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March 2017

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From:
"Nutting, Phil" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Nutting, Phil
Date:
Tue, 7 Mar 2017 18:37:00 +0000
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Yup, in every solder pot that does not get proper maintenance.



From: Wayne Thayer [mailto:[log in to unmask]]

Sent: Tuesday, March 07, 2017 1:36 PM

To: TechNet E-Mail Forum; Nutting, Phil

Subject: RE: grunge at bottom of tinning solder pot



Superior adhesion and hardness, with a relatively low temperature process! Can you replicate this stuff?



-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Nutting, Phil

Sent: Tuesday, March 07, 2017 10:32 AM

To: [log in to unmask]<mailto:[log in to unmask]>

Subject: Re: [TN] grunge at bottom of tinning solder pot



If it were so simple. The pots were typically run very hot and for long periods with only the dross on the top of the solder skimmed off. No one ever scraped the side walls of the crucible so now there is rock hard, non-melting crud that defies removal.



-----Original Message-----

From: Stadem, Richard D. [mailto:[log in to unmask]]

Sent: Tuesday, March 07, 2017 1:25 PM

To: TechNet E-Mail Forum; Nutting, Phil

Subject: RE: grunge at bottom of tinning solder pot



I assume you can turn on the pot and melt the solder, then scoop both the molten solder and the crud out, scrape it clean, fill it with fresh solder and send it out for analysis, if it passes continue production, update the maintenance schedule, and go from there.



-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Nutting, Phil

Sent: Tuesday, March 07, 2017 12:13 PM

To: [log in to unmask]<mailto:[log in to unmask]>

Subject: [TN] grunge at bottom of tinning solder pot



I have two wire tinning solder pots that have not received the proper day-to-day maintenance and now there is solid crud filling all but about ΒΌ of the crucible. I have tried chiseling it out and drilling it out. All I end up with is dull tools, even carbide drills.



Other than buying new solder pots or replacing the crucibles are there any suggestions for removing this super hard stuff?



Phil Nutting | HVP Development Engineer | Excelitas Technologies Corp



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