7 8 concrete nails

Latest articles


  • (5) Excellent process basis to ensure the uniformity of coating thickness, corrosion resistance is stronger;
  • 6, passivation to remove hydrogen parts should be passivation after the removal of hydrogen, passivation before the application of 1%H2SO4 or 1% hydrochloric acid activation 5~15s. Passivation shall be treated with colored chromate unless otherwise specified in the design drawings.

  • Latest articles

    Links