During soldering, the flux removes metal oxides as well as other surface tarnishes such as grease or metal carbonates, allowing the coalescence of solder powder and parts wetting by the molten solder.

• 焊接过程中，焊剂有助于去除金属氧化物以及油脂、金属碳化物等表面锈蚀，从而便于焊料粉末和其他成分被熔化的焊膏所润湿。