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Tools For Cleaning PCB after Soldering

Views: 3474

#77267

Tools For Cleaning PCB after Soldering | 16 March, 2017

Hi! I have a very basic question about PCB cleaning. Which is the best way to clean the PCB after soldering? We use a lead free solder wire (3,5% flux inside the core) and after the soldering its a visible wetting,flux around the joint. When using the Flux remover the surface gets clean but it leaves sticky on it (when touch with fingers). Same things occurs when cleaning with IPA.

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#77270

Tools For Cleaning PCB after Soldering | 16 March, 2017

The best way to clean after soldering is to develop a "no clean" process and save the cost and labor of cleaning.

Also a "questionable" way to develop clients is to post scenarios that appear to be real when in fact you are trying to generate business.

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#77271

Tools For Cleaning PCB after Soldering | 16 March, 2017

"Also a "questionable" way to develop clients is to post scenarios that appear to be real when in fact you are trying to generate business."

^ lol

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#77302

Tools For Cleaning PCB after Soldering | 23 March, 2017

You should drawing the attention of large contract manufacturers and large supply chain players.

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Rob

#77303

Tools For Cleaning PCB after Soldering | 23 March, 2017

Have you thought of contacting these people: http://www.solder.net/ I have a feeling they may be quite close to you geographically.

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#77306

Tools For Cleaning PCB after Soldering | 23 March, 2017

Rob,

That is where Bob works. -------------------------------------------------------

There are many companies that exist offering multiple different products and procedures for cleaning pcb assemblies.

I agree, in my practice, most companies strive for lean manufacturing processes that eliminate post-soldering cleaning cycles to begin with. Albeit, we have all been told cleaning should be done before and after soldering. In the real world, however, it is much different from what we learn in text book.

From a manual cleaning practice stand-point, as you stated Bob, we typically perform a majority of our cleaning using an Isopropyl Base which does a sufficient job on most applications. However to completely remove all "tackiness" is somewhat cumbersome for most manufacturers looking to improve through-put.

For hard to clean applications (eg, difficult to reach areas) or applications requiring additional cleaning - I would explore Table-Top Ultrasonic cleaning stations.

I had the opportunity to review/demo an ultra-sonic cleaning station at the 2016 SMTAi Expo in Rosemont, IL and found these to be very efficient at cleaning hard to reach areas (and to remove tackiness). Some companies will even offer product demos for clients truly interested in making the investment.

If anything, reduce the quantity / percentage of flux core in your solder wire to reduce the amount of removal/cleaning being done by hand. - If standard brushing and KimTech wipes are not enough, try adding some IPA and, using a can of compressed air, blast the "wet" IPA off and you should be able to see the remaining contaminants on the assembly. This will not help with removing "tackiness" but it will show you how "unclean" your supposedly "clean" board is.

*Note - Not all solders are the same. Depending upon which manufacture you are using for solder materials - there are a multitude of different material technologies available that may be more suited for your specific application requirements. This may also be an avenue for continued exploration.

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Rob

#77308

Tools For Cleaning PCB after Soldering | 23 March, 2017

Yep I know, British humour.

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#77309

Tools For Cleaning PCB after Soldering | 23 March, 2017

Rob,

Just wanted you to know......I got it.

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#77310

Tools For Cleaning PCB after Soldering | 23 March, 2017

Rob,

Even this Yank got that British humor. I guess the guys at Business Electronic Soldering Technologies are not very busy lately. All of these thinly veiled advertisements they are posting here just makes me not want to use them.

Jerry

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Rob

#77311

Tools For Cleaning PCB after Soldering | 24 March, 2017

Thanks Charlie & Jerry, subtlety is not something I have ever been accused of in the past.

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PCB Cleaning

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