PCB tinning: Difference between revisions
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This is a simple (acid bath) method for tinning your DIY PCBs. | This is a simple (acid bath) method for tinning your DIY PCBs. The tin layer prevents the copper from oxidising, plus it looks nice. | ||
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Dispose of the solution properly. | Dispose of the solution properly. | ||
=Credits= | =Credits= | ||
The idea for this came from Jo Grys (frgmnt) in Berlin. He uses this method and provided a link to Robert Gawron's article: https://robertgawron.blogspot.com/2016/04/galvanic-pcb-tinning-by-using-home-made.html | The idea for this came from Jo Grys (frgmnt) in Berlin. He uses this method and provided a link to Robert Gawron's article: https://robertgawron.blogspot.com/2016/04/galvanic-pcb-tinning-by-using-home-made.html | ||
Revision as of 17:10, 3 April 2019
This is a simple (acid bath) method for tinning your DIY PCBs. The tin layer prevents the copper from oxidising, plus it looks nice.
Materials
- Thiourea (Thioharnstoff) – 12,5 grams
- Tartaric acid (Weinsäure) – 8,8 grams
- Tin(II) chloride (Zinn(II)chlorid) – 1,3 gram
- Tap water – up to 250 ml
You can get the chemicals in a chemist's shop, a good source is Gehrig, Lucerne: http://www.gehrig-ag.ch/content/index.php/werkstoffe/chemikalien
Tools
- Beaker or flask (graduated) to mix the ingredients
- Small weighing scale
- A magnetic stirrer is handy...
- Tray (tupper)
How to
The substances are irritating, use gloves.
- Pour water in the beaker
- Weigh and add the chemicals one by one while stirring
- When everything has dissolved, pour the solution in the tray
Clean the PCB before tinning. Remove any oxide on the copper using a soft abrasive sponge or polishing paste.
Leave the PCB in the solution for a few minutes. The longer, the thicker the tin layer will become.
Rinse and dry.
Dispose of the solution properly.
Credits
The idea for this came from Jo Grys (frgmnt) in Berlin. He uses this method and provided a link to Robert Gawron's article: https://robertgawron.blogspot.com/2016/04/galvanic-pcb-tinning-by-using-home-made.html