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Low-alloy and corrosion-resistant steel for vehicle, having improved corrosion resistance under corrosive environment, and preparation method thereof

  • US 10,640,839 B2
  • Filed: 11/01/2017
  • Issued: 05/05/2020
  • Est. Priority Date: 05/10/2017
  • Status: Active Grant
First Claim
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1. A low-alloy and corrosion-resistant steel for a vehicle, comprising:

  • about 0.001 wt % to about 0.1 wt % of C, about 0.01 wt % to about 0.5 wt % of Si, about 0.1 wt % to about 0.6 wt % of Mn, more than 0 wt % and about 0.18 wt % or less of P, more than 0 wt % and less than about 0.02 wt % of S, about 0.001 wt % to about 0.03 wt % of Nb, more than 0 wt % and about 0.03 wt % or less of Cr, about 0.05 wt % to about 0.3 wt % of Cu, about 0.05 wt % to about 0.2 wt % of Ni, about 0.05 wt % to about 0.1 wt % of Sn and about 0.05 wt % to about 0.15 wt % of Sb, and the balance iron and inevitable impurities,wherein the low-alloy and corrosion-resistant steel includes Cu-Sb layer,wherein the low-alloy and corrosion-resistant steel is plated with a Al based material, andwherein the Al based material comprises more than 0 wt % and less than about 3 wt % of Mg, about 5 wt % to about 15 wt % of Si, and the balance Al and inevitable impurities.

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