Galvanizing is the process of coating a protective layer of zinc on steel or iron to prevent rusting. The common method is hot-dip galvanizing, that is, immersing the parts in the molten hot galvanizing bath, so as to achieve the effect of galvanizing.

雖然鍍鋅會(huì)控制底層鋼的腐蝕，但在幾十年的氣候暴露后，生銹是不可避免的，尤其是如果暴露在酸性條件下。例如，盡管有鋅涂層的保護(hù)作用，波紋鐵皮屋頂將在幾年內(nèi)開(kāi)始退化。

Although galvanizing will control the corrosion of the underlying steel, rust is inevitable after decades of climate exposure, especially if exposed to acid conditions. Corrugated sheet iron roofs, for example, will begin to degrade in a few years, despite the protective effect of zinc coating.

海洋和含鹽環(huán)境也降低了鍍鋅鐵的壽命，因?yàn)楹Ｋ母唠妼?dǎo)率增加了腐蝕速率，主要是通過(guò)將固體鋅轉(zhuǎn)化為可溶的氯化鋅，而氯化鋅只是被洗掉。鍍鋅車架就是一個(gè)例子；在寒冷的環(huán)境中，由于道路上的鹽份，它們的腐蝕速度更快，盡管它們比未受保護(hù)的鋼材更耐用。

Marine and saline environments also reduce the life of galvanized iron, because the high conductivity of seawater increases the corrosion rate, mainly by converting solid zinc into soluble zinc chloride, which is only washed away. Galvanized frame is an example; In cold environments, they corrode faster because of the salt on the road, although they are more durable than unprotected steel.

濟(jì)南通風(fēng)管道加工

Jinan ventilation pipe processing

如果保持其他補(bǔ)充措施，如油漆涂層和額外的犧牲陽(yáng)極，鍍鋅鋼可以使用幾十年。在無(wú)鹽環(huán)境中的腐蝕速度主要是由空氣中的二氧化硫含量引起的。

Galvanized steel can be used for decades if other complementary measures such as paint coating and additional sacrificial anodes are maintained. The corrosion rate in salt free environment is mainly caused by the content of sulfur dioxide in the air.

通風(fēng)管道鍍鋅或者卷板鍍鋅是非常常見(jiàn)的用途，全世界每年鍍鋅數(shù)十萬(wàn)噸鋼產(chǎn)品。濟(jì)南通風(fēng)管道加工發(fā)現(xiàn)在發(fā)達(dá)，大多數(shù)較大的城市都有幾個(gè)鍍鋅廠，許多鋼鐵制造項(xiàng)目都是為了保護(hù)而鍍鋅的。通常包括：街道家具、建筑框架、陽(yáng)臺(tái)、陽(yáng)臺(tái)、樓梯、梯子、走道等等。熱浸鍍鋅鋼也用于制造鋼架，作為鋼架建筑的基本建筑材料。

Galvanizing of ventilation pipes or coils is a very common use. Hundreds of thousands of tons of steel products are galvanized every year all over the world. Jinan ventilation pipe processing found that in developed countries, most of the larger cities have several galvanizing plants, many steel manufacturing projects are galvanized for protection. Usually include: street furniture, building frame, balcony, balcony, stairs, ladder, aisle, etc. Hot dip galvanized steel is also used in the manufacture of steel frame, as the basic building material of steel frame construction.