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Here you can find knowledge about Water-Soluble Solder Paste, including but not limited to usage methods, installation techniques, troubleshooting and more. Focused on SMT soldering processes. If you can't find what you need, please contact us anytime.
The classification of solder wire flux types must strictly align with the activity grades, halogen content, and residue cleanability requirements for rosin-based, no-clean, and water-soluble fluxes specified in the IPC J-STD-004B standard. Although water-soluble fluxes offer the advantages of high activity and easy cleaning, they carry a risk of chloride ion residue exceeding the 2.5μg/cm2 limit. If the production line fails to implement the deionized water rinsing process specified in IEC 61189-2, it will easily lead to PCBA corrosion failure.
Published: 2026-08-27The choice between no-clean solder paste and water-washable solder paste must be closely aligned with the actual production line conditions. For example, when QFN solder wetting requirements are close to 100%, the 8MQP/5RQ series should be prioritized. For low-voidage scenarios such as automotive lighting, halogen-free 8M9P/5RR must be used. Water-washable solder pastes like 8MW1P/5RW1 are suitable for cost-sensitive production lines equipped with cleaning equipment. Domestic solder pastes now cover the full spectrum from ultra-low-temperature In52Sn48 to laser-specific 5RLJ. The key lies in matching the process window with reliability requirements.
Published: 2009-01-15Our technical team is always ready to provide professional solder material selection advice and SMT process solutions.