2021-11-04 771
Step 1: appearanceTo judge whether the copper pipe is good or bad, first look at the inside and outside of the copper pipe. Generally, it should be clean, bright, no obvious oxidation discoloration, no sand holes, pinholes, cracks, peeling, bubbles, black inclusions, green rust, bumps, mold
2021-11-04 733
Waste household appliances contain a large number of copper materials, which mainly exist in all kinds of wires, condensing tubes, strips, electrical ideas, circuit boards and electronic components. Almost all kinds of copper materials are used in household appliances and electronics industry, a
2021-11-04 724
1、 Source of copper:Chalcopyrite, chalcocite, hematite and Malachite are important copper deposits in nature. After the sulfide ore is calcined, it is melted with a small amount of silica and coke to obtain crude copper, then reduced to bubble copper and electrolytic refined to obtain coppe
2021-11-04 735
Copper antirust agent is a new passivator with volatile organic solvent as carrier. After copper is placed in this solution for a specific time, it can quickly form a thin passivation film on the surface of the material. Copper antirust agent can effectively resist the corrosion of copper caused
2021-11-04 717
At present, seamless aluminum pipe is a kind of material that has attracted more attention. Compared with slotted aluminum pipe, it has specific advantages. Then, what are its advantages after all? Let's learn about the advantages of seamless aluminum tube. I hope we can know what's diff