Electronics Forum: acid (Page 1 of 24)

RF 800 Flux ( cookson brand) - Flux acid calculation and restoration of acid value from 17 to 19

Electronics Forum | Fri Sep 08 12:03:24 EDT 2017 | rameshraja

Hi, I need the RF 800 Flux Acid titration procedure and also require EPT of the same to add thinner ( RF 800 additive), i.e we are using the flux rf 800 for our wave soldering process having foam fluxer , after 2 hours we are taking sample from the

Wastewater Issues with Saponifiers

Electronics Forum | Thu Nov 06 00:41:43 EST 2003 | Mike Konrad

Consider adding measured amounts of muriatic acid to the holding tank. Muriatic acid is used as a pH reducer and is available at pool supply stores. An alternative to muriatic acid is granular sodium bisulfate, also available at some pool supply st

Flux Acid Value Meaning ?

Electronics Forum | Thu Jul 25 14:32:55 EDT 2019 | bulur

What does flux acid value means in SMD and PTH applications? Is it higher acid values better for each application?

Re: Dibasic Flux Activators

Electronics Forum | Wed Aug 23 16:32:19 EDT 2000 | Dr. Ning-Cheng Lee

"Dibasic" means a molecule containind two acid functional groups, such as carboxylic acid. The inductive effect makes the dibasic activator more active than mono-basic activator.

Re: Dibasic Flux Activators

Electronics Forum | Thu Aug 24 13:13:42 EDT 2000 | Dr. Ning-Cheng Lee

Inductive effect is the electron attraction force between chemical moieties. Inductive effect in flux activator would stabilize the dissociated organic acid, thus enhance the acidity, therefore increase the flux activity.

What does OA stand for?

Electronics Forum | Tue May 29 17:04:35 EDT 2001 | pcmarch

I will second the previous answer that it stands for Organic Acid. "Acid" being the key word as to why it must be thoroughly cleaned.

Cleaning Copper Surface

Electronics Forum | Tue Feb 02 16:57:33 EST 2010 | flipit

Like Dave said, you need to use an acid solution. This is what is used prior to HASL. You will think I am crazy but you can use vinegar or even catsup/ketchup. The acetic acid will clean the oxidation. Just rinse the board off before using.

What does OA stand for?

Electronics Forum | Wed May 23 11:32:13 EDT 2001 | kmorris

I beleive it's Organic Acid

PCB becomes darken (yellownish)

Electronics Forum | Thu Aug 28 04:07:46 EDT 2008 | kelson

Hi robinj As you have mentioned, if the color is yellow usually it is caused by moisture left on the boards from poor drying after immersion silver. However, our boards were received from the supplier and the changes happened in our side. So, what di

PCB becomes darken (yellownish)

Electronics Forum | Wed Sep 03 11:42:21 EDT 2008 | robinj

If the tarnish is really dark, it is very difficult to remove. Since it is yellowish it is only in the early stages. Replating will definitely work. I have used sulfuric acid based cleaners to remove this yellowish color. But rinse well and dry quick

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