How harsh is the salt spray corrosion experiment? Chery frame galvanized layer with 400 hours of brine spray

Salt spray corrosion: the invisible "killer" of the vehicle

In daily life, vehicles often face various harsh environments, and salt spray corrosion is one of them that is extremely hidden but extremely destructive. When vehicles are driving in coastal areas, or where snow-melt salt is sprinkled on the road in winter, a lot of salt will be filled with in the air. These salts are like tiny "corrosive molecules" that will adhere to the surface of the vehicle, especially metal parts such as the frame.

The destruction process of salt spray corrosion is silent. After the salt combines with the moisture in the air, a corrosive brine solution will be formed. This solution will gradually penetrate into tiny gaps on the metal surface and react chemically with the metal, causing the metal to rust and corrosion. Over time, corrosion will continue to intensify, and the rust spots on the surface gradually penetrate into the metal, making the metal structure loose and fragile. As the "skeleton" of the vehicle, the frame plays a key role in supporting the body and transmitting various forces. Once the frame is damaged due to salt spray corrosion, it will seriously affect the safety and service life of the vehicle. Just like if there is a problem with the foundation of the house, the entire house will become precarious.

Salt spray corrosion experiment: "battlefield" that simulates extreme environments

In order to test the corrosion resistance of metal components such as vehicle frames in salt spray environments, scientists designed salt spray corrosion experiments. This experiment is like a "battlefield" that simulates extreme environments, placing vehicle parts in it to see if they can withstand the "bombing" of salt spray.

In salt spray corrosion experiments, special salt spray test chambers are usually used. A salt water mist containing a certain concentration of salt will continue to be sprayed in the test chamber, creating a harsh environment similar to that in coastal areas or on the roadside with melted snow salt. Metal parts such as the vehicle frame will be placed in the test chamber to receive all-round "attack" of salt water mist. During the experiment, salt water mist will continue to adhere to the metal surface, simulating the situation of long-term exposure to the salt mist environment. In this way, problems with vehicle components in corrosion resistance can be discovered in advance for improvement and optimization.

Chery frame galvanized layer: "secret weapon" that resists corrosion

In order to improve the corrosion resistance of the frame, Chery Automobile has adopted the "secret weapon" of galvanizing layer. The galvanized layer is a layer of zinc coating the metal surface of the frame. Zinc has special chemical properties and is more active than commonly used metals such as iron frames. When corrosion occurs in salt spray, zinc will preferentially react with corrosive substances in the salt water, thereby protecting the metal body of the frame from corrosion.

It's like putting on a layer of "protective clothing" on the metal surface of the frame, and the zinc layer is like a loyal guard who uses his body to resist the erosion of salt mist. Moreover, even if some minor damage occurs on the surface of the zinc layer, the surrounding zinc will continue to play a protective role, because zinc will form a dense oxide protective film during the corrosion process, preventing the further spread of corrosion. This ability of self-repair and protection makes galvanized layers a very effective means of corrosion resistance.

400-hour salt water jet: a test under the extreme challenge

In Chery's salt spray corrosion experiment, the galvanized layer of the frame needs to undergo a salt water jet test of up to 400 hours. These 400 hours are not a simple concept of time. It means that the galvanized layer of the frame must stick to its post under continuous and high-strength salt spray erosion.

During the experiment, salt water was continuously sprayed onto the galvanized layer of the frame at a certain pressure and speed, simulating the long-term use of the vehicle in harsh environments. The salt water constantly hits the surface of the galvanized layer, trying to break through this layer of protection and erodes the metal inside the frame. Over time, the surface of the galvanized layer will gradually change, and some minor corrosion marks may appear. However, the galvanized layer of the Chery frame must be kept as complete as possible in a 400-hour test to ensure that the metal body of the frame is not damaged.

Performance in the experiment: a powerful testimony of quality

During a 400-hour brine jet experiment, the galvanized layer of the Chery frame showed excellent corrosion resistance. The experimenters carefully observed and found that although there were some slight discoloration and a small amount of corrosion products on the surface of the galvanized layer, the overall structure was still intact, and there was no large-area shedding or serious corrosion and perforation.

This shows that the galvanized layer of the Chery frame can effectively block the erosion of salt spray and provide reliable protection for the frame. Compared with some frames that have not been strictly galvanized or have poor galvanized quality, Chery frames perform significantly better in salt spray corrosion experiments. This not only reflects Chery Automobile's strict standards in production process and quality control, but also provides consumers with safer and more durable vehicle products.

Inspiration and promotion to the automotive industry

The experimental results of Chery's frame galvanized layer can withstand 400 hours of salt water jetting, which has important implications and driving effects for the entire automotive industry. It shows other automakers the importance and feasibility of high standards of corrosion resistance. In the increasingly competitive automobile market, consumers have increasingly demanded on the quality and reliability of vehicles, especially in terms of corrosion resistance.

Chery's successful experience will prompt other companies to increase research and development and investment in vehicle corrosion resistance technology and improve the corrosion resistance of their own products. This will promote the continuous progress of the entire automotive industry in material selection, process improvement and quality control, and provide consumers with more quality and more durable automotive products. At the same time, it will also help enhance the competitiveness of domestic cars in the international market and allow Chinese cars to win better reputation and market share on a global scale.

The rigorousness of the salt spray corrosion experiment is beyond imagination, and the galvanized layer of the Chery frame successfully withstands 400 hours of salt water jet with its excellent performance, which not only demonstrates the quality strength of Chery Automobile, but also has a positive impact on the development of the automotive industry.