c型鋼也被稱為低合金鋼,碳含量低于0.2重量個點.個點的鋼.主要添加銅、鉻、鎳、磷、硅、錳作為合金元素,總量不超過3-5 wt個點.這些鋼合金的化學成分通過特殊配方,能盡快構成防銹/氧化鐵層,從而為根底鋼供給耐候性涂層.

C-type steel, also known as low alloy steel, has a carbon content of less than 0.2 weight points per point. Copper, chromium, nickel, phosphorus, silicon, and manganese are mainly added as alloying elements, with a total amount of no more than 3-5 wt points. The chemical composition of these steel alloys can quickly form a rust proof/iron oxide layer through special formulas, providing a weather resistant coating for the base steel

c型鋼的腐蝕率很低,用c型鋼建造的橋梁很容易達到120年的規劃壽數,但維護費用很少.事實上,c型鋼結構還供給了許多其他優點,包括下降總生命周期本錢和提高anquan性,由于不需要維護性油漆體系,并且縮短了檢查周期.

The corrosion rate of C-shaped steel is very low, and bridges built with C-shaped steel can easily reach the planned lifespan of 120 years, but the maintenance cost is very low. In fact, C-shaped steel structures also provide many other advantages, including reducing the total life cycle cost and improving safety. Due to the lack of maintenance oil paint system and shortening the inspection cycle, 

對油漆的需求也意味著揮發性有機化合物不會釋放到大氣中,施工速度會加速.從初始材料本錢和維護的角度來看,c型鋼大橋的本錢一般比傳統的涂漆鋼替代品低5個點.它于1933年shouci投放市場,以消除對貨車噴漆和其他維護的需求.這種合金出現了生銹或生銹的外觀.如今,它受到了一些修建師的特別青睞,并裝飾有許多zhuming的修建和前史遺址,如伊利諾伊州的約翰迪爾國際總部和英國的北方天使紀念碑.c型鋼的銅銹不只具有比低碳鋼更高的耐腐蝕性,并且具有誘人的外觀和自修復才能.

The demand for paint also means that volatile organic compounds will not be released into the atmosphere, and construction speed will accelerate. From the perspective of initial material cost and maintenance, the cost of C-shaped steel bridges is generally 5 points lower than traditional painted steel alternatives. It was launched on the market in 1933 to eliminate the need for truck painting and other maintenance. This alloy has a rusty or rusty appearance. Nowadays, it is particularly favored by some builders, And decorated with many Zuming construction and prehistoric sites, such as the John Deere International Headquarters in Illinois and the Northern Angel Monument in the UK. The copper rust of C-shaped steel not only has higher corrosion resistance than low-carbon steel, but also has an attractive appearance and self-healing ability. 

c型鋼的優異腐蝕性能名義上是根據合金中銅和鎳含量的添加,雖然其他合金元素(如鉻、錳和磷)也有奉獻.銅對于維護氧化層與金屬的結合以及減緩腐蝕尤為重要.

The excellent corrosion performance of C-shaped steel is nominally based on the addition of copper and nickel content in the alloy, although other alloying elements such as chromium, manganese, and phosphorus also contribute. Copper is particularly important for maintaining the bonding between the oxide layer and the metal and mitigating corrosion

鋼鐵是答應生銹的,并且由于其合金成分的原因,生銹的速度比傳統鋼鐵慢,生銹構成了一層維護涂層,減緩了今后的腐蝕速度.研討標明,反復枯燥/濕循環對構成zuijia細密附著防銹層非常重要.雨水能夠很好的沖刷鋼材外表,并且容易排水,具有快干的功用.zui近對捷克共和國S355J   2W鋼建造的高速公路橋梁的研討標明,這些結構bixu沒有用于收集水的間隙,由于在這些區域會發生腐蝕,而不會構成維護性的青銅色.

Steel is allowed to rust, and due to its alloy composition, the rate of rust is slower than traditional steel. Rust forms a maintenance coating that slows down future corrosion rates. Research has shown that repeated dry/wet cycles are very important for forming a fine adhesion rust prevention layer. Rainwater can effectively wash away the surface of steel and is easy to drain, A recent study on highway bridges constructed with S355J 2W steel in the Czech Republic has shown that these structures do not have gaps for collecting water, as corrosion can occur in these areas and do not form a maintenance bronze color. 

c型鋼的氧化過程能夠繼續幾年,然后外表由緊密結合的涂層安穩.這在很大程度上取決于當前的大氣條件.磷和硫在銅綠層構成中的作用也很重要,由于低溶解度的硫酸鹽或磷酸鹽是在堿性鋼和已有腐蝕物之間構成的,前提是外表暴露于周期性枯燥的濕循環ISO   9223[5]指出"用SO   2污染大氣會構成更具維護性的防銹層.Leygraf和Graedel支撐這一觀點,但他們也以為,大量非金屬氧化物會導致水層激烈酸化,從而阻止銅綠假單胞菌的構成.磷還被證明在鋼外表構成維護性鈍化膜,能夠防止侵蝕性離子和水分的進入,從而支撐構成連接和細密的銅綠層.然而,磷會對合金的晶粒結構和鋼的機械強度產生不利影響,因此添加低含量的硼或碳來康復所需的晶界.

The oxidation process of C-shaped steel can continue for several years, and then the surface is stabilized by a tightly bonded coating. This largely depends on the current atmospheric conditions. The role of phosphorus and sulfur in the formation of the copper green layer is also important, as low solubility sulfates or phosphates are formed between alkaline steel and existing corrosives, The premise is that the appearance is exposed to periodic dry wet cycles, as stated in ISO 9223 [5] Polluting the atmosphere with SO2 will form a more maintainable rust prevention layer. Leygraf and Graedel support this viewpoint, but they also believe that a large amount of non-metallic oxides can cause severe acidification of the water layer, thereby preventing the formation of Pseudomonas aeruginosa. Phosphorus has also been proven to form a maintenance passivation film on the surface of steel, which can prevent the entry of corrosive ions and water, thereby supporting the formation of a connected and fine copper green layer. However, phosphorus can affect the grain structure of alloys and the mechanical properties of steel The mechanical strength has an adverse effect, so low levels of boron or carbon are added to restore the required grain boundaries