It is the responsibility of the business to make sure that advertising flags do not pose danger to people around it. Actions must be taken to ensure that flag installations are sturdy enough to prevent accidents and injuries.
One of the major factors that needs to be focused on is the effect of corrosion to flag components. Corrosion or rusting eats into certain types of metal, causing structural weakness which can lead to failure.
The flagpole is one of the components of the flag that take the most beating. The forces generated by the wind getting caught in the flag fabric is transferred to the pole. If the pole is not sturdy enough, it can bend or break from the wind. In order to ensure optimum strength against wind-generated forces, steel is the preferred material used for flagpoles.
The issue with steel is that it is susceptible to rusting when exposed to moisture. The air contains a decent amount of moisture at any given time. An unprotected steel flagpole can rust very quickly. As the rust eats through the steel, it loses its structural strength.
A steel flagpole must be protected against corrosion by coating it with corrosion-resistant paint. The paint prevents the surface of the steel from coming in contact with the moisture in the air. A special type of steel called weathering steel can also be used to further improve the life of the flagpole. When exposed to moisture-rich air, the layer rust that forms on the surface of the steel is compact enough that it effectively creates a barrier that prevents further contact between the steel and the air, thus greatly inhibiting further rusting.