Continuous Hot Dip Galvanizing Steel Strip (GBT15392-1994)
Introduction
Continuous Hot Dip Galvanizing Steel Strip (GBT15392-1994) is produced by immersion of cold-rolled carbon steel in molten zinc bath to produce uniform coating on the steel surface. The steel should be low-carbon steel with a certain strength and good formability as well as excellent weldability. The steel is processed through hot-dip galvanizing, passivation, cooling and its surface is passivated to form a rust-proof protective film.
The zinc layer of the hot dip galvanizing steel strip acts as an barrier and sacrificial anode to the steel strip, protecting the strip from corrosion. The zinc used in the hot dip galvanizing process must provide the material with good corrosion resistance and reasonable cost. The thickness of the zinc coating depends on the application, the environment and the service life of the steel strip.
Hot dip galvanizing process
Hot dip galvanizing is a process whereby stainless steel strips are passed through a hot zinc bath to coat them with a protective layer of zinc. In order to ensure the maximum corrosion protection, the zinc must be hot dip galvanized and then passivated. After hot-dip galvanizing, the steel strip can be protected for up to 15-20 years with very little maintenance.
The hot dip galvanizing process usually takes place in a zinc bath that is heated and maintained at the desired temperature. The steel strip is then immersed in the molten zinc and left to soak. After soaking, the steel strip is removed, cleaned and allowed to dry. The galvanized steel strip is then ready to be used.
Applications
Hot dip galvanizing steel strips have a wide range of applications in industry, construction and agriculture. Some of the common uses include:
- Automotive industry: galvanized steel strips are used in many parts, including frames, body panels, and bumpers.
- Industrial manufacturing: hot dip galvanizing steel strips are used in the production of welded parts, shafts, tubing, and cut pieces.
- Structural steel applications: hot dip galvanizing steel strips are often used in bridge building, and industrial and commercial building projects.
- Agriculture: galvanized steel strips are used in barns, stables, tractors, and other agricultural equipment.
Quality Control
Continuous hot dip galvanizing is a process that requires close attention to ensure the highest quality. Quality control needs to be done at the galvanizing facility and the steel strip needs to be tested according to the following criteria:
- Dimensional accuracy: The steel strip must possess good dimensional accuracy to ensure that it can be used for the intended purpose.
- Uniformity: The uniformity of the zinc coating must be examined to ensure that the galvanized steel strip is high quality.
Conclusion
Continuous hot dip galvanizing is a process that provides excellent corrosion protection to the steel strip while keeping costs reasonable. The zinc coating also helps to enhance the steels strength, formability, and weldability, making it an ideal material for many different applications.
Quality control of the steel strip is essential to ensure that the desired outcome is achieved and that the steel strip is suitable for its intended purpose.
