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Warehouse racking surface treatment

Warehouse racking surface treatment

  • Thursday, 16 January 2025
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We are embracing the 2025, wishing our customers,vendors,partners, staff,and everyone in between a very happy holiday season! 


Today let us talk about the racking surface treatment, there are two surface treatment methods for steel racks: spraying and galvanizing. Spraying is very common in warehouse racking industry, so let us focus on the galvanizing treatment this time.


Galvanizing is divided into hot-dip galvanizing and cold-dip galvanizing. 

Let's learn the difference between hot-dip galvanizing and cold-dip galvanizing.


1. Different processing processes

Hot dip galvanizing is a metal surface treatment process. The surface of the metal workpiece to be galvanized is first cleaned and activated, and then immersed in molten zinc liquid. After the reaction between iron and zinc, a layer of zinc with good adhesion is plated on the surface of the metal workpiece.


Cold galvanizing is a metal surface treatment process. It uses electrolytic equipment to remove oil and pickle the pipe fittings, then put them into a solution composed of zinc salts, and connect them to the negative pole of the electrolytic equipment. A zinc plate is placed opposite the pipe fittings, connected to the positive pole of the electrolytic equipment and powered on. The directional movement of the current from the positive pole to the negative pole will deposit a layer of zinc on the pipe fittings. Cold galvanized pipe fittings are processed first and then galvanized.


2. Hot-dip galvanizing is a chemical reaction, while cold-dip galvanizing is a physical reaction.


3. The galvanized zinc layer after hot-dip galvanizing is thicker, generally 30-60 microns, while the galvanized zinc layer after cold-dip galvanizing is thinner, generally within 5-30 microns.


4. The surface appearance after processing is different. Hot-dip galvanizing has a thicker zinc layer, so the surface looks "rough, not smooth, and uneven"; while cold-dip galvanizing has a thinner zinc layer, so the surface is smoother.


5. The manufacturing cost of hot-dip galvanizing is higher than the cost of cold-dip galvanizing.


From above you will know how to choose the surface treatment for your metal storage systems.

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