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Is there a way to tell if solder residue corrosive or not?

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alexg:
Hello, is there a way to tell by looking at soldering residue if it corrosive or not? I have few rolls of soldering wire that I absolutely love more than any other big brand names I tried, it flows fantastically, leaves very little residue, etc.
https://www.amazon.com/massmall-Solder-Electrical-Solderding-0-0119inches/dp/B012CFLF4U

However, there is no information what kind of flux does it have inside, clean, no clean, corrosive, non-corrosive. I currently do clean it with IPA but it is few extra steps that I would like to eliminate, the visual appearance of residue is not an issue but my question is, is there a way to tell if residue is corrosive without waiting few years to see? Are there any telltale signs that can tell if its corrosive or not?

Thank you

tooki:
It says right on the product page you linked: "Product Name: Rosin Flux Core Solder"

So I'll go out on a limb and say it's rosin flux. ;)

helius:
The IPC standard tests for flux corrosivity are the copper mirror test and coupon tests. Copper mirrors are glass microscope slides which have been sputter coated with a thin copper film. The flux is applied to the mirror and then heated to its activation temperature, and the result is observed over several days for signs of corrosion (which will be visible as pinholes when light is viewed through the slide).
The coupon tests are just squares of copper clad PCB which have been soldered with the solder and flux under test. They are placed in an environmental chamber under elevated heat and humidity for an accelerated age test. At 120 hours, the coupons are examined for signs of corrosion, specifically changes in color of the copper and the solder alloy.

Cnoob:
On Amazon that solder is $7.99 for 65grams which is $61 for 500grams which is not cheap solder
so it should good.
I will stick to the Loctite Brand

schmitt trigger:
When one purchases items from any of the giant online retailers, one has to assume that due-diligence is part of the total cost when purchasing those items.

That applies to almost everything...... I.e. a power supply rated for 50 watts, may only deliver those 50 watts within a very narrow input voltage range.
This "feature" won't be listed, this forum and others are filled with stories of unsuspecting buyers where the device they purchased fails to meet a particular feature.

Returning to the case of the solder, there are two clear paths to follow:
-Perform the due diligence yourself by employing some test coupons, as suggested by Helius
-Or assume that you should always clean the flux residue. And continue to do so.

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