Copper knowledge: What is tinned brass wire

What is tinned brass wire? What are the applications of tinned brass wire? To know these problems, let's first look at the content of brass tinning. Brass tin plating belongs to chemical plating, tin coating is bright silver white, can increase the weldability and decoration of brass, does not affect the electrical conductivity, can be used in electronics industry, furniture, food packaging and other aspects. Anti-oxidation, increase the beauty of copper workpieces, products non-toxic no heavy metals, salt spray test more than 45 hours without rust. No electroplating equipment, just soak, convenient and simple, can be thick tin plating.

What's tin-plated brass wire? Tin-plated brass wire is a wire harness manufacturing process in which a layer of tin is plated on the surface of a wire conductor to improve the performance of the wire. Tin forms tin dioxide films in the air to prevent further oxidation, and tin and halogens can also form films with similar effects. Thus it has both good corrosion resistance, and a certain strength and hardness, good formability and easy welding, the tin layer is non-toxic and tasteless, can prevent iron from being dissolved into the package, and the surface is bright, printed pictures can beautify the goods.

What is tinned brass wire? Tinned brass wire applications

Tin-plated brass wire is mainly used in electronic components lead wire, communication cable, light-emitting diode, bakelite skeleton (BOBBIN), high and low frequency transformer pin holder, relay foot, micro motor, computer pin, connector, various guide pin and so on.

The application of tinned brass wire in automobiles: To a certain extent, the risk of automobile fire can be reduced. Putting on the 'tin coat' to the wire harness is like equipping the wire harness with a 'cooling device', which effectively improves the fire resistance of the wire harness.

What is tinned brass wire? Principle of tin-plated brass wire

Copper wire is widely used in wire harnesses because of its high cost performance. However, using bare brass wire as a wire harness will affect the normal operation and service life of the wire harness because the brass is easy to be oxidized and corroded by humid air. A waterproof 'tin coat' is plated on the outside of the brass wire, that is, the tin-plated brass wire. The effect of the tin coating on the electrode of the brass core can effectively improve the oxidation resistance of the wire harness and extend the service life of the brass wire harness in a high salinity environment. The tin layer hardness of tin-plated copper wire is lower, and the processing performance is better than that of bare copper wire. The contact between the brass wire harness terminal and the wire conductor is fuller, the contact resistance is small, and the temperature rise of the brass wire harness terminal is slower.

The above introduces the relevant content of 'What is tinned brass wire', and we will also take a look at the relevant content of brass tinning. Brass tinning process:

Copper pieces of oil removal - - two pickling and polishing bath -- -- -- -- -- - chemical tin -- -- -- -- -- three water - with cold wind blow dry, testing in a timely manner.

Chemical tin plating: Add 8~10g in tin plating water

After the tin plating additive is used, the tin sinking temperature is normal temperature ~80℃, the tin sinking time is 15 minutes, and the plating process should be lightly stirred or gently turned the workpiece. The thickness of the tin layer can be increased by repeated soaking.

Precautions for brass tinning:

The copper workpiece after micro-etching should be put into the tinning liquid in time after washing to prevent the copper surface from being oxidized again and affecting the quality of the coating.

When the tinning efficiency decreases, 1.0% tinning additive can be added, and it can continue to be used after mixing evenly.