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What is the difference between hot-dip galvanized steel grating and cold-dip galvanized steel grating
Libere o tempo:
Jan 10,2024
Galvanized steel grating is divided into hot-dip galvanized steel grating and cold-dip galvanized steel grating, the difference between which is as follows:
Galvanized steel grating is divided into hot-dip galvanized steel grating and cold-dip galvanized steel grating, the difference between which is as follows:
Process differences:
Hot-dip galvanizing, also known as hot-immersion galvanizing, involves immersing the cleaned and pretreated workpiece into a molten zinc bath for a certain period of time, and then removing it.
Cold-dip galvanizing, also known as electrogalvanizing, involves electrolytically depositing a coating of zinc on the workpiece from a solution of zinc salts.
Difference in corrosion resistance:
Hot-dip galvanizing is a chemical process that involves immersing the steel in molten zinc under conditions of heat. The adhesion and hardness of the zinc coating are better, and the corrosion resistance is several dozen times stronger than that of electrogalvanized steel.
Cold-dip galvanizing is a physical process that generally does not require heating, and the amount of zinc deposited is small, so the zinc layer is prone to peeling off and has poor corrosion resistance.
Difference in environmental performance:
The main pollutants from hot-dip galvanizing are the spent acid from acid pickling of the workpiece. The main pollutants from cold-dip galvanizing include spent acid from acid pickling, electroplating waste solutions, spent passivation solutions, etc. Therefore, the type and quantity of pollutant emissions from cold-dip galvanizing are significantly higher than those from hot-dip galvanizing.
Difference in price:
The price of hot-dip galvanizing is higher than that of electrogalvanizing.
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