1.What are the advantages and disadvantages of compressed air purging method?
Description: This is the most common and direct method. Using the factory's centralized air supply system or a handheld air gun, high-pressure air is used to remove dust from the surface of the web.
Advantages: Fast, convenient, and low-cost, suitable for initial cleaning on production lines.
Disadvantages:
May generate dust, causing secondary pollution, and requires a well-equipped dust removal system.
Limited effectiveness for tightly adhered dust.
Compressed air containing oil or water may cause additional contamination.
2.What are the pros and cons of cleaning with a soft brush or a roller brush?
Description: The galvanized coil is passed over a special soft-bristle brush roller or brushed with a handheld soft-bristle brush to remove dust.
Advantages: Physical contact provides better cleaning than simply blowing air, with minimal risk of damage to the zinc coating (assuming the brush bristles are soft enough).
Disadvantages: Slow, suitable for small batches or as a secondary step.
3.What are the advantages and disadvantages of the vacuum cleaning method?
Description: Uses a powerful industrial-grade vacuum cleaner to directly remove dust from the surface of the galvanized coil.
Advantages: Dust-free operation, no secondary contamination, and excellent cleaning results.
Disadvantages: Relatively low efficiency, and inconvenient handling for wide coils.
4.What are the advantages and disadvantages of washing with clean water to remove dust?
Description: Rinse with pure or deionized water using a high-pressure water jet or a specialized cleaning machine.
Advantages: Effectively removes most dust and soluble salts.
Disadvantages:
Immediate and thorough drying is essential, otherwise white rust (wet storage corrosion) will quickly form on the galvanized surface.
Requires auxiliary drying equipment (such as an air knife or drying oven).
5.What are the methods and steps of a professional production line?
Brushing: Use a nylon brush roller to remove loose particles from the surface.
Alkaline Cleaning: Spray with an alkaline cleaning solution to remove grease and stubborn dirt.
Water Rinse: Rinse repeatedly with clean water to remove residual cleaning agent.
Drying: Use a hot air dryer or air knife to thoroughly dry the surface of the roll.