c型钢也被称为低合金钢,碳含量低于0.2重量个点.个点的钢.主要添加铜、铬、镍、磷、硅、锰作为合金元素,总量不超过3-5 wt个点.这些钢合金的化学成分通过特殊配方,能尽快构成防锈/氧化铁层,从而为根底钢供给耐候性涂层.

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型钢的腐蚀率很低,用c型钢建造的桥梁很容易达到120年的规划寿数,但维护费用很少.事实上,c型钢结构还供给了许多其他优点,包括下降总生命周期本钱和提高anquan性,由于不需要维护性油漆体系,并且缩短了检查周期.

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, 

对油漆的需求也意味着挥发性有机化合物不会释放到大气中,施工速度会加速.从初始材料本钱和维护的角度来看,c型钢大桥的本钱一般比传统的涂漆钢替代品低5个点.它于1933年shouci投放市场,以消除对货车喷漆和其他维护的需求.这种合金出现了生锈或生锈的外观.如今,它受到了一些修建师的特别青睐,并装饰有许多zhuming的修建和前史遗址,如伊利诺伊州的约翰迪尔国际总部和英国的北方天使纪念碑.c型钢的铜锈不只具有比低碳钢更高的耐腐蚀性,并且具有诱人的外观和自修复才能.

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型钢的优异腐蚀性能名义上是根据合金中铜和镍含量的添加,虽然其他合金元素(如铬、锰和磷)也有奉献.铜对于维护氧化层与金属的结合以及减缓腐蚀尤为重要.

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

钢铁是答应生锈的,并且由于其合金成分的原因,生锈的速度比传统钢铁慢,生锈构成了一层维护涂层,减缓了今后的腐蚀速度.研讨标明,反复枯燥/湿循环对构成zuijia细密附着防锈层非常重要.雨水能够很好的冲刷钢材外表,并且容易排水,具有快干的功用.zui近对捷克共和国S355J   2W钢建造的高速公路桥梁的研讨标明,这些结构bixu没有用于收集水的间隙,由于在这些区域会发生腐蚀,而不会构成维护性的青铜色.

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型钢的氧化过程能够继续几年,然后外表由紧密结合的涂层安稳.这在很大程度上取决于当前的大气条件.磷和硫在铜绿层构成中的作用也很重要,由于低溶解度的硫酸盐或磷酸盐是在碱性钢和已有腐蚀物之间构成的,前提是外表暴露于周期性枯燥的湿循环ISO   9223[5]指出"用SO   2污染大气会构成更具维护性的防锈层.Leygraf和Graedel支撑这一观点,但他们也以为,大量非金属氧化物会导致水层激烈酸化,从而阻止铜绿假单胞菌的构成.磷还被证明在钢外表构成维护性钝化膜,能够防止侵蚀性离子和水分的进入,从而支撑构成连接和细密的铜绿层.然而,磷会对合金的晶粒结构和钢的机械强度产生不利影响,因此添加低含量的硼或碳来康复所需的晶界.

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