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US 11,566,314 B2Granted
Zinc alloy plated steel material having excellent corrosion resistance after being processed
AssigneePosco
InventorsIl-Ryoung Sohn, Tae-Chul Kim, Jong-Sang Kim
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Abstract
Provided is a plated steel material which can be used for an automobile, a household appliance, a building material, and the like and, more particularly, to a zinc alloy plated steel material having excellent corrosion resistance after being processed and a method for manufacturing the same.
Claims6
A zinc alloy plated steel material having excellent corrosion resistance after being processed, comprising:
- a base steel;
- a zinc alloy plated layer formed on the base steel;
- and
- an inhibition layer formed between the base steel and the zinc alloy plated layer,
- wherein the zinc alloy plated layer comprises, by wt %, 0.5% to 3.5% of magnesium (Mg), 0.5% to 11.0% of aluminum (Al), 10 wt ppm to 350 wt ppm of silicon (Si), a remainder of zinc (Zn) and inevitable impurities,
- the inhibition layer comprises a Si-concentrated layer, and
- a number of Mg2Si phases between the base steel and the zinc alloy plated layer, having a diameter greater than 1000 nm, is 5 or less per 100 μm.
4 more elements
Dependencies are inferred from the claim text.