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Electro-Galvanized Steel VS Hot Dipped Galvanized Steel

Electro-Galvanized Steel VS Hot Dipped Galvanized Steel

  • 2022/11/09

The world galvanized sheet market is booming and production is developing rapidly. According to the production method, galvanized sheet can be divided into hot-dip galvanized sheet and electro-galvanized sheet.

 

Hot-dip galvanizing and electro-galvanizing not only have different coating formation mechanisms, different production processes, but also different product properties and uses. The following article will specifically introduce the difference between galvanized sheet and hot-dip galvanized sheet.

 

Electrogalvanization

The zinc coating is applied to the steel by an electrodeposition process. This process applies a protective coating of very uniform thickness to both sides of the steel. Electrogalvanizing begins by immersing the raw metal in an electrolytic solution. A charged anode consisting of pure zinc was placed in the solution. Electricity flows from the zinc anode through the solution and then into the metal cathode. Tiny zinc particles dissolve in the electrolyte and bond to the metal surface. This results in a material with a thin protective coating, but a glossy finish that is aesthetically appealing.

 

Hot dip galvanization

Hot dip galvanizing requires cleaning the raw metal in a caustic solution to remove impurities and scale from the surface. Rinse material and apply non-oxidizing flux compound. Immerse the metal in a bath of molten zinc at a temperature between 443 and 465 degrees Celsius (830 and 870 degrees Fahrenheit). A chemical reaction between zinc and iron in the metal bonds a layer of pure zinc to the outer surface of the metal. Hot-dip galvanizing produces a strong, thick coating, but usually has a dull gray finish.

 

Advantages

Hot-dip galvanized products eg.astm a677 products have the advantages of thick zinc layer, good corrosion resistance, beautiful appearance, favorable for subsequent processing, low production cost, and reduced environmental pollution.

 

Electrogalvanizing has the advantages of good processability, good weldability and coating, good surface quality, and does not change the mechanical properties of the original plate during the production process.

 

WanJuan Steel is ready to meet your steel needs with a wide range of galvanized steel flat sheet flat and coil products.

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