目前支架主要的防腐蝕方式鋼材采用熱浸鍍鋅55-80μm，鋁合金采用陽氧化5-10μm。

At present, the main anti-corrosion method for brackets is hot-dip galvanized steel 55-80 μ m. Aluminum alloy adopts anodizing 5-10 μ M.

鋁合金在大氣環(huán)境下，處于鈍化區(qū)，其表面形成一層致密的氧化膜，阻礙了鋁基體表面與周圍大氣相接觸，故具有非常好的耐腐蝕性，且腐蝕速率隨時(shí)間的延長而減小。

Aluminum alloy is in the passivation zone in atmospheric environment, and a dense oxide film is formed on its surface, which hinders the contact between the aluminum substrate surface and the surrounding atmosphere. Therefore, it has excellent corrosion resistance, and the corrosion rate decreases with time.

鋼材在普通條件下，80μm鍍鋅厚度能保證使用20年以上，但在高濕度工業(yè)區(qū)或高鹽度海濱甚至溫帶海水里則腐蝕速度快，鍍鋅量需要100μm，以上并且需要每年定期維護(hù)。

Steel under normal conditions, 80 μ The galvanized thickness can ensure a service life of more than 20 years, but in high humidity industrial areas, high salinity coastal areas, and even temperate seawater, the corrosion rate is fast, and the galvanized amount needs to be 100 μ m. The above and require regular maintenance every year.

在防腐蝕方面鋁合金遠(yuǎn)遠(yuǎn)優(yōu)異于鋼材。

Aluminum alloy is far superior to steel in terms of corrosion resistance.

其他方面對比腐蝕方面

Compared to corrosion in other aspects

1）外觀：

1) Appearance:

鋁合金型材有很多種表面處理方式，如陽氧化、化學(xué)拋光、電泳涂漆等。外表美觀并能適應(yīng)各種強(qiáng)腐蝕作用的環(huán)境。

There are many surface treatment methods for aluminum alloy profiles, such as anodizing, chemical polishing, electrophoretic painting, etc. Beautiful appearance and able to adapt to various strong corrosive environments.

鋼材則一般采用熱浸鍍鋅、表面噴涂、油漆涂層等方式。外觀差于鋁合金型材。在防腐蝕方面也差于鋁型材。

Steel is generally coated with hot-dip galvanizing, surface spraying, paint coating, and other methods. The appearance is inferior to aluminum alloy profiles. In terms of corrosion resistance, it is also inferior to aluminum profiles.

2）截面多樣性

2) Cross section diversity

鋁合金型材一般加工方式有擠壓、鑄造、折彎、沖壓等方式。擠壓生產(chǎn)是目前主流生產(chǎn)方式，通過開擠壓模的方式，可以達(dá)到生產(chǎn)出任意任意截面型材，并且生產(chǎn)速度比較快。

The general processing methods for aluminum alloy profiles include extrusion, casting, bending, stamping, etc. Extrusion production is currently the mainstream production method. By opening extrusion molds, it is possible to produce profiles of any cross-section, and the production speed is relatively fast.

鋼材則一般采用輥壓、鑄造、折彎、沖壓等方式。目前輥壓是生產(chǎn)冷彎型鋼的主流生產(chǎn)方式。截面則需要通過輥壓輪組來調(diào)節(jié)，但一般機(jī)器定型后只能生產(chǎn)同類產(chǎn)品，尺寸方面調(diào)節(jié)，而截面形狀無法改變，如C型鋼、Z型鋼等截面。輥壓生產(chǎn)方式則比較固定，生產(chǎn)速度比較快。

Steel is generally produced by rolling, casting, bending, stamping, and other methods. At present, roller pressing is the mainstream production method for producing cold-formed steel sections. The cross-section needs to be adjusted through a roller set, but generally machines can only produce similar products after shaping, and the size can be adjusted. The shape of the cross-section cannot be changed, such as C-shaped steel, Z-shaped steel, and other cross-sections. The roller pressing production method is relatively fixed and the production speed is relatively fast.

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