration. It is also true, however, that other specific design features within a batch machine can also aid in un

Corroding Solder Joints

Electronics Forum | Mon Dec 27 12:24:47 EST 1999 | RICK_EEI

Hi everyone. We use a small ultrasonic aqueous cleaner. After each PCB we hand solder, (water soluble) we place it in the cleaner immediately. Lately we have had some problems with the solder joints appearing to be corroding away. We tried lowering t

Re: Opinions on in-line wash equipment?

Electronics Forum | Tue Jun 22 12:55:45 EDT 1999 | Mike Konrad

You may want to rethink using an inline for both OA and No-Clean applications. Since the majority of your applications are OA, it would not make a lot of economic sense to run saponifier in your inline for a minority application. My suggestion is t

Stainless Steel in wash system

Electronics Forum | Fri Sep 14 13:07:06 EDT 2001 | bschreiber

Dave, The saponifier (or any additive) will supply free ions and contaminate the DI water. If no contamination is introduced (very difficult) or if fresh hot DI water is constantly added as in a steam age chamber, the DI water will begin to obtain

Saponifier Concentration Measurement

Electronics Forum | Tue Dec 04 12:49:49 EST 2001 | bcaler

We use a Hach digital titrator. You can buy a digital titrator kit, hydrochloric acid, phenolphthalein indicator powder pillows, turkey baseter (or some bulbus sucking device) and a couple small measuring cups. We do tests twice per shift (more is

Operator mistakenly used No Clean paste instead of Clean.

Electronics Forum | Fri Jul 19 21:19:25 EDT 2002 | yngwie

Hi, I know this is a total screwed-up. Operator used the wrong paste. It was supposed to be a clean paste but she was issued with no clean paste. What happen was when the brd processed thru', after the reflow, the girl passed the boards thru' DI wa

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