Quality appraisal of solder wire回收锡丝, solder wire is an indispensable material in daily life, recycling waste tin. Like welding precision instruments, meters, etc., all need it. And now a lot of solder suppliers pass off inferior goods as good ones, only 35-degree tin wire is sold as more than 40 degrees. How to identify solder wire has become the most distressing thing for people outside the industry. Below, according to our company's experience, we will introduce to you how to identify good solder wire.
1. Look at the manufacturer, don't buy randomly, there must be a formal mark, production license, etc. Don't be greedy for cheapness. In short, seek more experience.
2. Observe: People who are not professionals can only judge by looking at the solder joints to distinguish the quality and color of the solder. It's hard to tell the difference between 35-degree and 40-degree solder. The top of the 40-degree solder joint is only a small part white, the bright part around accounts for 70%-80% of the entire solder joint; while the top of the 35-degree solder joint is 60%-65% white, the bright part around accounts for 35%-40% of the entire solder joint; the top of the 30-degree solder joint is 80% white, with only the bottom edge around being bright; the 45-degree solder joint is basically all bright, with only 5%-10% of the top being white.
3. It's best to try using it. Just try the solder wire on the circuit, see if the solder joints after welding are clean and shiny. Those with high lead content have a higher melting point, and the solder joints come out white, and so on to judge. [http://www.xihuishou.com]