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    PosMAC Guardrail

    What is PosMAC ?

    • Innovative High Corrosion-resistant steel plate “PosMAC”

      -TERNARY ALLOY COATED STEEL PLATE(ZN-3%, Mg-2.5%, AI)

    • 3times higher corrosion-resistant properties than conventional hot-dip galvanized product

    • Excellent Anti-corrosive property on the flat surfaces / Anti-corrosive property on cut edges / Strong anti-corrosive property against acid rain

    • High corrosion resistance against neutral salt (High efficiency of guardrail at sea side)

    Corrosion of buried post

    comparison between new & old product

    PosMAC Galvanizing product
    PosMAC Steel Hot dip galvanized steel
    product
    Feature

    • High corrosion-resistant alloy coating steel sheet

    • magnesium(Mg) + Aluminum(AI) + Zinc(Zn)

    • Guidelines of Ministry of Land / Complete revision and announcement of Korea Expressway Corporation's specifications

    • Excellent corrosion resistance on planar portion

    • Excellent corrosion resistance on planar portion / prevention of corrosion on cutting part

    • Strong with acid rain

    • Very strong anti-corrosion with salt

    • Strong to corrosion from road calcium chloride

    • Plating on steel sheet(molten zinc)

    • The life time of the guardrail is about 10 years and getting rust on reclaimation post from field(deterioration)

    • Early discoloration of bleaching and color after installation in the field

    • Large difference with hot dip galvanized apperanance quality

    • weak with salt and easily come out rust after installation 2 years

    • Easy corrosion from road calcium chloride
    PosMAC (275g/㎡) Hot dip galvanized steel(550g/㎡)
    Comparison result of corrosion resistance

    PosMAC is 3 times higher corrosion-resistant properties than conventional hot-dip galvanized product

    ※ test method

    CCT salty water spray test (galvanized product occurred red rust from 90 cycle)
    (Salty water spray 2Hr -> Dry 4Hr - Humidity 2Hr) Check the sample after 1 cycle

    PosMAC Roadside/Elevated ground Open type Guardrail SB4 Degree

    • Name of goods KG-KSI-GP454-SB4-1
      Unit Span
      Standard W2000×H855mm
      Commodity identification number 23315764
      Note Plating
    • Name of goods KRKSI-GP454-SB4-1
      Unit Span
      Standard W2000×H855mm
      Commodity identification number 23315768
      Note Painting of upper part
    • Name of goods KRKSI-GP454-SB4-2
      Unit Span
      Standard W2000×H855mm
      Commodity identification number 23315767
      Note Painting

    PosMAC Transition section Guardrail SB4 Degree

    • Name of goods KRKSI-J-GP454-SB4
      Unit Place
      Standard W12000×H880mm
      Commodity identification number 23315754
      Note Plating