The Benefits And Advantages Of Bolts After Hot-dip Galvanizing

          1. Bolts are durable after hot-dip galvanizing: in the suburban environment, the standard hot-dip galvanized anti-rust thickness can be maintained for more than 50 years without repair; in urban or offshore areas, the standard hot-dip galvanized anti-rust layer can be maintained 20 years without patching;

  2. Low cost of hot-dip galvanized bolt treatment: the cost of hot-dip galvanized anti-rust is lower than that of other paint coatings;

  3. Hot-dip galvanized bolts have good reliability: the metallurgical bond between the galvanized layer and the steel material becomes a part of the steel surface, so the durability of the coating is more reliable;

  4. Time-saving and labor-saving: the galvanizing process is faster than other coating construction methods, and it can avoid the time required for painting on the construction site after installation.

  5. The toughness of the coating is strong: the galvanized layer forms a special metallurgical structure, which can withstand mechanical damage during transportation and use;

  6. Comprehensive protection: every part of the plated parts can be coated with zinc, even in the depressions, sharp corners and hidden places can be fully protected;

  7. The most obvious benefit of hot-dip galvanized bolts is to improve the performance of the screws.

  Hot-dip galvanized bolt product use:

  The coating of hot-dip galvanized bolts is relatively thick, generally 30-60 microns, and the coating has high anti-corrosion ability. It is suitable for long-term rust prevention of steel parts for outdoor work, such as highway fences, power towers, large-size fasteners and other "rough" workpieces. The earlier iron water pipes were also hot-dip galvanized.

  In addition, due to high strength and corrosion resistance, hot-dip galvanized bolts are increasingly used as bolts for power towers, signal towers, and highway guardrails bolts.

  Hot-dip galvanized bolt zinc layer protection performance description:

  Usually the electrogalvanized layer thickness is 5~15μm, while the hot-dip galvanized bolt layer is generally above 35μm, even as high as 200μm. Hot-dip galvanized bolts have good coverage, dense coating, and no organic inclusions. As we all know, the anti-atmospheric corrosion mechanism of zinc has mechanical protection and electrochemical protection.

Under atmospheric corrosion conditions, there are ZnO, Zn(OH)2 and basic zinc carbonate protective films on the surface of the zinc layer, which can slow down the corrosion of zinc to a certain extent. If this protective film (also known as white rust) is damaged, a new film will be formed. layer. When the zinc layer is severely damaged and endangers the iron substrate, zinc will electrochemically protect the substrate,

  The standard potential of zinc is -0,76V, and the standard potential of iron is -0,44V. When zinc and iron form a micro battery, zinc is dissolved as an anode, and iron is protected as a cathode. Obviously, hot-dip galvanized bolts have better atmospheric corrosion resistance to base metal iron than electro-galvanized bolts.