Answers

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  What are the advantages of ZAM coating?

  ZAM (zinc aluminum magnesium) coating is a ternary alloy coating. Its main components are zinc, 11% aluminum, 3% magnesium, and a small amount of silicon. ZAM coating has excellent resistance to red rust and self-healing corrosion on shear surfaces, and also has weldability far superior to ZAM steel plates.
  
  The addition of alloying elements such as Al and Mg to the ZAM (zinc-aluminum-magnesium) steel plate coating greatly improves the corrosion inhibition effect of the coating, making its corrosion resistance several to ten times that of ordinary galvanized steel plates.
  
  The ZAM coating is denser than ordinary galvanized coatings, so it is less prone to peeling during stamping. It has excellent tensile and stamping processing properties under harsh conditions, and due to its high hardness, it has excellent damage resistance.
  
  The ZAM coating has a self-healing effect. The coating components around the cut surface continuously dissolve, forming a dense protective film mainly composed of zinc hydroxide, alkaline zinc chloride, and magnesium hydroxide. This protective film has low conductivity and inhibits corrosion on the cut surface.

  
  
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  How should corrugated steel culverts be maintained and handled?

  1. Strictly control the quality of raw materials for corrugated steel culverts. Corrugated pipes brought to the site must be stacked neatly and orderly, and no one should step on them. Corrugated steel culverts need to be covered and protected to prevent them from aging prematurely due to wind and rain.
  
  2. The steel corrugated steel culvert should be cut straight, avoiding a beveled cut.
  
  3. Method for corrugated steel culvert joint: The corrugated steel culvert joint should be wrapped with a 0.3-meter-long large corrugated pipe, and both ends should be tightened in half, with no gaps left in the base. To ensure that no empty space is left in the center, markings should be made at both ends of the connector. After finishing, wrap it tightly with tape.
  
  4. When welding reinforcing bars near corrugated steel culverts, measures should be taken to protect the corrugated pipe from being burned. If it is accidentally burned, the burned area should be tightly wrapped with tape.
  
  5. When dismantling the mold, take care to protect the corrugated steel culverts that are exposed at the ends.
  
  

  For further questions regarding corrugated steel culverts, please refer to this article: FEATURE| Corrugated Steel Culvert: The Solution for Cost Reduction and Efficiency Improvement in Infrastructure Engineering

  
  
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  We plan to import steel bars to Vietnam. Are there any restrictions on importing steel bars from your country at present?

  Thank you very much for your inquiry. Currently, there are no special restrictions on imports to your country. You can tell us the specific specifications, quantity, and other requirements of the rebars you wish to buy, and we can provide you with an accurate quote.
  You can contact us in the following ways
  cs@chinasteelmarket.com
  +86-18864881658 (Whatsapp&Wechat)

  
  

  We can provide high-quality steel bars that meet Vietnamese import standards and assist you with relevant customs and certification matters. Please feel free to contact us directly for a detailed solution.  Tel: +86 0435-3793130