Q: What are the special requirements for galvanized coils for home appliances?
A: Cold-rolled base plate (smooth surface), small or no spangles, zinc layer of 120-180g/m², and excellent processability (such as deep-drawing grade ST04Z).
Q: What is the difference between contracted and genuine galvanized coils?
A: Contracted products are products with minor defects permitted by the steel mill and are not subject to quality complaints at the time of sale. Genuine products (Group 1/Group 2) meet all standard requirements.
VI. Storage and Transportation
Q: What are the key points to consider when storing galvanized coils?
A: ① Keep the room well ventilated and dry to avoid dew and moisture; ② Do not damage the packaging paper and use wooden supports underneath; ③ Stack no more than two layers and store for no more than three months.
Q: How should galvanized coils be protected during transportation?
A: Cover with tarpaulin to prevent rain, use wooden blocks and rubber cushions, and secure with ropes to prevent collisions and damage to the coating due to friction.
Q: How should oil stains on the surface of galvanized coils be handled? A: Gently wipe with a neutral detergent. Avoid using strong acids or bases. Dry promptly after cleaning to prevent corrosion.