Bridge erection is often used in our daily life. One of them is hot-dip galvanized bridge. It can be seen everywhere around us. It not only protects cables, but also ensures our daily power consumption. What are its characteristics?

鋼的表面全層，無論其內部是凹處管件內角，還是其他任何涂層不易觸及的角落，均應進行保護，熔融鋅可均勻地覆蓋。

The full surface layer of steel, whether its interior is concave, the inner corner of pipe fittings, or any other corner where the coating is not easy to touch, shall be protected, and the molten zinc can be evenly covered.

熱浸鋅層的硬度值比鋼材還要高，因此其抗沖擊性能和抗磨損性能都非常優異。

The hardness value of hot-dip galvanized layer is higher than that of steel, so its impact resistance and wear resistance are very excellent.

在邊緣地帶，鋅層一般比其它部位厚，具有優良的韌性和抗磨損能力。與其它涂料相比，在邊緣處，通常是薄的不易施工，易損傷和損壞，所以經常需要重新保養。

In the edge zone, the zinc layer is generally thicker than other parts, with excellent toughness and wear resistance. Compared with other coatings, at the edge, it is usually thin, difficult to construct, easy to damage and damage, so it often needs to be maintained again.

即使受到重大機械傷害，也要考慮到其他原因。造成少量鋅層脫落，使鐵基外露，此時周邊鋅層就會起到犧牲陽的作用，在這里對鋼進行保護，使其不受腐蝕。與其它涂層相反，反之亦然，銹會立即形成，并在短時間內擴散到涂層的底部，造成涂層脫落。

Even in case of major mechanical injury, other reasons shall be considered. Cause a small amount of zinc layer to fall off and expose the iron base. At this time, the surrounding zinc layer will play the role of sacrificing yang to protect the steel from corrosion. Contrary to other coatings, and vice versa, rust will form immediately and spread to the bottom of the coating in a short time, causing the coating to fall off.

鋅層在大氣環境中的損耗非常緩慢，大約為1/17到1/18的鋼鐵腐蝕深，而且是可以預測的。它的使用壽命比其他涂層都長。

The loss of zinc layer in atmospheric environment is very slow, about 1 / 17 to 1 / 18 of steel corrosion is deep, and it can be predicted. Its service life is longer than other coatings.

鍍層的使用壽命在特定環境下，主要取決于鍍層的厚度。而且鍍層厚度還受鋼材厚度的影響，即越厚的鋼材容易得到偏厚的鍍層，所以在相同的鋼結構中，厚的鋼部位一定也要同時得到偏厚的鍍層，以確保獲得較長的使用壽命。

The service life of the coating mainly depends on the thickness of the coating in a specific environment. Moreover, the coating thickness is also affected by the steel thickness, that is, the thicker the steel is, it is easy to get a thicker coating. Therefore, in the same steel structure, the thicker steel parts must also get a thicker coating at the same time, so as to ensure a longer service life.

因美觀大方藝術創意，或在特殊情況下嚴重腐蝕性環境使用時，熱浸鋅層可再施上部涂料處理，只需上部涂料的系統選擇合理，施工較容易，其耐腐蝕性能比單獨上部涂料及熱浸鋅壽命加起來，要好1.5~2.5倍。

Due to beautiful and generous artistic creativity, or when used in a severely corrosive environment under special circumstances, the hot-dip galvanized layer can be treated with the upper coating. As long as the system selection of the upper coating is reasonable, the construction is easier, and its corrosion resistance is 1.5 ~ 2.5 times better than the combined service life of the upper coating and hot-dip galvanizing alone.

用鋅層對鋼進行防護，除熱浸鍍鋅法外，還有其他多種方法，其優劣對比，一般采用廣泛，耐腐蝕效用大，且效率高，適合選擇為熱浸鍍鋅法。

In addition to the hot-dip galvanizing method, there are many other methods to protect steel with zinc coating. Its advantages and disadvantages are generally widely used, with great corrosion resistance and high efficiency. It is suitable to choose the hot-dip galvanizing method.

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