很多新客户对光伏支架的选材不了解，造成方案的不适应以及低效，下面我来给你介绍太阳能支架钢材与铝材之间的优缺点。
Many new customers do not know too much about how to select material of Solar brackets, resulting in the unadaptability of the scheme and inefficiency, below I will introduce you to the advantages and disadvantages between steel and aluminum solar mounting.
①钢与铝材料强度方面（Steel and aluminum strength）
太阳能支架一般采用Q235B钢材与铝合金挤压型材6005 T5，强度方面，6005-T5铝合金大概为Q235 B钢材的68%-69%，所以一般在强风地区, 跨度比较大等情况下,太阳能支架钢材优于铝合金型材。
The solar mounting material generally adopts Q235B steel and aluminum alloy extruded profile 6005-T5, in terms of strength, 6005-T5 aluminum alloy is about 68%-69% of Q235B steel, so generally in strong wind areas, Solar mounting rail span is relatively large and other situations , steel is better than aluminum alloy profile. In the other words, steel is better for utility project.
②挠度变形方面（Deflection deformation）
在同等条件下，铝合金型材变形量是钢材的2.9倍，重量是钢材的35%，造价方面在同等重量下，铝材是钢材的3倍。所以一般在强风地区、跨度比较大、造价方面等条件钢材优于铝合金型材。
Under the same conditions, the deformation of aluminum alloy profile is 2.9 times that of steel, the weight is 35% of steel, and the cost is 3 times that of steel under the same weight. Therefore, generally in strong wind areas, solar mounting rail span is relatively large, considering cost and other conditions steel is better choice.
③防腐蚀方面（Anti-corrosion aspects）
铝合金在标准大气环境下，处于钝化区，其表面形成一层致密的氧化膜，阻碍了活性铝基体表面与周围大气相接触，故具有非常好的耐腐蚀性，且腐蚀速率随时间的延长而减小。
Aluminum alloy in the standard atmospheric environment, in the passivation zone, its surface forms a dense oxide film, hindering the surface of the activated aluminum matrix from contacting the surrounding atmosphere, so it has very good corrosion resistance, and the corrosion rate decreases with the extension of time.
钢材在在标准环境下，80μm镀锌厚度能保证使用20年以上，但在高湿度工业区或高盐度海滨甚至温带海水里则腐蚀速度加快，镀锌量通常需要达到100μm以上并且需要每年定期维护。
In the standard environment, the galvanized thickness of 80μm can be guaranteed to be used for more than 20 years, but in high-humidity industrial areas or high-salinity coastal or even temperate seawater, the corrosion rate is accelerated, and the galvanizing thickness usually needs to reach more than 100μm and requires regular maintenance every year.
④表面处理对比（Surface treatment comparison）
铝合金型材有很多种表面处理方式，如阳极氧化、化学抛光等。外表美观并能适应各种强腐蚀作用的环境。钢材则一般采用热浸镀锌、表面喷涂、油漆涂层等方式。外观差于铝合金型材，在防腐蚀性能方面也差于铝型材。
There are many surface treatment methods for aluminum alloy profiles, such as anodizing, chemical polishing, etc. Beautiful appearance and can adapt to a variety of strong corrosive environments. Steel generally adopts hot-dip galvanizing, surface spraying, paint coating and other methods. The appearance is worse than that of aluminum alloy profiles, and it is also inferior to aluminum profiles in terms of corrosion resistance.
综合对比下来，铝材质量轻，防腐蚀性能强，对于有承重要求的屋顶电站/腐蚀性强环境/化工厂电站等，采用铝合金做支架比较好。钢材强度高，承受荷载时挠度变形小，一般用于手里比较大的部件，在大风、跨度要求比较大的光太阳能支架电站比较适合。
In comprehensive comparison, aluminum is light in weight and strong in corrosion resistance, and it is better to use aluminum alloy as a bracket for rooftop power stations with load-bearing requirements/corrosive environment/chemical plant power stations. Steel has high strength and small deflection deformation when bearing load, generally used for relatively large parts in hand, and is more suitable for solar bracket power stations with large winds and span requirements.
All in one sentence, for small solar project, choose Aluminum mounting system, easy and quick to install and to save labor cost. For utility solar power project, choose Steel mounting system, designed and manufactured according to project requirements.
晨科深入光伏支架市场已经16年，拥有自己的光伏支架加工工厂，以及专业的技术团队，或者多项国际认证，更多光伏支架解决方案请联系我们！
CHIKO SOLAR has been deeply involved in the Solar mounting market for 16 years, we are manufactory, we export by self , we have technical team, also have a number of international certifications. Welcome more solar mounting or OEM solar bracket question consulted us ! please feel free to contact us!
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