Galvanized square pipe is a kind of pipe with proper galvanizing treatment on the basis of square pipe, so it has a better improvement in the scope of application, and can be used in the fields of mechanical manufacturing and steel structure engineering, with better use effect. Do you know the process classification and specific difference of this product? Let's first let Jinan galvanized square tube's editor give you a brief explanation.
Galvanized square tube is divided into hot-dip galvanized square tube and cold-dip galvanized square tube from the production process. It is because of the different processing of these two kinds of galvanized square tubes that they have many different physical and chemical properties. Generally speaking, they have many differences in strength, toughness and mechanical properties.
1. Hot dip galvanized square pipe:
It is a kind of square tube which is made by welding after rolling steel plate or steel strip. On the basis of this kind of square tube, the square tube is put in the hot-dip galvanizing bath and formed after a series of chemical reactions. The production process of hot-dip galvanized square tube is relatively simple, and the production efficiency is high, and there are many varieties and specifications. This kind of square tube needs less equipment and capital, which is suitable for the production of small galvanized square tube manufacturers. But in terms of strength, the strength of this kind of steel pipe is lower than that of seamless square pipe.
2. Cold galvanized square pipe:
The cold galvanizing square tube is to use the principle of cold galvanizing to make the square tube have anti-corrosion performance. Different from hot-dip galvanizing, cold-dip galvanizing coating mainly uses electrochemical principle for anti-corrosion, so it is necessary to make the contact between zinc powder and steel, resulting in electrode potential difference, so steel surface treatment is very important.
3. Difference between cold and hot galvanizing:
There are two kinds of galvanized square tubes: hot-dip galvanized square tube and electro galvanized square tube. Hot dip galvanized square tube has wet, dry, lead-zinc, oxidation-reduction method. The main difference of different hot-dip galvanizing methods lies in how to activate the surface of steel tube after acid leaching to improve the quality of galvanizing. At present, dry process and oxidation-reduction process are mainly used in production. The surface of zinc coating is smooth, compact and uniform; It has good mechanical properties and corrosion resistance; Zinc consumption is 60% ～ 75% lower than that of hot dip galvanizing. There are many technical complexities in galvanizing, but this method must be used for single-sided coating, double-sided coating with different thickness of inner and outer surface coating, and thin-walled tube galvanizing.