Technology: Nickel-plated copper Advantage
What is copper nickel-plated copper wire? What are the advantages of nickel-plated copper wire? Nickel-plated copper wire has introduced what it? First we look at the definition of nickel-plated copper wire. Nickel-plated copper definition: through electrolysis or chemical method on a layer of nickel-plated copper wire.
Know nickel-plated copper wire definition, we are concerned that the advantages of nickel-plated copper wire: the parts with excellent corrosion resistance, abrasion resistance, weldability and high hardness, etc., to meet the requirements of parts, improve parts life.
Learn more about the nickel-plated copper wire, then we talk about the detail of the contents of nickel-plated copper introduce it.
Introduction of nickel-plated copper nickel-plated copper nickel plating method:
1, electroless nickel: Under certain conditions, the metal ions in the aqueous solution is a reducing agent, and the precipitated solid substrate surface to the process. Bath generally nickel sulfate, nickel acetate, mainly salt, hypophosphites, sodium borohydride, borane, hydrazine as a reducing agent, and then add various additives.
Electroless Nickel advantages:
(1) has a wide range of coverage, for all parts of the complex parts can be more uniform coating.
(2) than Plating far superior throwing power, can greatly reduce blind hole plating, no plating phenomenon deep inside.
(3) electroless nickel plating layer and has a much more superior to brush the corrosion resistance, abrasion resistance, weldability and uniform coating thickness, hardness advantages.
2, plating: salt solution containing the pre-metallized, the metal substrate to be plated as a cathode through electrolysis, the bath in the pre-plating metal cation in the matrix metal deposited on the surface, forming a surface coating processing method.
3. Brush: with a connection to the anode and an electrolyte to provide the required electrode plating or brush on parts as the cathode move to select plating method.
Brush advantages: Brush in recent years developed a new technology, its biggest advantage is not the plating tank, and the deposition speed. Because of its single-cylinder device, easy to operate, you can choose a variety of coatings, but also has a high bond strength, etc., so in the aviation, marine, rail, electronics and maintenance of machinery and all kinds of vehicle widely used, is the current national promotion A new technology.
Brush disadvantage: Brush the audience in many fields, such as the repair of high-volume, large area coating some of the parts, productivity is clearly not very high, but compared with the plating, brush plating coating also significantly less deep plating.
Nickel-plated copper wire introduction of nickel-plated copper wire and bare copper wire difference: the nickel-plated copper wire and bare copper wire and electrical properties on temperature is almost no difference to them except that the nickel plating layer is very high stability in air Since nickel has a strong passivation capability, can quickly generate a very thin surface passivation film, resistant to atmospheric corrosion of base and certain acids, as well as nickel plating hardness is relatively high, it can improve product surface It wears on.
Nickel-plated copper nickel-plated copper wire before the introduction of the pre-treatment:
1, oil: copper wire drawing and handling, which will be coated with oil on the surface. Since it is impossible to completely remove these oil during the annealing process, it must be used prior to plating degreasing chemical degreasing and electrolytic methods, make it clean.
2, pickled: cleaning with hydrochloric acid solution, and no major on copper corrosion, the opposite can remove thin oxide film on the copper surface, and less residue left on the copper. Chemical pickling process is as follows:
(1) pickling with hydrochloric acid, hydrochloric acid and water in the ratio of 1: 2.
(2) acid at room temperature 5 ~ 10s.
Note nickel-plated copper nickel-plated copper introduce pretreatment before: each must be copper wire with hot and cold water rinse after degreasing. If cleaning is not clean, easy to wash into the soap in the formation of fatty acid, hamper pickling process. Copper pickled, at least through two cold rinse, before the plating tank to go through a distilled water (or deionized water), and dried in order to avoid the impurities into the plating tank.
Reason nickel plated copper wire introduction of nickel-plated copper wire annealing: nickel plated copper wire has been pulled, the plastic lower, tensile strength and hardness increased significantly. Due to the need on product performance, nickel-plated copper wire must be annealed.
Introduction of nickel-plated copper nickel-plated copper wire annealing method: carried by tank furnace and bell-type furnaces. Although nickel recrystallization temperature 530 ~ 660 ℃, but the recrystallization temperature of copper is 230 ℃, thus nickel plated copper annealing temperature is not too high. In the tank furnace annealing temperature of 2500 ℃, bell-type annealing furnace temperature is 330 ~ 350 ℃. A nickel-plated copper disk arrangement in an annealing furnace, it is necessary that each plate is heated uniformly, not to rapid warming, in order to avoid the occurrence of nickel-plated copper wire bonding, and lose their luster.
Introduction of nickel-plated copper nickel-plated copper wire cable for the purpose of:
1, increasing the nickel plating copper plating smooth and dense surface level, because after rapid ordinary nickel and nickel-plated copper surface was not smooth color, surface color cable make it smooth.
2, increase productivity and reduce costs.
3, to facilitate the production of small diameter nickel-plated copper wire, thin copper wires prone to breakage during direct nickel plating.
Uses and production processes tinned flat copper wire
Tinned wire bare copper wire test