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How to distinguish hot dip galvanized steel plate and galvanized iron plate?

What is the difference between galvanized plate and iron plate?


1. the substrate is different iron plate, that is, ordinary iron plate, and hot rolled plate and cold binding plate. The surface of the hot rolled plate is black. Easy to rust, also known as black iron sheet. It is mainly rolled by high temperature heating. The surface of cold - rolled plate is generally white, more glossy than galvanized plate. Galvanized plate is in the ordinary iron plate after a surface - galvanized. In rust and corrosion prevention than "iron plate" strong! The appearance is better than ordinary iron plate!! Galvanized iron plate is divided into white iron sheet (the surface is white) and color steel plate (the surface has color pattern,).


2. the physical characteristics of different hot galvanized plate than iron plate corrosion resistance. Hot dip galvanized steel plate features strong corrosion resistance, good surface quality, conducive to deep processing, economic and practical. The tensile ductility of hot dip galvanized steel plate is basically less reliable than iron plate. Hot dip galvanized steel plate is not as easy to weld as iron plate, and the zinc layer will be damaged when welding.


3. The physical characteristics of the surface are different. One is galvanized white, and the other is black. Hardness is in fact the same, and the difference in the use of performance is larger, the general galvanized sheet processing is no longer processed, because the base surface has a better oxidation, and iron plate is not good, but also have to do a good job of surface paint otherwise oxidation.


4. Because of no heating in the production process of different iron plates, there is no pitting and oxide sheet defects that often occur in hot rolling. The surface quality is good and the finish is high. Moreover, the dimensional accuracy of iron plate products is generally very high, and the performance and organization of the products can also meet some special requirements, such as electromagnetic properties, deep drawing properties, etc. Galvanized sheet is a steel plate coated with zinc. Galvanizing is an economical and effective method of rust prevention, and about half of the world's zinc production is used in this process.


In fact, galvanized plate is a kind of alloy products made of plating a layer of zinc on the surface of steel plate by galvanizing process. So what is the anti-corrosion principle of galvanized sheet?


The first is zinc on the surface of the steel plate, can be used as a protective layer; If the protective layer is destroyed, can also form galvanic cell, steel plate as a positive electrode, zinc as a negative electrode, sacrifice anode to protect the cathode, steel plate can be protected. In a word, galvanized sheet protection of steel plate is double. The above content is a small series to introduce to you what is the difference between galvanized plate and iron plate and galvanized plate is all the knowledge of what material, from which we understand the difference is very big, to understand these later will never be silly to distinguish.



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Zhishang Steel Co., Ltd

ABOUT USOverviewThe company mainly deals in color-coated, galvanized, stainless steel pipes, stainless steel coils, stainless steel plates of various materials; hot-rolled series of rebar, medium and heavy plates, coils, I-beams, angle steels, channel steels, H-beams and other steel products and deep processing Service. (The company’s annual invent···

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