Indium VOC Free Liquid Flux WF7742 - 10 LITRE Container

WF-7742 is a VOC-free, no-clean flux specifically developed for Pb-free wave soldering of surface mount, mixed-technology, and through-hole electronic assemblies. 7742 is a water-based, nonflammable formulation dramatically reducing VOC emissions and eliminating special storage requirements. A wide process window provides excellent solderability on difficult-to-solder assemblies and reduces solder balling.

Features

• Excellent surface wetting
• Eliminates cleaning
• Wide process window
• Use with Pb-free and SnPb assembly processes

Process Recommendations

WF-7742 should be applied by ultrasonic spray for best results. Topside board temperatures can range from 110–135°C depending on equipment capability and assembly requirements. Contact with the solder wave can be as long as 5 seconds. Preheat temperature should be adjusted to ensure complete water removal before contact with the solder wave.A thin uniform flux deposition of 1,000–1,500 micrograms per square inch of flux solids should be applied as a starting point. Because WF-7742 is water-based, it does not require frequent acid value monitoring. If thinning is required, deionized water should be used.WF-7742 may freeze if exposed to temperatures below 0°C (32°F). If the flux becomes frozen, bring to room temperature until thawed and agitate. The material is not affected by freezing.