first of all, we all know that the common purpose of hot-dip galvanizing and cold-dip galvanizing is to prevent corrosion and rust, so as to protect street lamps well. however, the process, appearance and price of hot-dip galvanizing and cold-dip galvanizing are different, and the anti-corrosion degree they can play is also different.
in fact, hot-dip galvanizing is also called hot-dip galvanizing or hot-dip galvanizing, which is a very effective anti-corrosion method. the production process of hot-dip galvanizing is to immerse the derusted steel into a molten zinc solution of about 500, so that the surface of the steel members is attached with a zinc layer, so as to achieve the purpose of anti-corrosion. there are many processes in this process, such as first pickling the finished product, then washing it with water, then adding auxiliary plating solution, drying, hanging plating, cooling, medicating, cleaning, polishing, etc.
the appearance of hot-dip galvanizing is not as good as that of cold galvanizing, but the anticorrosion performance of hot-dip galvanizing is far greater than that of cold galvanizing. its anticorrosion capacity is more than ten times of that of cold tinning, and its service life is very long. it can be used for 13 years in heavy industry area, 50 years in ocean, 104 years in suburb and 30 years in city.
relatively speaking, the price of hot-dip galvanizing is also quite expensive, which is much more expensive than that of cold galvanizing.
cold galvanizing is to use the electrolytic equipment to put the workpiece into the zinc salt solution after degreasing and pickling, and connect the negative pole of the electrolytic equipment, place the zinc plate on the opposite side of the workpiece to connect the positive pole of the electrolytic equipment, connect the power supply, use the current to move from the positive pole to the negative pole, and a layer of zinc will be deposited on the workpiece.
the appearance of cold galvanizing is very exquisite, much more exquisite than that