desoldering lead free solder

Discussion in 'General Electronics Chat' started by Treeman, Apr 14, 2015.

  1. Treeman

    Thread Starter Member

    May 22, 2014
    158
    15
    I have an antex xs 25 iron but cannot seem to get enough heat to desolder lead free solder. is this normal?
    do I need a bigger iron?

    lead solder no problem.
    thanks
     
  2. ian field

    Distinguished Member

    Oct 27, 2012
    4,415
    784
    RoHS solder does have a higher melting point.

    You can buy special low melting point solders to dilute the existing solder, its sold mainly to make it easier to unsolder large multi-pinned ICs.

    Make sure you don't get a surplus batch of NOS cadmium low melting solder though - cadmium is toxic.

    The iron I use is the Antex 50W TC type, its adequate for reworking RoHS solder except in winter if the room temperature gets low.

    You can dilute RoHS solder with ordinary leaded solder, but there are all sorts of regulations you can fall foul of if you're charging for repairs or selling a product in the Euro Zone.
     
    Treeman likes this.
  3. dl324

    Distinguished Member

    Mar 30, 2015
    3,250
    626
    Hi Treeman,

    What's your tip temp? Do you need to maintain RoHS compliance.
     
  4. ian field

    Distinguished Member

    Oct 27, 2012
    4,415
    784
    Whatever scale was printed on temp pot was vague to start with, and has rubbed off altogether. These days I only do hobby stuff, so no regs for me.

    The old industry standard was the Weller TCP-1 and 24V base unit. The Curie point magnetic sensor tips most common types were calibrated as 700F or 800F, most people used the 700F tips for lead/tin solder - I expect a few people might've switched to the 800F tip when RoHS came along.
     
  5. dl324

    Distinguished Member

    Mar 30, 2015
    3,250
    626
    700F should melt either type. Try adding more solder to help heat transfer. If that doesn't work, might need higher wattage iron; or your heating element might be bad.
     
  6. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,771
    971
    ^^ yep add a bit more solder.. it will help with the thermal transfer by allowing more contact from tip to solder
     
  7. Treeman

    Thread Starter Member

    May 22, 2014
    158
    15
    Thanks guys. I added solder and got there eventually. I'll buy a bigger Iron too as this is not the first time Ive nearly taken to to a pair of sidecutters to desolder! No ROHS compliance here unless by happy error.
     
Loading...