钢材市场中钢材的种类很多，如果要说哪一种钢材是比较常用的话，那肯定就是镀锌方管了。

There are many kinds of steel in the steel market. If you want to say which kind of steel is more commonly used, it must be galvanized square tube.

镀锌方管是一种具以热轧或冷轧镀锌带钢或镀锌卷板为坯料经冷弯曲加工成型后再经高频焊接制成的方形截面形状尺寸的空心方形的截面型钢钢管；或将事先做好的冷弯空心型钢管再经热浸镀锌加工而成的镀锌方矩管。济南镀锌方管下面说说热镀锌方管与冷镀锌方管区分方式。

Galvanized square pipe is a kind of hollow square cross-section steel pipe with square cross-section shape and size made by cold bending and high-frequency welding with hot-rolled or cold-rolled galvanized steel strip or galvanized coil plate as blank, or galvanized square pipe made in advance by hot-dip galvanizing. Jinan galvanized square tube below talk about the hot galvanized square tube and cold galvanized square tube distinguish way.

济南镀锌方管

Jinan galvanized square pipe

热镀锌方管有湿法、干法、铅锌法、氧化还原法等。

Hot dip galvanized square tube has wet method, dry method, lead-zinc method, oxidation-reduction method and so on.

不同热镀锌方法的主要区别在钢管酸浸清洗后，用什么方法活化管体表面提高镀锌质量。现生产中主要采用干法和氧化还原法，其特点见表。

The main difference of different hot dip galvanizing methods is how to activate the surface of pipe body to improve the quality of galvanizing after pickling. Dry process and redox method are mainly used in production, and their characteristics are shown in the table.

电镀锌的锌层表面十分光滑致密、组织均匀;具有良好的力学性能和抗腐蚀能力；锌耗比热镀锌低60%～75%。

The results show that the surface of zinc coating is very smooth and compact, the structure is uniform, the mechanical properties and corrosion resistance are good, and the zinc consumption is 60% ~ 75% lower than that of hot dip galvanizing.

电镀锌在技术上有一定的复杂性，但对单面镀层，内外表面镀层厚度不同的双面镀层，以及薄壁管镀锌等皆须采用此法。

The technology of electro galvanizing is complex, but it is necessary to use this method for single side coating, double-sided coating with different thickness of inner and outer surface, and thin-walled tube galvanizing.