The higher the purity, the better the corrosion resistance, mainly because pure aluminum carries oxygen in the air, which generates a thin and dense natural oxide film on the surface of aluminum, which is faster and thicker than other metal oxide films, thus preventing further corrosion by hydrogen. The air contains a large amount of gas and water, which plays a protective role.
2. High mechanical strength and low corrosion resistance. Although pure aluminum has good corrosion resistance, its mechanical strength is poor, which to some extent restricts its application. Therefore, people add appropriate amounts of magnesium, copper, zinc and other metals to aluminum to manufacture various types of aluminum guardrails, which increases the mechanical strength of aluminum guardrails and expands the application range of aluminum. However, its corrosion resistance is worse than pure aluminum, so it is possible. Corrosion caused by oxidation. This requires a powder coating to protect the aluminum.
Post time: 2024-09-12