Copper wire has solder and solder without the demarcation line break
Tin dipping temperature, i.e. the temperature you don't tin is too high, not too long time dipping tin bronze layer will be formed, otherwise relatively thick, more like bronze wire, more easily broken. Low temperature, not only to save energy, the boss happy, is environmentally friendly, lead steam evaporated tin less workers being exploited at the same time, can be slightly less toxic, favorable to the satisfaction of all, harmonious.
Do not use too thin Multi Strands, the line is too thin, the bronze layer formed after the whole became a bronze line, easy to break. But with thin wires, you can save costs, and your boss will suffer from high blood pressure and angina...... Well, just look at the following two.
Don't talk nonsense, I know the question.The reason is that when the copper wire is combined with the solder, the alloy layer is formed on the bonding surface of the two metals - the bronze layer. I think we all know that the bronze, both hard and brittle, impregnated with a copper tin because of high strength, not easy to break; without a tin dipping, because copper flexible, is not easy to break; then, just in a combination of broken, because the bronze layer has been formed here the lack of strength and lack of supporting thick tin layer.
