Water-soluble scaling powder for lead-free solder of tin silver zinc series
A lead-free solder and flux technology, used in welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems of lack of activation and protection, easy oxidation, and insufficient wetting ability.
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example 1
[0017] Diethylamine Hydrochloride 22
[0018] Glycerin (glycerol) 20
[0019] Diethylene glycol-diethyl ether 5
[0020] Hydrogenated castor oil 1
[0021] Benzimidazole 0.1
[0022] Phenolic resin 0.5
[0023] Deionized water 51.4
example 2
[0025] Dimethylamine hydrochloride 15
[0026] Glycerin (glycerol) 5
[0027] Diethylene glycol butyl ether 7
[0028] Hydrogenated castor oil 2.5
[0029] Benzimidazole 0.9
[0030] Modified cellulose (methyl cellulose) 0.1
[0031] Deionized water 69.5
[0032] The effect after welding is as figure 2 shown.
[0033] Adopting ethyl cellulose or hydroxymethyl cellulose instead of methyl cellulose in the above examples has the same effect.
example 3
[0035] Dimethylamine 0.1
[0036] Glycerin (glycerol) 15
[0037] Hexylene glycol 8
[0038] Hydrogenated castor oil 0.1
[0039] Mebenzimidazole 2
[0040] Methylal 2.3
[0041] Deionized water 72.5
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