The purpose of PCB galvanizing is to prevent steel objects from being corroded, improve the corrosion resistance and service life of steel, but also make the product increase the decorative appearance, steel with the growth of time will be weathering, water or soil corrosion. Domestic annual corrosion of steel almost accounts for one tenth of the total amount of steel, so in order to protect the service life of steel or its parts, generally using PCB galvanizing to iron and steel processing.
Because zinc is not easy to change in dry air, and in the humid environment * can produce a basic zinc carbonate film, this film can protect the internal parts and not be damaged by corrosion, even if the zinc layer is damaged by some factors, zinc and steel after a period of time will form a microbattery, and the steel matrix as the cathode and protected.
Zinc is a metal with a bluish-white sheen. Atomic number 30, relative atomic mass 65.4, brittle and hard, melting point 419.4 ℃, boiling point 907℃, valence +2, relative density 7.1. Zinc is stable in dry air. Zinc is an amphoteric metal, acid, alkali will react to release hydrogen. It also reacts with hydrogen sulfide. A basic zinc carbonate film is formed in water or moist air to protect the underlying layer from corrosion.
Galvanized on iron, because of its negative potential, is anodic coating, has good electrochemical protection. Therefore, galvanizing (plus passivation with chromate after plating) is widely used to prevent the corrosion of ferrous metals. It is widely used in electroplating electrical parts, mechanical hardware, building hardware and industry.
Zinc is mainly used in industry for electroplating, hot dip plating, battery industry and manufacturing alloys (such as brass).
Summary PCB electrogalvanizing has the following characteristics:
1, good corrosion resistance, combined with fine uniform, not easy to be corrosive gas or liquid into the interior.
2, because the new layer is relatively pure, whether in acid or alkali environment is not easy to be corroded. Protect the steel body effectively for a long time.
3. After chromic acid passivation, various colors can be used, which can be selected according to customers' favorite. Galvanized is beautiful and generous and decorative.
4, zinc coating has good ductility, in a variety of bending, handling impact will not easily fall.
In the era of industrialization surplus, circuit board manufacturers in particular, choose a suitable Circuit board manufacturers is very important! In the industry, large companies such as Shennan, Shenlian and Jingwang are doing well. Their positioning is clear and their customer groups are very stable. Generally, they do not accept factory orders, because they are not short of orders at all.
However, most of the factories in the industry are not clearly positioned, what single is accepted, the result of what single is not good! Do not do well does not matter, reposition, do fine do special as a way out. But most of the boss don't think so, we think they pick up not only, because their strength is not enough, not enough equipment......
In fact, regardless of the size of the market, sometimes operating quality is more important than operating scale! PCB market is very big, you focus on a certain field, do fine, still can be bigger and stronger!
Shenzhen Fanyi Technology Development Co., Ltd. is such a circuit board company! We focus on connector RJ45Type C field for more than ten years, research RJ45 PCB board and Type C PCB board manufacturing difficulties, in 2007, there is no computer V-CUT period, can control the V-CUT tolerance within +/-0.15mm. When everyone thinks the single side welding ring ** meets 0.3mm, they have achieved 0.05mm!
Therefore, PCB proofing, production which good? Of course, choose Dongguan Qixiang Electronic Co., LTD., because Qixiang circuit has a team to study the inherent characteristics of each electronic industry products, according to the characteristics of different products, different production processes.
At present, there are too many circuit board factories and they are very miscellaneous. Electronic manufacturers to choose a wide range, and it is difficult to choose the right manufacturers. A little mistake, mismatched circuit board manufacturers will bring you a lot of annoyance, and even fatal functional problems, let you not hurt! Of course, the circuit board manufacturers are also many, such as Shennan, Shenlian, Jingwang these big factories, but the general large, Circuit board factory is not just a factory, it is already a platform! It is not short of orders, will not choose to cooperate with you!