THE SIGNIFICANCE OF CONTACT ANGLE MEASUREMENTS IN SOLDERING.

Abstract

The importance of the measurements of contact angles in soldering  has been mentioned. The assessment of the spreading power of a solder  over a metallic surface involves the determinations of the contact angle  between the solder and the metal surface, and the interfacial tension. The  theoretical basis for the experimental work done on contact angles has  been critically reviewed. Mention is also made of the various fluxes used  in soldering. The need for further work involving low-melting solder  systems and proper correlation of data is dealt with briefly.