Steel sheet for containers, and method for producing steel sheet for containers
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United States of America Patent
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Dec 1, 2020
Grant Date -
Jul 5, 2018
app pub date -
Jun 23, 2015
filing date -
Jun 23, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A steel sheet for containers including a steel sheet, a Sn coated layer that is formed on at least one surface of the steel sheet, and a chemical treatment layer that is formed on the Sn coated layer. A variation amount in a yellowness index measured at one measurement point on the outermost surface of the chemical treatment layer is defined as ΔYI, and represented by ΔYI=YI−YI0, wherein YI is the yellowness index measured after the steel sheet for containers is subjected to a retort treatment at a temperature of 130° C. for 5 hours, and YI0 is the yellowness index measured before the retort treatment. An average of absolute values of the ΔYI obtained at a plurality of measurement points included in a unit area of the outermost surface is 5.0 or less.
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International Classification(s)
- C23C:COATING METALLIC MATERIAL; COATING MATERIAL WITH M....
- C25D:PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC ....
- C21D:MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS....
- C23F:NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM S....
- C22C:ALLOYS
- B32B:LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA....
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