In the field of traffic facilities, corrugated guardrail panels are an important guarantee for road safety, and their quality is directly related to driving safety and the life and property safety of road users. However, in the actual purchase and use process, we sometimes encounter the problem of black spots or white rust on the surface of the corrugated guardrail board, which not only affects the appearance of the product, but also may hide serious quality problems.
First, let's take a look at the problem of dark spots on the surface of the corrugated guardrail panel. These spots are usually caused by improper treatment of the passivation process. Passivation is an important part of the production process of corrugated guardrail board, which forms a dense oxide film on the surface of the corrugated guardrail board, so as to effectively prevent the metal from contacting with oxygen in the air to achieve the purpose of anti-oxidation.
However, in order to save costs, some manufacturers may reduce the amount of passivation fluid, or workers may operate improperly during the production process, resulting in insufficient passivation time, resulting in blackened spots on the surface of the corrugated guardrail panel. These spots may not be noticeable in the early stages, but over time, especially in direct sunlight, they can quickly expand and cause corrugated guardrail panels to rust, seriously affecting their service life and safety, in which case they may need to be returned to the factory for reprocessing or contact the manufacturer to send someone to deal with it.
Another common problem is the white rust that occurs on the surface of the corrugated guardrail panels. White rust is caused by a corrosive aqueous solution formed on the surface of the galvanized layer after the galvanized layer comes into contact with moisture, oxygen and other corrosive substances. This solution destroys the chemical stability of the galvanized layer, leading to the occurrence of galvanic corrosion, which produces a powdery corrosive substance on the surface of the galvanized part, which is what we call white rust.
The occurrence of white rust is related to a variety of factors, such as direct contact with the surface of galvanized parts by the operator, high humidity in the storage environment, large temperature changes, and long storage time. Mild white rust can wipe the surface of galvanized parts that have appeared white rust with a cleaning cloth, and then return the surface to the factory if necessary. Severe white rust can be removed from the surface with mechanical rust removal tools, or surface treatment with rust remover.
Therefore, when choosing corrugated guardrail panels, we should not only pay attention to the price of the product, but also pay attention to its quality and performance. Because when it comes to road safety, the slightest flaw can have serious consequences. Therefore, we should choose those corrugated guardrail products that have undergone strict quality testing and certification to ensure that they can provide a solid guarantee for our driving safety.