Hot Dipped Galvanized A36 Hot rolled galvanized (HDG) steel angles/mild steel angle bar/iron(Manufacturer)Q235/SS400/A36 Hot rolled

What is hot-dip galvanized pipe

Hot dip galvanized pipe is the reaction of molten metal with iron matrix to produce alloy layer, so that the matrix and the coating are combined.

Hot dip galvanizing is to first pickling the steel pipe, in order to remove the iron oxide on the surface of the steel pipe, after pickling, through ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank for cleaning, and then into the hot dip plating tank.

Hot dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. The matrix of hot dip galvanized steel pipe and the molten bath undergo complex physical and chemical reactions to form a tight zinc-iron alloy layer with corrosion resistance.

The alloy layer is integrated with the pure zinc layer and the steel pipe matrix, so its corrosion resistance is strong.

Handle design

What is galvanized coating

Galvanizing refers to the surface treatment technology of plating a layer of zinc on the surface of metals, alloys or other materials to play the role of aesthetics and rust prevention.  The main method used is hot-dip galvanizing.  

Zinc is soluble in acids and alkali, so it is called an amphoteric metal.  Zinc changes little in dry air.  In moist air, a dense basic zinc carbonate film forms on the surface of zinc.  In the atmosphere containing sulfur dioxide, hydrogen sulfide and Marine atmosphere, zinc corrosion resistance is poor, especially in the high temperature and high humidity atmosphere containing organic acid, zinc coating is easily corroded. 

The standard electrode potential of zinc is -0.76V, for the steel substrate, zinc coating belongs to the anodic coating, which is mainly used to prevent the corrosion of steel, and its protective performance is greatly related to the thickness of the coating.  The protection and decoration of zinc coating can be improved significantly after passivation, dyeing or coating with light protector. 

Our product features

The main advantages are: low treatment cost: the cost of hot dip galvanized rust prevention is lower than that of other paint coatings;  Durable: In the suburban environment, the standard hot-dip galvanized rust prevention thickness can be maintained for more than 50 years without repair;  In urban or offshore areas, the standard hot-dip galvanized anti-rust layer can be maintained for 20 years without repair;  Good reliability: the galvanized layer and the steel is a metallurgical combination, becoming a part of the steel surface, so the durability of the coating is more reliable;  The toughness of the coating is strong: the galvanized layer forms a special metallurgical structure, which can withstand mechanical damage during transportation and use;  Comprehensive protection: Every part of the plating can be plated with zinc, even in the depression, sharp corners and hidden places can be fully protected;  Save time and effort: The galvanizing process is faster than other coating methods and avoids the time required to apply on the site after installation. 

Our inventory specifications

Hot dipped Galvanized steel flat bar :

25*25*3 /30*30*3/30*30*4 /40*40*3 /40*40*4/40*40*5/ 50*50*4 /50*50*5 / 50*50*6/60*60*5 /60*60*6