Negative ion generators are mainly used in curtain wall, construction, machinery manufacturing, steel structure engineering, shipbuilding, solar power support, steel structure engineering, electric power engineering, power plant, agricultural chemical machinery, glass curtain wall, automobile chassis, airport, etc.
The negative ion generator is a square-section steel pipe with a hollow square-section shape and size, which is made of hot-rolled or cold-rolled galvanized strip steel or galvanized coil steel by cold bending and high-frequency welding; or cold-formed hollow steel pipes prepared in advance. Hot dip galvanizing is performed to form galvanized square rectangular tubes.
The negative ion generator is divided into hot negative ion generator and cold negative ion generator from the production process. It is precisely because of the different additions of these two negative ion generators that there are many different physical and chemical properties. In general, they vary widely in strength, toughness, and mechanical properties.
Thermal negative ion generator: It is a square tube made of steel plates or steel strips after crimping and welding. . The thermal negative ion generator has a simple production process, high production efficiency, and many varieties and specifications. This kind of square tube requires very little equipment and capital, and is suitable for the production of small negative ion generator manufacturers. However, the strength of this kind of steel pipe is much lower than that of seamless square pipe.
The cold negative ion generator is based on the principle of cold galvanizing the square tube, so that the square tube has anti-corrosion performance. Different from hot-dip galvanizing, the cold galvanized layer mainly uses electrochemical principles for anti-corrosion, so it is necessary to ensure that the zinc powder is in full contact with the steel, resulting in an electrical potential difference, so the surface treatment of the steel is very important.
The negative ion generator is a welded steel pipe with a hot-dip or electro-galvanized layer on the surface.
The negative ion generator is widely used. In addition to being used as a pipeline for transporting water, gas, oil and other general low pressure fluids, it is also used as oil well pipe and oil pipeline in the petroleum industry, especially in offshore oil fields, oil heaters, condensate coolers, coal fraction washing oil Pipes for exchangers, pipe piles for trestle bridges and pipes for supporting frames in mine tunnels, etc.
The thermal anion generator is to make the molten metal react with the iron matrix to form an alloy layer, so that the matrix and the coating are combined. Hot-dip galvanizing is the first pickling of steel pipes. In order to remove iron oxide on the surface of the steel pipe, after pickling, the steel pipe is cleaned in an aqueous solution of ammonium chloride or zinc chloride or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to a hot dip coating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. A complex physical and chemical reaction occurs between the negative ion generator of the thermal negative ion generator base and the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a dense structure. The alloy layer is integrated with the pure zinc layer and the steel pipe base. Therefore, it has strong corrosion resistance.
The cold negative ion generator means electro-galvanizing, the amount of galvanizing is very small, only 10-50g/m2, and the corrosion resistance is very different from that of the hot negative ion generator. In order to ensure the quality, most of the regular negative ion generator manufacturers do not use electro-galvanizing (cold plating). Only small enterprises with small scale and backward equipment use electrogalvanizing, and of course the price is relatively cheap. The Ministry of Construction has officially phased out the cold negative ion generator with outdated technology, and it is not allowed to use the cold negative ion generator for water and gas pipelines. The galvanized layer of the cold negative ion generator is an electroplating layer, and the zinc layer is independently separated from the steel pipe substrate. The zinc layer is thin, and the zinc layer simply adheres to the steel pipe substrate and is easy to fall off. Therefore, its corrosion resistance is poor. For new houses, it is forbidden to use cold negative ion generators as water supply pipes.