If metal corrosion occurs on the solar panel support, the strength of the panel itself and the joints will be reduced, and it may be damaged by strong winds and earthquakes. Therefore, the corrosion of the solar panel racking system can not be ignored in extending the life of the photovoltaic power station.

The main corrosion-prone parts of solar mounting brackets are

1. Metal surface and end surface produced after cutting

2. The root of the solar panel brackets where connected to the ground or concrete foundation

3. Joint with solar panel

Metal surface and end surface produced after cutting

The rack made of steel usually requires hot-dip galvanizing or other processing on the surface. However, despite the anti-corrosion plating treatment has done, the rack will gradually corrode slightly. Depending on the installation environment, the degree of corrosion is also different. And iron materials are corroded at most about 0.1 mm per year. But the galvanized steel is only about one-tenth of it. In addition, the degree of corrosion varies greatly depending on the type of plating.

Corrosion may also occur in the processed metal parts. For example, in the process of manufacturing the bracket, the metal sheet need to be cut and will form the end surface. This end surface exposes the steel material that has not been electroplated, and it may be prone to corrosion depending on the steel material and the thickness of the plating.

Corigy's surface treatment of solar panel fixing brackets can be done from hot-dip galvanizing to Al-Mg-Zn coating. And the film thickness>80um.

Surface treatment is carried out after cutting. And the rubber end cap can be provided too.

The root of the solar panel brackets where connected to the ground or concrete foundation

The part where connected to the ground or concrete foundation is prone to corrosion. This is caused by the high humidity of the ground and the concrete surface exposed to rain. The metal has been soaked for a long time and corroded.

Effective drainage measures must be taken around the bracket. The upper part of the concrete foundation can adopts inclined design, etc.

Joint with solar panel

If different metals are in contact, due to the difference in the standard electrode potential, a current will be generated. The metal with a strong ionization tendency will be severely corroded. So avoid using different metals on the joint part of the structure.

Regular inspection of the bracket, re-painting of the surface film and replacement of corroded parts according to the specific situation, etc., will help to extend the life of the solar power system.