Characterization of nitrogen-blanketed wave soldering reactions using thermal analysis
摘要:
Thermal analysis techniques have been employed to elucidate the mechanism of low solids soldering flux activation. Metal oxides (SnO, PbO and PbO2) are converted to carboxylate salts, which are displaced in the solder wave, rendering a solderable metal surface. Neither of the activators tested, namely succinic acid and adipic acid, react with SnO2 at soldering wave temperatures and therefore cannot yield a solderable surface when SnO2 is present. Further, adipic acid reacts with SnO to form a salt that can decompose to cyclopentanone, so the preheating of the printed circuit board must be carefully controlled to yield a solderable surface.
OZIMINA, D.;KAJDAS, C., ASLE TRANS, 30,(1987) N 4, 508-518
作者:OZIMINA, D.、KAJDAS, C.
DOI:——
日期:——
Characterization of nitrogen-blanketed wave soldering reactions using thermal analysis
作者:M. L. Patterson、M. H. Hahn
DOI:10.1007/bf02549214
日期:1995.6
Thermal analysis techniques have been employed to elucidate the mechanism of low solids soldering flux activation. Metal oxides (SnO, PbO and PbO2) are converted to carboxylate salts, which are displaced in the solder wave, rendering a solderable metal surface. Neither of the activators tested, namely succinic acid and adipic acid, react with SnO2 at soldering wave temperatures and therefore cannot yield a solderable surface when SnO2 is present. Further, adipic acid reacts with SnO to form a salt that can decompose to cyclopentanone, so the preheating of the printed circuit board must be carefully controlled to yield a solderable surface.