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Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.

Electrolytic solder

Joe S


Electrolytic solder | 20 March, 2001

When someone has a concern about solder being electrolytic, what is their concern?

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Electrolytic solder | 20 March, 2001

I dunno.:


Of or relating to electrolysis. Produced by electrolysis. Of or relating to electrolytes.


Chemical change, especially decomposition, produced in an electrolyte by an electric current. Destruction of living tissue, especially of hair roots, by means of an electric current applied with a needle-shaped electrode.

electrolytic n : a fixed capacitor consisting of two electrodes separated by an electrolyte


A chemical compound that ionizes when dissolved or molten to produce an electrically conductive medium. Physiology. Any of various ions, such as sodium, potassium, or chloride, required by cells to regulate the electric charge and flow of water molecules across the cell membrane.

Electrolytic \E*lec`tro*lyt"ic\, Electrolytical \E*lec`tro*lyt"ic*al\, a. [Cf. F. ['e]lectrolytique.] Pertaining to electrolysis; as, electrolytic action. -- E*lec`tro*lyt"ic*al*ly, adv.

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Electrolytic solder | 20 March, 2001

Electroplating [electrolytic] and dipping [HASL] are the two methods for applying solder coatings to features on boards. Disadvantages of electroplating lead / tin are: * "Weak knees" created at the edge of plated through holes. [I used to get weak knees when Carol Albano walked by me, but that's a different story. I wonder where she is now.] * Current density requires careful control. Tin composition decreases as the current density decreases. This produces lead-rich solder, which is less solderable. * Plating is porous and needs to be fused [reflowed]. Fusing this plating creates a domed surface on pads. * Difficult to control plating thickness, especially when thick coatings are required.

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Electrolytic solder | 21 March, 2001

Could they have meant eutectic?

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