Lead-free wave soldering requires tighter process control than soldering with lead based alloys. A key area of the machine that impacts the ability to solder lead-free alloys without defects is the fluxer system. A large variety of fluxers are available for use with lead-free soldering - each having advantages and disadvantages.
Electrovert Wave Soldering Technical Papers
The popular tin (Sn) rich lead free solders are causing severe corrosion to many of the materials used in today’s Wave Solder systems. Users are experiencing higher maintenance frequency and reduced life of wave solder machine components.
The increasing use of lead-free solder has introduced a new set of process parameters when setting up wave solder equipment for effective soldering. Determining the proper flow characteristics of the solder wave for adequate hole fill is an essential step in achieving a reliable process. A variety of solder waves exist in the industry; each with advantages and disadvantages when performing lead-free wave soldering. One way to ensure adequate hole-fill is by increasing contact time at the Chip Wave.