Measurements of the solders surface tension values

摘要: The knowledge of actual value surface tension is important for the understanding to several soldering aspects, such as wetting, joint shape, fluxing action and, particularly, quantification solderability testing. High required wave soldering. Values are mainly caused by measurement conditions (temperature, ambient — air, inert atmosphere different composition etc.). For our we used one evaluation methods known wetting balance method, which measure force. Wettability tester (sometimes called a meniscograph) was placed in box with possibility reduce oxygen concentration. carried out on two types solders (lead and lead free) non-wetting specimen (teflon, nonstick cylinder). We have measured influence temperature reduced concentration change force related tension.