There are two kinds of cable bridge, fire-proof bridge and galvanized bridge. They are very different and have very different uses. Let's take a look at their main applications.

1、防火橋架適用于10KV以下電力電纜，以及控制電纜、照明配線(xiàn)等室內室外架空電纜溝、隧道的敷設。

1. Fire-proof bridge is suitable for laying power cables below 10KV, control cables, lighting wiring and other indoor and outdoor overhead cable trenches and tunnels.

防火橋架主要由玻璃纖維加強資料、無(wú)機黏合劑復合的防火板，與金屬骨架復合以及其他的防火基材組成，外層加防火涂料。防火橋架遇火后不會(huì )熄滅，從而阻隔火勢蔓延。防火橋架具有極端良好的防火阻火效果，又具有耐火、耐油、耐腐蝕、、無(wú)污染，整體裝置便當等特性。防火涂料有涂層薄、耐火極限高、粘接力強的特性。

Fire-proof bridge is mainly composed of glass fiber reinforced material, inorganic binder composite fire-proof board, metal skeleton composite and other fire-proof substrates, with fire-proof coating on the outer layer. Fire-proof bridge will not be extinguished after fire, thus preventing the spread of fire. Fire-proof bridge has extremely good fire-proof and fire-retardant effect, and has the characteristics of fire resistance, oil resistance, corrosion resistance, non-toxicity, pollution-free, convenient overall device and so on. Fire retardant coatings have the characteristics of thin coating, high fire resistance limit and strong adhesion.

2、鍍鋅橋架，主要應用在濕潤、腐蝕性強環(huán)境下。依照消費工藝不同，分為熱鍍鋅和電鍍鋅(即冷鍍鋅）兩種。

2. Galvanized bridge, mainly used in wet, corrosive environment. According to different consumption processes, it can be divided into hot-dip galvanizing and electro-galvanizing (i.e. cold-dip galvanizing).

熱鍍鋅的工藝過(guò)程：將鋼件或鑄件浸入熔融的鋅液中在其外表構成鋅 — 鐵合金或鋅和鋅 — 鐵合金掩蓋層的工藝過(guò)程和辦法。

Hot-dip galvanizing process: The process and method of dipping steel or castings into molten zinc liquid to form zinc-iron alloy or zinc and zinc-iron alloy covering layer on its surface.

冷鍍鋅的工藝過(guò)程：將鋼材外表化學(xué)清洗處置后放進(jìn)電鍍液中，電鍍液含氧化鋅。直流電一極接鋼材，一極接放在電鍍液中的鋅板。通電后鋅以分子狀態(tài)置換到鋼材外表。假如加光亮劑鈍化，則表現彩云狀光亮鍍層。

Cold galvanizing process: After chemical cleaning and disposal of steel surface, it is put into the electroplating bath, which contains zinc oxide. Direct current is connected to steel at one pole and zinc sheet in electroplating bath at the other. After electrification, zinc is replaced by molecule to the surface of steel. If the brightener is added to passivate the coating, it will show cloudy bright coating.

應用在鋼構造上的電鍍鋅普通防銹效果都不是很好，主要是鍍鋅量達不到，而且鍍鋅不平均，普通兩三年就呈現生銹現象，質(zhì)量差的暴露在濕潤環(huán)境中十幾天就生銹了。熱鍍鋅鍍層較厚，抗腐蝕才能較強。冷鍍鋅鍍鋅層較熱鍍光亮，但較薄，抗銹蝕才能較弱。

Common anti-rust effect of galvanizing applied to steel structure is not very good, mainly because the amount of galvanizing is not up to, and the galvanizing is uneven. Rust occurs in two or three years, and rust occurs in poor quality exposed to wet environment for more than ten days. Hot-dip galvanized coating is thicker, so corrosion resistance is stronger. Cold galvanized galvanized layer is brighter than hot galvanized layer, but thinner, corrosion resistance is weaker.

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