Hot-dip galvanized strip steel is a commonly used building material, but some surface defects often occur during the production process, such as uneven zinc layer, zinc skin, rust spots, etc., which affect the aesthetics and durability of the product.
The uneven zinc layer may be caused by impurities such as grease and oxides on the surface of the strip that affect the uniformity of galvanizing, or it may be caused by uneven flow of the plating solution during the galvanizing process. The key to solving this problem is to strengthen the cleaning and pretreatment of the surface of hot-dip galvanized strip steel to ensure that there are no impurities on the surface; at the same time, optimize the operating parameters of the galvanizing equipment to ensure uniform flow of the plating solution and the uniformity of the zinc layer.
Zinc skin refers to the irregular bulges or depressions in the galvanized layer on the surface of the steel strip. It is usually caused by factors such as too high organic content in the galvanizing solution, too high plating temperature, too fast plating speed, etc. To solve this problem, we need to optimize the galvanizing process, reduce the organic content, reduce the galvanizing temperature and speed, and ensure that the coating is uniform and neat.
Rust spots are often local corrosion spots on the surface of the strip, which may be caused by the presence of pollution, oxides, etc. on the surface of the strip, or by moisture during storage and transportation. The way to solve this problem is to strengthen the surface treatment of the strip to ensure its cleanliness; at the same time, pay attention to moisture-proofing during storage and transportation to avoid contamination and oxidation on the surface of the strip.
