Knowledge

• 14/Nov2025

  How to improve the durability of the rust conversion coating on Q355NH?

  To improve the durability of the rust conversion coating on Q355NH, focus on enhancing coating adhesion, blocking corrosive factors, and extending film stability—here are actionable methods organized

• 14/Nov2025

  How often should the cut surface of Q355NH be cleaned during the production p...

  The cut surface of Q355NH only needs one thorough cleaning during production—specifically, within 24–48 hours after cutting, before applying post-cutting treatments (rust conversion coating, painting,

• 14/Nov2025

  What are the specific steps for cleaning the cut surface of Q355NH?

  Cleaning the cut surface of Q355NH is a critical pre-treatment step—its core goal is to remove all contaminants (oil, oxide scale, slag, dust) and the heat-affected zone (HAZ) to ensure treatment agen

• 14/Nov2025

  Are there any special precautions for the post-cutting treatment of 0355NH in...

  Its post-cutting treatment requires scalability, efficiency, and consistency control tailored to production scales (small-batch precision, medium-scale batch processing, large-scale mass production).

• 14/Nov2025

  How to ensure the quality of the post-cutting treatment of Q355NH?

  To ensure the quality of Q355NH’s post-cutting treatment, you need to implement full-process control—covering pre-treatment preparation, on-site operation, post-treatment inspection, and long-term mon

• 14/Nov2025

  What are the specific requirements for the selection of anti-corrosion coatin...

  The selection of anti-corrosion coatings for Q355NH (weathering steel) must focus on compatibility with its natural patina, breathability to avoid moisture trapping, and corrosion resistance matching

• 14/Nov2025

  How long does the rust conversion coating last on Q355NH?

  The rust conversion coating on Q355NH typically lasts 3–8 years under normal conditions, with a maximum service life of 10+ years in mild environments and 2–5 years in harsh settings. Its durability d

• 14/Nov2025

  Are there any precautions for post-cutting treatment of Q355NH?

  Post-cutting treatment of Q355NH requires strict precautions to ensure effectiveness, avoid damaging the steel’s properties, and prevent safety or environmental risks.

• 14/Nov2025

  How to choose the appropriate post-cutting treatment method for Q355NH?

  Choosing the appropriate post post-cutting treatment method for Q355NH depends on 4 core factors: the application environment, visibility of the cut edges, production scale, and cost constraints.

• 14/Nov2025

  What are the common post-cutting treatment methods for Q355NH?

  Q355NH (weathering steel) requires targeted post-cutting treatments to restore corrosion resistance at cut edges, as cutting processes (flame, plasma, laser, etc.) damage the protective patina and cre