Cleaning-free solid-state scaling powder for aluminum low-temperature soldering and preparing method
A no-cleaning and soldering technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of poor electrochemical corrosion resistance of low-temperature active solder joints, fast tinning speed, low moisture absorption, etc. Achieve the effect of improving the reliability of solder joints, promoting spreading, and increasing the life of solder joints
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Embodiment 1
[0048] A no-clean solid flux used for aluminum low-temperature soldering, the raw material formula components are as follows:
[0049]
[0050] Preparation method: prepare triethylenetetramine, diethanolamine and alcohol as an organic amine alcohol solution with a weight ratio of 1:2, and prepare an acid alcohol solution with a weight ratio of fluoroboric acid, stearic acid and alcohol with a weight ratio of 1:3. Titrate the organic amine alcohol solution with an acid alcohol solution in the kettle to pH = 7 and let it stand for 24 hours; put the organic amine hydrochloride alcohol solution in a polytetrafluoroethylene evaporating dish, heat it to 135±5°C and continue at 90r / min Stir at a high speed until the alcohol and water are removed, and cool to obtain a solid mixture of triethylenetetraamine fluoroborate and diethanolamine stearate; take the above-mentioned mass fraction of organic amino acid salt in a reaction kettle and heat it to 110±5°C , add zinc oxide to the li...
Embodiment 2
[0052] A no-clean solid flux used for aluminum low-temperature soldering, the raw material formula components are as follows:
[0053]
[0054] Preparation method: prepare hydroxyethylethylenediamine, triethanolamine and alcohol as an organic amine alcohol solution with a weight ratio of 1:3, and prepare an acid alcohol solution with a weight ratio of fluoroboric acid, hydrofluoric acid and alcohol with a weight ratio of 1:5, Titrate the organic amine alcohol solution with acid alcohol solution to pH = 7 in the reaction kettle and let it stand for 48 hours; put the organic amine hydrochloride alcohol solution in a polytetrafluoroethylene evaporating dish, heat it to 135±5°C and continuously heat it for 60r Stir at a speed of 1 / min until the alcohol and water are removed, and cool to obtain a solid mixture of hydroxyethylethylenediamine fluoroborate and triethanolamine hydrofluoride; take the above-mentioned mass fraction of organic amino acid salt in a reaction kettle, and h...
Embodiment 3
[0056] A no-clean solid flux used for aluminum low-temperature soldering, the raw material formula components are as follows:
[0057]
[0058] Preparation method: hydroxydiethylethylenediamine, ethylenediamine and alcohol are prepared into an organic amine alcohol solution with a weight ratio of 1:1, and adipic acid, fluoroboric acid and alcohol are prepared into an acid alcohol solution with a weight ratio of 1:4 , Titrate the organic amine alcohol solution with an acid alcohol solution in the reaction kettle to pH = 7 and then place it for 24 hours; place the organic amine hydrochloride alcohol solution in a polytetrafluoroethylene evaporating dish, heat it to 135±5°C and continuously Stir at a speed of 80r / min until the alcohol and water are removed, and cool to obtain a solid mixture of hydroxydiethylethylenediamine adipate and ethylenediamine fluoroborate; take the above mass fraction of organic amino acid salt in the reaction kettle , heated to 110±5°C, adding zinc o...
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