Hot-dip galvanizing reacts molten metal with an iron matrix to produce an alloy layer, thereby combining the matrix and the coating. Hot-dip galvanizing is to pickle the steel parts first. In order to remove the iron oxide on the surface of the steel parts, after pickling, they are cleaned in an aqueous solution of ammonium chloride or zinc chloride or a mixed aqueous solution of ammonium chloride and zinc chloride. , and then sent into the hot dip plating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion, and long service life.
Hot-dip galvanizing is also called hot-dip galvanizing. It melts the zinc hot-dip ingot at high temperature, puts in some auxiliary materials, and then immerses the metal components in the galvanizing tank to attach a layer of zinc to the metal components. The advantage of hot-dip galvanizing is its strong anti-corrosion ability and good adhesion and hardness of the galvanized layer. The disadvantages are that the price is relatively high and requires a large amount of equipment and space. The steel structural parts are too large and difficult to put into the galvanizing tank. The steel structural parts are too weak and are easily deformed during hot dip. Zinc-rich paint generally refers to anti-corrosion paint containing zinc powder. The zinc-rich paint on the market contains zinc content of 1.
Hot dip galvanizing is the pickling of steel parts. In order to remove the iron oxide on the surface of the steel, after pickling, it is cleaned through an aqueous solution of ammonium chloride or zinc chloride or a mixed aqueous solution of ammonium chloride and zinc chloride. Then the steel structure is usually Put it into zinc liquid at about 500℃ for rust removal treatment, so that the zinc layer adheres to the surface of the steel structure.
Advantages of hot dip galvanizing:
Hot-dip galvanizing is one of the effective methods to improve the resistance of steel to atmospheric corrosion because of its excellent coating performance and long service life.
There are many common quality defects on the surface of the hot-dip galvanized layer, such as missing plating, striped feather white patterns, ultra-thick coating, rough, gray, tear streaks, turtle cracks, crystal-like raised lines, "white rust", etc. The influencing factors There are many and it is relatively difficult to control.
In this regard, we can start by strengthening process control, supplemented by necessary process measures, to improve the surface quality of hot-dip galvanizing.
1. Low processing cost: The cost of hot-dip galvanizing for rust prevention is lower than that of another paint coating
2. Durability: The galvanized layer is metallurgically combined with the steel and becomes part of the surface of the steel, so the durability of the coating is better
3. Comprehensive protection: Every part of the electroplating can be galvanized, even in recesses, sharp corners and hidden places, it can be fully protected
4. Saving time and labor: Saving labor is definitely the unique advantage of this type of processed products. Simply put, hot-dip galvanizing products are more convenient and faster than other coating methods when galvanizing. In addition, it can also save later installation and flashing time.
5. Simple and convenient inspection: The inspection of this type of product can be said to be very simple. Compliance of such products can generally be checked through visual and surface testing.
Uses of hot dip galvanized products
Hot-dip galvanized products have excellent corrosion resistance, are environmentally friendly and pollution-free, have stable product performance and are easy to weld. They have been widely used in the following aspects: