US3392014A - Steel plates for cans used for canning carbonated drinks - Google Patents

Steel plates for cans used for canning carbonated drinks Download PDF

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Publication number
US3392014A
US3392014A US548668A US54866866A US3392014A US 3392014 A US3392014 A US 3392014A US 548668 A US548668 A US 548668A US 54866866 A US54866866 A US 54866866A US 3392014 A US3392014 A US 3392014A
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United States
Prior art keywords
steel
content
sulfur
phosphorus
steel plate
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Expired - Lifetime
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US548668A
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Inventor
Yonezaki Shigeru
Hiromae Yoshitaka
Asano Hidejiro
Yamamoto Fumio
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Yawata Iron and Steel Co Ltd
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Yawata Iron and Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur

Definitions

  • Steel cans have been widely used at present for refreshing drinks, fruit juices and the like and these steel cans are required to have the corrosion resistance of longer than 6 months.
  • the steel cans which are marketed at present or have standardized chemical compositions are provided with sufficient corrosion resistance as cans for substances containing organic acids such as fruit juice, etc., but their corrosion resistances are insufficient for carbonated drinks. That is, in the case of using such a steel can for canning carbonated drinks, corroded holes are very easily formed at the can walls. This is because the corrosion mechanism by the carbonated drink is different from that by a drink containing an organic acid, such as, fruit juice.
  • the steel plate for the can having the above-mentioned known composition is generally tinplated and hence the plated tin acts electrochemically as anode to the base metal when the can contains the juice. Therefore, even in the case where the base metal of the steel plate is exposed to the organic acid at the pin-holed portions of the plating surface, the exposed base metal can also be protected sufiiciently by the tin electrochemically.
  • the base iron of the tin-plated steel can acts as anode to the plated tin in a carbonated drink, the base iron exposed at the pin-holed portions cannot be protected by the plated tin and hence an accident easily occurs that the exposed base metal of the can is dissolved out to form perforations.
  • An object of this invention is to provide a steel plate for can having a high corrosion resistance to carbonated drinks by adjusting the composition of the steel plate.
  • Another object of this invention is to provide at a low cost a steel plate for cans used for canning carbonated drinks.
  • the accompanying drawing is a graph showing the relation between the amounts of P and S contained in a steel plate and the corrosion resistance of the plate to a carbonated drink.
  • S-containing free-cutting steel for example, A.I.S.I. C 1108, C 1109, etc.
  • sulfur is added to improve the cutting property of steel and hence the known art is completely different from our invention in the purpose of the addition of sulfur and the field of using the S-containing steel.
  • sulfur is incorporated in a steel can for a carbonated drink of a phosphoric acid base in such amount that the content of sulfur is larger than the content of phosphorus present in the steel.
  • the content of sulfur must be less than 0.1%.
  • the content of sulfur must be always larger than that of phosphorus and the lower limit of sulfur shall be determined considering the relation with the content of phosphorus, but if the content of sulfur is less than 0.02%, suffi-cient corrosion resistance to the carbonated drink cannot be obtained. That is, in the present invention it is necessary that the content of sulfur is equivalent to or higher than the content of phosphorus in the S-content range of 0.02 to 0.1%, preferably 0.025 to 0.040%.
  • the content of phosphorus is preferably small.
  • the corrosion resistance of such a steel can sufiiciently be increased if the ratio of S/P in the steel is higher than 1 in accordance with this invention without forcibly reducing the content of phosphorus.
  • the content of phosphorus may be less than 0.1% (not including 0.1%
  • the content of sulfur is defined to be 0.01 to 0.1%, which makes unnecessary the severe conditions about desu-lfurization, and sulfur is'rather added positively as the case may be.
  • steel plates having desired corrosion resistance can be obtained very economically.
  • sulfur is very effective as an element for suppressing the corrosion promoting action of phosphorus in a steel plate as a can for a carbonated drink containing phosphoric acid as the base.
  • copper is effective for suppressing the corrosion promoting action of phosphorus.
  • the action of copper is similar to the aboyementioned action by sulfur, and in the case of adding copper in steel, the content must be higher than that of phosphorus and preferably be 0.1-0.3%.
  • the substance to be charged is a specific one
  • sulfur or copper may be added as the corrosion suppressing agent according to the kind of the carbonated drinks but if sulfur and copper are added at the same time, the steel cans can be used for canning both kinds of carbonated drink-s.
  • the content of sulfur is also of course adjusted to 0.02 to 0.1% such that the ratio of P/S is less than 1.
  • the steel plate having sufiicient corrosion resistance to any kinds of carbonated drinks can be obtained.
  • the content of copper is defined to the above mentioned range since if the content is less than 0.1% the sutficient corrosion resistance to the carbonated drink cannot be obtained, while if the content is higher than 0.3% the presence of copper causes cracking or surface roughening of the steel plate during hot working.
  • phosphorus and sulfur and/or copper may be present 0.02 to 0.20% of carbon, less than 0.3% of silicon and 0.02 to 1.0% of manganese.
  • the content of C is defined as above since the content of C in steel is less than 0.02%, the steel becomes too soft to provide a necessary strength and further if the content is higher than 0.2% cold rolling for the steel becomes difiicult.
  • Si is added in the system during the production of steel for the purpose of refining but the content of Si shall be defined to be less than 0.3%. If the content of Si is higher than the value, the workability of the steel is reduced, which makes the steel unprofitable for can making materials.
  • Mn is added in order to prevent the steel from becoming hot fragile by the presence of sulfur as well as to obtain mechanical properties such as hardness and tensile strength necessary for the production of cans, but it is necessary that the content of Mn is from three times to ten times as large as that of S in a range of the Mn ingot was, after blooming, subjected to hot rolling and cold rolling.
  • the hot rolling conditions were as follows:
  • Sample No. 5 stands for a conventional steel plate. As shown in the table the life of the conventional steel plate is less than that of the can material of this invention shown in the table as sample numbers 1 to 4 while the former contains a lower amount of P and S than the latter, which shows that the steel can of this invention has a very excellent corrosion resistance.
  • EXAMPLE 2 Steel ingot containing various components wa manufactured by melting each of the test material in a converter while reducing the content of P as low as possible and then adding a desired amount of S and Cu into the molten steel and, after blooming, was subjected to hot rolling and cold rolling to provide the steel plate of 0.25 mm. in thickness.
  • the hot rolling conditions were same as in Example 1.
  • the steel plate was subjected to skin pass rolling at a reduction ratio of 1%.
  • the steel plate was plated with tin in the thickness of 0.4 micron and after coating with a lacquer, made can.
  • Table 2 The results of conducting corrosion tests about thus prepared steel can while charging therein the carbonated drinks shown in the table are shown in Table 2, in which a test results about a conventional steel can are shown for comparison.
  • the content of Mn in the steel plate for can of this invention is in a range of 0.3 to 0.5%.
  • EXAMPLE 1 The sample material having the com-position shown in below Table l was melted in a converter and at making ingot, sulfur powders were added to adjust the proportion of sulfur. The steel ingot was 12 ton capped ingot. The
  • EXAMPLE 3 The steel can having the composition shown in below Table 3 was prepared by the following steps. That is, a steel ingot was manufactured from a molten steel produced in an experimental vacuum melting furnace. The steel ingot was hot rolled at a finishing temperature of 810-910 C. into a steel plate of 2.3 mm. in thickness and after pickling was cold rolled into the plate of 0.25 mm. in thickness.
  • the cold rolled plate was annealed for 2 hours at 650 C. in a HNX gas atmosphere (C0 0.05% by volume, CO 0.05%, H 310%, and rest N Thereafter, the plate was subjected to skin pass rolling with the reduction ratio of 1% and after pickling was tin-plated.
  • the corrosion test was conducted by immersing thus prepared steel plate in carbonated drinks of citric acid type and tartaric acid type. The results are shown in Table 3.
  • a steel plate as a can material for carbonated drinks comprising 0.02 to 0.20% by weight of carbon, 0.02 to 1.00% by weight of manganese, less than 0.3% by weight of silicon, and at least one member selected from the group consisting of 0.02 to 0.10% by Weight of sulfur and 0.1 to 0.3% by weight of copper, balance being iron References Cited UNITED STATES PATENTS 2,000,932 5/1935 Buchholtz l25 2,056,590 10/1936 Schulz 75125 HYLAND BIZOT, Primary Examiner.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
US548668A 1965-05-12 1966-05-09 Steel plates for cans used for canning carbonated drinks Expired - Lifetime US3392014A (en)

Applications Claiming Priority (1)

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JP2809665 1965-05-12

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US (1) US3392014A (enrdf_load_stackoverflow)
BE (1) BE680833A (enrdf_load_stackoverflow)
DE (1) DE1297874B (enrdf_load_stackoverflow)
GB (1) GB1146311A (enrdf_load_stackoverflow)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2000932A (en) * 1934-01-08 1935-05-14 Link Belt Co Chain link
US2056590A (en) * 1933-05-31 1936-10-06 Vereinigte Stahlwerke Ag Articles with reduced tendency to corrode

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB471568A (en) * 1935-06-07 1937-09-07 Hoesch Koeln Neuessen Ag Fuer Improvements in and relating to the production of conveyor bands

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2056590A (en) * 1933-05-31 1936-10-06 Vereinigte Stahlwerke Ag Articles with reduced tendency to corrode
US2000932A (en) * 1934-01-08 1935-05-14 Link Belt Co Chain link

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BE680833A (enrdf_load_stackoverflow) 1966-10-17
DE1297874B (de) 1969-06-19
GB1146311A (en) 1969-03-26

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