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How to judge the quality of solder wire ?

Views : 94
Update time : 2022-11-09 18:15:43
If the solder joint is relatively white, it means that the lead content of the solder wire is relatively large, and the quality of the solder wire is poor. For example, only a small part of the solder joint of the 40 degree solder wire is white in the middle, and the surrounding brightness accounts for 70%-80% of the entire solder joint; while the whitening of the solder joint of the 35 degree solder wire accounts for 60%-65% of the entire solder joint. , the surrounding light accounts for 35%-40% of the entire solder joint;
The whiteness of the solder joint of 30 degree solder wire accounts for 80% of the entire solder joint, and only the bottom edge of the surrounding area is lit; while the solder joint of 45 degree solder wire is basically fully lit, only the top accounts for 5% of the entire solder joint- 10% whitish. Therefore, the larger the white area in the middle of the solder wire, the worse the quality of the solder wire.
According to professional technology, it is necessary to use a professional spectrometer to detect, and the accuracy can reach 0.001%. Smoke, spatter, residue, and brightness are also criteria for judging the quality of solder wire.
Therefore, when selecting solder wire, it is best to use a regular solder manufacturer with good reputation to supply it.
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