What are the uses of hot dip galvanizing and electro galvanizing trunking?

Electrogalvanizing, commonly known as cold galvanizing, is the use of electrochemical methods, zinc ingots as the anode, zinc atoms lose electrons and become ionic states to dissolve into the electrolyte, and steel strip as the cathode, zinc ions on the steel strip get electrons reduced into zinc atoms deposited on the surface of the steel strip to form a coating.

Hot-dip galvanizing is to pickle the steel pipe first, in order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in an aqueous solution of ammonium chloride or zinc chloride or ammonium chloride and zinc chloride mixed in an aqueous solution tank, and then sent to the hot-dip plating tank.

There are many electrogalvanized chemical industries, which are suitable for small parts; Hot-dip galvanizing is generally used in power equipment and components, and is suitable for large components and equipment.

1.Hot-dip galvanizing: the zinc layer is thick, the corrosion resistance is strong, and the highest is high.

Hot-dip galvanizing process: the iron parts are cleaned, then solvent treated, dried and immersed in zinc liquid, iron and molten zinc react to form an alloyed zinc layer, the process is: degreasing - water washing - pickling - plating - drying - hot-dip galvanizing - separation - cooling passivation.

2.Electrogalvanizing: The zinc layer is thin, the corrosion resistance is poor, and the corrosion resistance is low.

Electrogalvanizing process: chemical degreasing, hot water washing, water washing, electrodegreasing, hot water washing, water washing, strong corrosion, water washing, electrogalvanized ferroalloy, water washing, water washing, light out, passivation, water washing, drying.

The models of galvanized trunking are: trough type, tray type, ladder type.

<>There are seven thicknesses of galvanized trunking: non-national standard), non-national standard), non-national standard), national standard), national standard), national standard), national standard), national standard), national standard).

Generally, the thickness of galvanized trunking and galvanized tray is common for different specifications.

The commonly used specifications of galvanized trunking are:

50mm*50mm

50mm*100mm

100mm*100mm

100mm*200mm

100mm*150mm

100mm*300mm

The difference between hot-dip galvanized trunking and electro-galvanized trunking is mainly due to the different production processes, hot-dip galvanized trunking is passed through the solution of the immersion galvanizing pot, and the electro-galvanized trunking is obtained through electrode reaction.

The hot-dip galvanized coating is thicker and has strong anti-corrosion function. The zinc layer of electro-galvanized (can be installed indoors and outdoors) is brighter than that of hot-dip galvanizing, but the zinc layer is thinner and the rust resistance is poor. (Generally used in a dry indoor environment).

The corrosion resistance of hot-dip galvanized trunking is better than that of galvanized trunking, because the thickness of hot-dip galvanized coating is thicker than that of galvanized coating, and its anti-rust ability is much better.

1.Technological differences.

Hot-dip galvanized trunking.

Hot-dip galvanizing, also known as hot-dip galvanizing, is to melt the zinc ingot at a high temperature, put in some auxiliary materials, and then immerse the metal structural parts into the galvanizing tank, so that a layer of zinc is attached to the metal components. The advantage of hot-dip galvanizing is that it has strong anti-corrosion ability, and the adhesion and hardness of the galvanized layer are better. The disadvantage is that it is high, requires a lot of equipment and space, the steel structure is too large and not easy to put into the galvanizing tank, the steel structure is too thin, and the hot dip is easy to deform.

Zinc-rich coatings generally refer to anticorrosive coatings containing zinc powder. Zinc-rich coatings on the market contain 1.

Material preparation, pickling, washing, solubilization, hot-dip galvanizing, cooling, passivation, cleaning, sorting, re-inspection, packaging, warehousing.

Galvanized trunking. Galvanizing, also known as electrogalvanizing, is the process of using electrolysis to form a uniform, dense and well-formed metal or alloy deposition layer on the surface of the workpiece.

Compared with other metals, zinc is a relatively inexpensive and easy to coat metal, which is a low-value anti-corrosion electroplating layer, which is widely used to protect steel parts, especially against atmospheric corrosion, and for decoration. Plating technologies include slot plating (or hang plating), barrel plating (suitable for small parts), automatic plating and continuous plating (suitable for wire and strip).

2.Antisepsis. The cost of hot-dip galvanizing trunking treatment is low, and the cost of hot-dip galvanizing and rust prevention is lower than that of other paint coatings.

The hot-dip galvanized surface treatment not only has the characteristics of electro-galvanized corrosion resistance, but also contains a zinc-iron alloy layer. It also has a strong corrosion resistance, which cannot be compared with ordinary electrogalvanized trunking. Therefore, hot-dip galvanizing surface treatment is especially suitable for use in various strong acid-alkali mist and other strong corrosive environments.

The steel cable tray engineering design code CECS31 91 is the standard cable tray width and standard thickness.

The width of the cable tray < 100 The standard thickness needs to reach 1mm100 The width of the cable tray < 150 The standard thickness < 150 The standard thickness of the cable tray 400 The standard thickness of the cable tray < 800 The standard thickness of the cable tray < 2mm800 The standard thickness of the cable tray 1200 The standard thickness needs to be reached.

The design and production standards of hot-dip galvanized trunking should meet the requirements of "JBT10216-2013 Cable Tray for Electronic Control and Power Distribution".

You should call the line duct JB T9660-1999 line trunking.

1. It has a thicker dense pure zinc layer covering the steel surface, which can avoid the contact between the steel matrix and any corrosive solution.

Protects the steel substrate from corrosion. In the general atmosphere, a thin and dense layer of zinc oxide is formed on the surface of the zinc layer, which is difficult to dissolve.

In water, it plays a certain protective role in the steel matrix. If zinc oxide and other components in the atmosphere form insoluble zinc salts, it is anti-corrosion.

With more ideal. 2. It has an iron-zinc alloy layer, which is dense and has unique corrosion resistance in the oceanic salt spray atmosphere and industrial atmosphere.

3. Due to the firm bonding, zinc-iron is miscible and has strong wear resistance. 4. Since zinc has good ductility, its alloy layer is similar to steel.

The base adheres firmly, so hot-plated parts can be formed in various ways, such as cold punching, rolling, drawing, and bending, without damaging the plating.

5. After hot-dip galvanizing of steel structural parts, it is equivalent to an annealing treatment, which can effectively improve the mechanical properties of the steel matrix and eliminate the forming and welding of steel parts.

The stress is conducive to the turning of steel structural parts.

6. The surface of the hot-dip galvanized parts is bright and beautiful.

7. The pure zinc layer is the most plastic galvanized layer in hot-dip galvanizing, and its properties are basically close to pure zinc and have ductility, so it is flexible.

Wiring duct, also known as wiring duct, wiring duct, and line duct (varies from place to place), is an electrical appliance used to standardize the arrangement of power cables, data cables and other wires, and fix them on the wall or ceiling. According to the different materials, the trunking is divided into a variety of types, commonly used are environmentally friendly PVC trunking, halogen-free PPO trunking, halogen-free PC ABS trunking, steel and aluminum and other metal trunking, etc.

The difference between metal trunking and cable tray: cable tray is used to lay power cables and control cables, and metal trunking is used to lay wires and communication cables. The bridge is relatively large, and the trunking is relatively small.

The bending radius of the bridge is relatively large, and most of the trunking is bent at a right angle. The span of the bridge is relatively large, and the trunking is relatively small; The fixing and installation methods are different.

<>In some places, the bridge is not covered, and the trunking is almost all closed with a cover. The trunking is used for wiring wires, and the tray is used for routing cables. The use environment is different, the trunking is often not able to be used in the open air, while the bridge can.

Hot-dip galvanized metal trunking thickness standard (2022 edition).

The thickness standard of hot-dip galvanized metal trunking refers to the "Technical Specification for Steel Cable Tray Engineering Technical Specification T CECS31-2017" issued by China Engineering Construction Association

Hot-dip galvanized metal trunking tray type trough thickness standard:

The width of the hot-dip galvanized trunking is 300 mm, the thickness of the groove body needs to reach mm, and the thickness of the cover plate needs to reach mm.

300 mm Metal trunking width b 500 mm, groove thickness to reach, cover plate thickness to reach mm.

500 mm The width of the metal trunking b is 800 mm, the thickness of the trough body needs to be reached, and the thickness of the cover plate needs to be reached to mm.

800 mm, 1000 mm, the thickness of the groove should reach more than millimeters, and the thickness of the cover plate should reach more than millimeters.

mm = millimeter).

<> hot-dip galvanized metal hot-dip galvanized wire duct ladder national standard thickness standard:

150 mm width b 300 mm, trunking thickness to mm, rungs to mm, cover plate thickness to mm.

300 mm Width B 500 mm, trunking thickness to mm, rungs to mm, cover plate thickness to mm.

500 mm width b 800 mm, trunking thickness to mm, rungs to mm, cover plate thickness to mm.

1000 mm, hot-dip galvanized trunking ladder thickness side plate needs to reach mm, rungboard thickness needs to reach mm, cover plate thickness needs to reach mm.

mm = millimeter).