# \#soldering-flux

**URL:** https://sierraconnect.protoexpress.com/tag/soldering-flux/307.md

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## [How do you evaluate the acids, solids, and solvents in a soldering flux?](https://sierraconnect.protoexpress.com/t/how-do-you-evaluate-the-acids-solids-and-solvents-in-a-soldering-flux/4510)

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**Author:** [@Zaibahmed\_Mannur](https://sierraconnect.protoexpress.com/u/Zaibahmed_Mannur)\
**Replies:** 3\
**Last updated:** [September 23, 2026, 1:48pm UTC](https://sierraconnect.protoexpress.com/t/how-do-you-evaluate-the-acids-solids-and-solvents-in-a-soldering-flux/4510 "2026-09-23T13:48:13Z")

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Last week, we discussed How do you choose the right soldering flux for PCB assembly. This post continues that discussion by looking at the three main components of flux that are acids, solids, and solvents, and how each …

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## [How do you choose the right soldering flux for PCB assembly?](https://sierraconnect.protoexpress.com/t/how-do-you-choose-the-right-soldering-flux-for-pcb-assembly/4490)

<div class="topic-metadata">

**Author:** [@Zaibahmed\_Mannur](https://sierraconnect.protoexpress.com/u/Zaibahmed_Mannur)\
**Replies:** 2\
**Last updated:** [September 16, 2026, 2:11pm UTC](https://sierraconnect.protoexpress.com/t/how-do-you-choose-the-right-soldering-flux-for-pcb-assembly/4490 "2026-09-16T14:11:52Z")

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Flux plays a critical role in solder wetting by removing oxides and preventing reoxidation before solder is applied. The challenge is choosing enough flux activity to achieve reliable wetting without introducing unnecess…