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In this work, an activator system used for no-rosin lead-free solder paste was prepared by compounding with 5-Sulposalicylic acid dehydrate and an organic which restrains the over-quick release of the activator. The composition of the active system was studied by thermal gravimetric analysis. Additional, characterizations of the solder paste with various formula such as viscosity, wettability and...
The wettability and corrosiveness of some organic acids were tested to choose an appropriate activator. Then orthogonal design method was used to determine the proportion among the components of the activator. At last a certain amount of water-white rosin was added to further optimize the dispensation. The final soldering flux for Sn-0.7Cu welding wire caters to the demands of welding process such...
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