The size of the zinc spangles on galvanized steel strip primarily affects its appearance and some performance.
In terms of surface properties, the size of the zinc spangles directly determines the material's appearance and suitability for subsequent processing. Galvanized steel strip with large zinc spangles has noticeable zinc spangles and a rougher appearance, creating a unique decorative effect. However, due to its slightly less flat surface, applications requiring spraying or lamination require additional polishing, which can affect coating adhesion.

Galvanized steel strip with small or no zinc spangles has a smoother surface and relatively better corrosion resistance. This is because there are fewer gaps between the zinc spangles, reducing the chance of corrosive media intrusion.

Painting: This is a common corrosion protection method. Various anti-corrosion paints, such as epoxy and polyurethane paints, are applied to the surface of the spiral pipe to form a dense film that isolates the pipe surface from air, moisture, and corrosive media, thereby providing corrosion protection. Before painting, the pipe surface must be rigorously treated, including rust removal and cleaning, to ensure paint adhesion and corrosion protection. Generally, primer provides good adhesion and rust protection, while topcoat provides aesthetics and weather resistance.

Galvanizing: The spiral pipe is immersed in molten zinc, allowing the zinc layer to adhere to the pipe surface, forming a galvanized coating. This coating offers excellent corrosion resistance and electrochemical protection, effectively preventing corrosion. Galvanized pipes are available in two types: hot-dip galvanizing and electrogalvanizing. Hot-dip galvanizing offers better corrosion protection and a longer service life, but also comes at a relatively high cost. Electrogalvanizing is faster and less expensive, but its corrosion protection is slightly inferior to hot-dip galvanizing.

Epoxy powder coating: Epoxy resin powder is applied to the spiral pipe surface via electrostatic spraying or fluidized bed coating, then cured at high temperature to form a durable epoxy powder coating. Epoxy powder coating offers excellent corrosion resistance, wear resistance, and adhesion, maintaining excellent corrosion protection performance in harsh environments. This corrosion protection method is suitable for various highly corrosive environments, such as the chemical and petroleum industries.

Inner lining: The interior of the spiral pipe is lined with an anti-corrosion material, such as rubber, plastic, or fiberglass, to prevent internal corrosion. This lining offers excellent corrosion resistance and sealing properties, effectively protecting the media within the pipe from contamination.

Due to their high strength and cost-effectiveness, carbon steel bolts are widely used in building structures, bridges, and large equipment installations.
Mechanical Manufacturing: They are suitable for the assembly and fastening of mechanical equipment, especially in applications requiring high-strength fastening.
Automotive Industry: Carbon steel bolts are widely used in automotive manufacturing, especially those that have undergone corrosion protection treatment, which can meet the strength and corrosion resistance requirements of automotive parts.