The present disclosure relates to a container for steel.
BACKGROUND
[0002]
　The material used in the container, there is a case where the plated steel sheet is used (e.g., see Patent Documents 1-8). Then, as the container plated steel sheet is used, for example, two-piece cans and three-piece cans.
[0003]
　The two-piece can is that the can bottom and the can body is a can body is integrated, DrD (Draw and Redraw) cans, DI (Drawing and Ironing) cans are known. 2-piece cans, drawing, ironing, bending unbending process, or is shaped by combining these processing. The plated steel sheet used in these can body, for example, tin (Sn plated steel sheet) and TFS (Tin Free Steel: electrolytic chromic acid treated steel sheet), with proper use of the plated steel sheet is performed depending on the application and processing method ing.
[0004]
　3-piece can is that the can body and the can body and the bottom becomes different. 3-piece cans, welding can performed by electric resistance welding production of can body is the mainstream. The bottom plate of the welded can, TFS is used, the cylinder member of the welded can, diluted with Sn-plated steel sheet, and Ni-plated steel sheet is used.
[0005]
　Patent Document 1: JP 2000-263696 Patent Publication
　Patent Document 2: JP 2000-334886 Patent Publication
　Patent Document 3: Japanese Patent No. 3060073 discloses
　Patent Document 4: Japanese Patent No. 2998043 discloses
　Patent Document 5: JP 2007-231394 Japanese
　Patent Document 6: JP 2000-26992 JP
　Patent Document 7: JP 2005-149735 JP
　Patent Document 8: Japanese Patent No. 4886811
Summary of the Invention
Problems that the Invention is to Solve
[0006]
　In two-piece can and three-piece cans as described above, in order to appeal the commercial value to the consumer, the print is subjected to Kangaimen. Further, the inner surface of the can, in order to ensure the corrosion resistance, resin is coated.
　Conventional two-piece cans, after the forming of can body, coating a spray or the like is applied to the can inner surface side, a curved surface printing has been subjected to Kangaimen side. However, in recent years, in advance PET film is canning from the laminate was laminated steel sheet were laminated two-piece can has emerged (e.g., see Patent Documents 1 and 2.).
　Also in welded can, conventionally, the inner surface of the can coating is applied, and that the printing is performed steel sheet is welded to Kangaimen, the can body was manufactured. However, in recent years, to prepare a PET film previously printed is applied instead of the coating, also on the rise 3-piece can using a laminated steel sheet according PET film was laminated (for example, the following Patent Documents 3 and see Patent Document 4.).
[0007]
　The above two-piece can, drawing, ironing, bending unbending process or the like is performed. Further, the three-piece cans, the neck machining, flanging, expanding process for design property is applied in some cases. Therefore, the laminated steel sheet, excellent film adhesiveness can follow these processing have been highly required. Sn-plated steel sheet has excellent corrosion resistance in the contents of the acidic by excellent sacrificial protection effect of Sn. However, since the outermost layer of the Sn plated steel sheet is present fragile Sn oxide film adherence is unstable. Moreover, Sn-plated steel sheet, when processing the cans, 1) if the peeling of the film from the Sn plated steel sheet is produced, and, 2) in some cases due to film adhesion insufficient becomes corroded origin.
[0008]
　Therefore, excellent workability and film adhesion, and welding capable Ni-plated steel sheets, are used as laminated steel (e.g., see Patent Document 5.). Appearance of Ni-plated steel sheet, although like luster Sn plated steel sheet is not, it is also reported that by Ni plating methods are possible bright plating (e.g., see Patent Document 6 and Patent Document 7.) .
[0009]
　Further, the interior of the produced can body, fish, vegetables, when filled with food such as beans, proteins heat sterilization processes included in these foods (e.g., retorted) partly decomposed in the step is the S component generated to. Then, S component generated is combined with Ni forming NiS black and (sulfide blackening), it is known that some cases degrade the inner surface quality of the can. Therefore, Ni-plated steel sheet, further improvement of sulfurization blackening has been demanded.
[0010]
　The present disclosure has been made in view of the above problems, it is an object of the present disclosure provide better sulfidation blackening, corrosion resistance, adhesion, and the container steel sheet having both weldability It lies in the fact.
Means for Solving the Problems
[0011]
　The means for solving the above problems includes the following aspects.
(1) and the steel plate, positioned on at least one surface of said steel sheet, the amount of adhesion, per side 0.3 ~ 3 g / m of a metal Ni content 2 and the Ni plating layer is located on the Ni plating layer, the chromate It includes a coating or Zr coating, wherein the Ni plating layer contains ZnO particles of from 0.1 to 20% by weight per side of metal Zn amount, the container for the steel sheet.
(2) the Ni plating layer contains ZnO particles of from 0.5 to 15% by weight per side of metal Zn amount, the container for steel sheet according to (1).
(3) the chromate film is, per side 1 ~ 40 mg / m of a metal Cr content 2 containing Cr of, container steel sheet according to (1) or (2).
(4) the Zr coating, per side 1 ~ 40 mg / m of a metal Zr weight 2 containing Zr, the container steel sheet according to (1) or (2).
The invention's effect
[0012]
　According to the present disclosure, it is possible to provide better sulfidation blackening, corrosion resistance, adhesion, and the container steel sheet having both weldability.
DESCRIPTION OF THE INVENTION
[0013]
　In the present specification, the numerical range expressed using "to" means a range including numerical values described before and after "to" as the lower and upper limits.
　As used herein, the term "process" not only separate steps, if even that can not be clearly distinguished from other processes intended purpose of the process is achieved, the term include.
　As used herein, the term "steel sheet" means a steel sheet prior to applying the Ni plating layer, a chromate film or Zr coating. In the following description, the Ni plating layer, the steel sheet prior to application of the chromate film or Zr film may be referred to as "be plated".
　As used herein, "container for steel" means a steel sheet subjected to Ni plating layer, a chromate film or Zr coating.
　In the present specification, when simply referred to as adhesion, the term "adhesion" is paint adhesion means the adhesion, including secondary paint adhesion and film adhesion.
[0014]
　The following describes in detail an example of a preferred embodiment of a container for the steel sheet of the present disclosure.
[0015]
　Container steel sheet of the present disclosure, sulfidation blackening, corrosion resistance, adhesion, and is a container for a steel sheet having excellent weldability. The container steel sheet of the present disclosure, for example, those which can be used in two-piece can and three-piece cans. In the following, the container steel sheet of the present disclosure will be described in detail.
[0016]
　The Ni-plated steel sheet Ni-plated when applied to beverage cans, less if degrade the inner surface quality of the can and had a sufficient sulfidation blackening. However, when applied to a food can be filled with the aforementioned food as contents, further improvement in sulfidation blackening is demanded.
　The present inventors have conducted extensive studies to address the above problems. As a result, the present inventors, a ZnO particles, by dispersing and containing the Ni plating layer, to obtain a knowledge that can prevent sulfide blackening.
[0017]
　ZnO particles are particles that can collect S is responsible for the sulfide blackening as ZnS. However, when forming an extremely thin Ni-plated layer on the steel sheet to be used as conventional containers for the steel sheet, there was no technique of including the fine ZnO particles are insulating material Ni plating layer.
　Incidentally, ZnO particles, it is conceivable to be contained in the chromate film or Zr coating on the Ni plating layer. However, the thickness of these coatings is smaller than the average particle size of the ZnO particles, ZnO particles often become exposed from these coatings. Therefore, it is actually difficult to incorporate into these coatings.
　The original of these findings, went further consideration. As a result, the present inventors have found that by controlling the content of ZnO particles of the Ni plating layer, the corrosion resistance with the Ni plating, adhesion, and without impairing the weldability, to improve the sulfidation blackening It was heading.
[0018]
(Plating on the original sheet)
　A container for steel sheet of the present disclosure, steel plated original plate to be used as the base material is not particularly limited. As steel sheet used as a plating original sheet, the conventional billet manufacturing processes, conventional steel production process (hot rolling, Sansaki, cold rolling, annealing, temper rolling and the like) various known manufactured through steel plate is available.
[0019]
(For Ni plating layer)
　container steel sheet of the present disclosure, better sulfidation blackening, the corrosion resistance, in order to achieve the adhesion and weldability, against one or both sides of the above be plated, the ZnO particles Ni plating containing is performed, Ni plating layer is formed. Ni is, corrosion resistance, adhesion, and a metal having both weldability. Then, Ni plating layer which has been subjected to the steel sheet as a plating original plate is, Ni plating amount, 0.3 g / m as metal Ni amount per surface 2 by the above, a practical corrosion resistance, adhesion and weldability exhibit. Furthermore the Ni coating weight increases, the corrosion resistance with the increase of the Ni coating weight, adhesion, and weldability are improved. On the other hand, Ni plating amount, 3 g / m metal Ni amount per surface 2 by weight, the corrosion resistance, adhesion, and the effect of improving weldability saturated. Therefore, excess Ni plating amount is disadvantageous in industry. Thus, Ni plating amount of metal Ni amount per surface, 0.3 g / m 2 or more 3 g / m 2 or less. Ni plating amount is preferably a metal Ni amount per surface, 0.5 g / m 2 or more 2.5 g / m 2 or less, more preferably, 0.5 g / m 2 or more 1.5 g / m 2 less. The metal Ni amount represents a metal Ni equivalent amount.
[0020]
　For such Ni plating layer, it is contained in ZnO particles are present in a state in which ZnO particles are dispersed in the Ni plating layer. ZnO particles used in containers for steel plate of the present disclosure, it is not particularly defined, it is possible to use a known ZnO particles which are commercially available. As mentioned above, ZnO particles of Ni plating layer improves the sulfidation blackening. The content of ZnO particles, based on the total weight of the Ni plating layer, by a 0.1 mass% or more metals Zn amount per surface, such sulfidation blackening improving effect is achieved. On the other hand, ZnO particles because it is an insulator, when the content of ZnO particles too much, weldability is inhibited in performing the electric resistance welding, welding failure. Such welding defects, the content of ZnO particles becomes remarkable when it exceeds 20% by mass Zn metal amount per one surface. Therefore, the content of ZnO particles of Ni plating layer is 20 wt% or less Zn metal amount per one surface. The content of ZnO particles of Ni plating layer is a Zn metal amount per surface, preferably, 0.5 wt% to 15 wt%, more preferably 0.5 mass% to 7 mass% . The metal Zn amount represents a metal Zn equivalent amount.
[0021]
　The size of the ZnO particles contained in the Ni plating layer (mean particle size of the ZnO particles) are not particularly defined. The size of the ZnO particles may be larger than the plating thickness of the Ni plating layer may be smaller. However, the size of the ZnO particles exceeds plating thickness of Ni plating layer, during transport and processing, there is a case where ZnO particles may peel off. Therefore, the size of the ZnO particles is preferably not more than plating thickness of the Ni plating layer, it is more preferably not more than half of the plating thickness. The average particle size of ZnO particles used in forming the Ni plating layer is not particularly limited, for example, 20 nm ~ 200 nm. The average particle diameter of the ZnO particles represents the value calculated from the particle size distribution obtained in ISO13320 and JIS Z 8825-1 laser diffraction scattering process in conformity to (2001). ZnO particles, as commercially available, for example, such as zinc oxide manufactured by Sakai Chemical Industry Co., Ltd. are available.
[0022]
　As a method for imparting Ni plating layer containing ZnO particles described above is not particularly defined. For example, a known acidic Ni plating solution (e.g., sulfuric Ni, composed acidic Ni plating solution from chloride Ni) method which performs cathode electrolysis using a solution in which the ZnO particles are dispersed with respect to the industrially useful for it is. Moreover, to such solutions, a dispersing agent to prevent aggregation of ZnO particles may also be added. The content of ZnO particles to be contained in the Ni plating layer can be controlled by the content of ZnO particles to be dispersed in the solution. In general, the increased dispersion of ZnO particles in the solution, there are many tends also the content of ZnO particles contained in the Ni plating layer.
　Incidentally, ZnO particles contained in the Ni plating layer, ZnO particles alone may be dispersed in a nearly uniform state. Moreover, aggregates of ZnO particles in a range not to exceed the plating thickness of Ni plating layer may be dispersed.
[0023]
(Chromate for coating)
　for containers steel sheet of the present disclosure, in order to ensure excellent corrosion resistance and adhesion (especially secondary paint adhesion), the upper layer of the above Ni plating layer, chromate treatment is applied, the chromate film There is formed. Such chromate treatment, for example, 1) chromate film having a single layer structure containing a hydrated oxide Cr, or, 2) containing a metal of Cr underlayer (Ni plating layer side of the layer), the upper layer (surface layer of the container for steel chromate film a multilayer structure containing a hydrated Cr oxide on the side of the layer) is applied on the upper layer of Ni plating layer.
[0024]
　Metal Cr or hydrated Cr oxide constituting the chromate coating has excellent chemical stability. Therefore, corrosion resistance of the container steel sheet is improved in proportion to the chromate coating amount. Further, hydrated Cr oxide exhibits excellent adhesion even in a heated water vapor atmosphere by making a strong chemical bond with the functional groups of the coating film. Therefore, as the becomes large adhesion amount of the chromate film, the adhesion is improved. In practice, in order to exhibit a sufficient corrosion resistance and adhesion, a metal Cr equivalent amount, per side 1 mg / m 2 is preferably provided with a more chromate film. The increase of chromate coating weight also increases the effect of improving the corrosion resistance and adhesion. On the other hand, since the hydrated Cr oxide in the chromate film is electrically insulating, the electric resistance is very high, a factor to degrade the weldability. Chromate coating amount, a metal Cr equivalent amount, per side 40 mg / m 2 by weight, very weldability is deteriorated. Therefore, the amount of chromate film, a metallic Cr equivalent amount, per side 40 mg / m 2 is preferably not more than. Coating weight of chromate film, more preferably, a metal Cr equivalent amount, per side 3 mg / m 2 or more 20 mg / m 2 or less.
[0025]
　Incidentally, chromate treatment method is not particularly defined. For example, chromate treatment, various Cr salt (sodium salt, potassium salt, ammonium salt, etc.) processing method with an aqueous solution of the like. Chromate treatment using a Cr salt solution of the various is any processing method (dipping, spraying, electrolytic treatment, etc.) may be performed in. For example, chromate treatment, with respect to Cr acid, sulfate ion, (. Including complex ions) fluoride ions or be subjected to a cathodic electrolysis treatment mixtures thereof in an aqueous solution was added as the plating aid, industrially It is also excellent.
[0026]
(For Zr film)
　container steel sheet of the present disclosure, the upper layer of the above Ni plating layer, in place of the chromate coating may be Zr film containing zirconium compounds have been formed. Zr coating, Zr compound (oxide Zr, phosphate Zr, etc.) is that of a film containing. Zr coating, the same mechanism as the above chromate coating, significant improvement in adhesion and corrosion resistance is observed. In practice, in order to exhibit a sufficient corrosion resistance and adhesion, Zr coating weight is a metal Zr amount, per side 1 mg / m 2 is preferably not less than. On the other hand, Zr coating, since the electric resistance is very high because it is electrically insulating, and is a cause of deterioration of the weldability. Zr coating weight is a metal Zr amount, per side 40 mg / m 2 by weight, the weldability occurs as described above becomes remarkable, also, the appearance is deteriorated. Accordingly, Zr coating weight is a metal Zr amount, per side 40 mg / m 2 is preferably not more than. Adhesion amount of Zr coating, more preferably, a metal Zr amount, per side 3 mg / m 2 or more 20 mg / m 2 or less. The metal Zr amount represents a metal Zr in terms of amount.
[0027]
　A method of imparting Zr coating is not particularly defined. For example, an acidic solution (fluoride Zr, phosphate Zr, etc.) mainly composed of hydrofluoric acid in a method of performing immersion or cathodic electrolysis treatment (e.g., see Patent Document 8.) Or the like may be used.
[0028]
(Method of measuring the adhesion amount, etc.)
　The above-mentioned Ni plating amount, the content of ZnO particles, chromate coating amount, and, Zr coating amount can be measured by, for example, calibration curve method using X-ray fluorescence is there.
　For example described Ni plating amount. First, the metal Ni amount granted to prepare a plurality of test strips are known. Then, each test piece, by a fluorescent X-ray apparatus, the surface of the Ni plating layer, measuring the intensity of fluorescent X-ray derived from the Ni in advance. Then, prepare a calibration curve showing the relationship between the intensity and the metal Ni amount of measured fluorescence X-rays. On top of that, the container steel sheet in question, to remove the chromate film or Zr coating vessel steel plate surface, to prepare a test piece to expose the Ni plating layer. By this expose the Ni plating layer surface fluorescent X-ray apparatus, for measuring the intensity of the fluorescent X-ray derived from the Ni. By using the obtained fluorescent X-ray intensity and a previously prepared calibration curve, the Ni coating weight per one side, the metal Ni equivalent amount, can be identified.
　The content of ZnO particles, chromate coating amount, and, for the Zr coating amount can be determined in the same manner as Ni plating amount described above. Specifically, Zn of ZnO particles, Cr of chromate film, and the intensity of the fluorescent X-rays from each metal element of Zr Zr film was measured by the above calibration curve method, the content of ZnO particles per surface rate, and it can measure the amount of film of chromate film and Zr coating per surface.
　Incidentally, the content of ZnO particles, as well as the measurement of the Ni plating amount, to remove the chromate film or Zr film by X-ray fluorescence surface to expose the Ni plating layer, measured X-ray intensity from Zn to. Further, the amount of chromate film or Zr coating weight, these coating surface by X-ray fluorescence to measure the X-ray intensity from Cr or Zr.
[0029]
　The average particle size of such ZnO particles (equivalent circle diameter) in the case of post-measure is a sectional SEM (Scanning Electron Microscope: scanning electron microscope) observation or TEM (Transmission Electron Microscope: TEM) observation It can be measured by. Specifically, to remove the chromate film or Zr coating, the surface to expose the Ni plating layer was observed by SEM device, it can be expressed as the average value of equivalent circle diameter for allowed ZnO particles in the observation field of view it is.
[0030]
　Incidentally, containers for steel sheet of the present disclosure, and the steel plate, at least located on one side, the adhesion amount of the steel sheet, per side 0.3 ~ 3 g / m with the amount of Ni 2 A Ni plating layer is, Zn amount a Ni plating layer containing ZnO particles of from 0.1 to 20 mass% per one surface in, located on the Ni plating layer has a chromate film or Zr coating, a steel plate and the Ni plating layer and the chromate film or and Zr coating may comprise in this order.
　Although the container steel sheet of the present disclosure has been described in detail.
Example
[0031]
　Next described embodiment of a container for the steel sheet of the present disclosure will be specifically described container steel sheet of the present disclosure. Incidentally, embodiments described below, merely only one example of a container for the steel sheet of the present disclosure, the container for the steel sheet of the present disclosure is not limited to the following examples.
[0032]
　In the following, the container steel sheet of the present disclosure, the test material was produced by the following method of (1), for each item shown in (A) ~ (F) of (2) was subjected to performance evaluation. The results obtained are shown in Table 1 below.
[0033]
(1) Test material preparation method
　, be plated: thickness 0.2 mm, temper grade 3 cold-rolled steel sheet (T-3), was used as the plating original plate.
　· Ni plating condition: concentration of 20% sulfuric acid Ni, 15% strength Ni chloride and contains a concentration of 1% boric acid was prepared solution adjusted to pH 5.5. To this solution, an average particle diameter of 20 nm, 60 nm, was added ZnO particles 120nm or 200nm solid content 0.1-1%. Using such a solution, the current density of 5A / dm 2 performs cathode electrolysis in, to form a Ni plating layer on both surfaces of the steel sheet is plated original plate. Ni coating weight, the electrolysis time by adjusting the range of 0.1 to 10 seconds, was controlled.
　In addition, ZnO particles, using ZnO particles manufactured by Sakai Chemical Industry Co., Ltd.. The average particle diameter of the ZnO particles, represents the value calculated from the particle size distribution obtained by a laser diffraction scattering method conforming to ISO13320 and JIS Z 8825-1.
[0034]
　Chromate treatment conditions: concentration of 10% oxidizing Cr (VI), 0.2% concentration of sulfuric acid, and, in a solution containing a concentration of 0.1% of ammonium fluoride, a current density of 10A / dm 2 cathodic electrolysis of It was carried out. Thereafter, by washing with water for 10 seconds, with respect to steel plate Ni plating layer was formed was applied a chromate film. Coating weight of chromate film, the electrolysis time by adjusting the range of 0.1 to 10 seconds, was controlled.
[0035]
　· Zr film processing conditions: a concentration of 5% fluoride Zr, concentration of 4% phosphoric acid, and, in a solution containing a concentration of 5% hydrofluoric acid, current density 10A / dm 2 performs cathode electrolysis, Ni plating the layer is formed steel sheet imparted with Zr coating. Adhesion amount of Zr coating is by adjusting at electrolysis time of from 0.1 to 10 seconds, was controlled.
[0036]
(2) Sample Evaluation Method
(A) sulfidation blackening
　the test materials prepared in (1), an epoxy - phenol resin 70 mg / dm 2 was applied, 200 ° C., after baking at 30 minutes, 0.6% Cysteine 130 ° C. in hydrochloride solution was immersed for 2 hours (sulfidation blackening 1).
　The epoxy - phenol resin 70 mg / dm 2 after baking the coating to the above conditions, 130 ° C. to 0.6% cysteine hydrochloride solution was immersed for 2 hours, the dipping was performed twice (sulfidation blackening 2).
　For sulfidation blackening 1 and sulfidation blackening 2, blackening situation, determined in four steps shown below to evaluate the sulfidation blackening. It should be noted that, among the evaluation of the following four stages, was passed more evaluation "B".
[0037]
　A: absolutely blackening is not observed
　B: blackening of the area ratio of 0% and less than 1%
　C: blackening of the area of 1 percent 5%
　D: blackening of the area ratio exceeds 5%
[0038]
(B) corrosion resistance
　to the test material prepared in (1), an epoxy - phenolic resin 80 mg / dm 2 was applied, 200 ° C., after baking at 30 minutes, was crosscut of depth reaching the base steel. Such test material, 1.5% strength citric acid - was immersed for 72 hours in a test solution of 45 ° C. consisting concentration of 1.5% sodium chloride mixture. After washing and drying of the test material, adhesive tape: perform peeling (trade name cellophane tape (registered trademark)), it was observed and corrosion conditions of the coating film corrosion under conditions and the flat plate portion of the cross-cut portion. From both the evaluation of the corrosion area ratio of the width and the flat plate portion of the coating film corrosion under determines the following four stages, to evaluate the corrosion resistance. It should be noted that, among the evaluation of the following four stages, was passed more evaluation "B".
[0039]
　A: less than under coating corrosion width 0.2mm and
　0% B: less than coating corrosion under width 0.2mm or 0.3 mm, and 0% or less than 1% corrosion area ratio of the flat plate portion
　C: less than coating corrosion under width 0.3mm or 0.45mm, and the flat portion of the corroded area ratio greater than 1% 5%
　D: coating corrosion under width 0.45mm or more, or, corroded area ratio of the flat plate portion more than 5%
[0040]
(C) processability
　on both sides of a test material prepared in (1), a PET film having a thickness of 20μm was laminated at 200 ° C., it was punched laminated with test material to a diameter of 150 mm. Thereafter, the film side to the inner surface, subjected to can manufacturing processing by drawing and ironing, to prepare a DI can having a diameter of 66 mm, height 120 mm. Flaw of the film, float, to observe the peeling was evaluated workability in four steps from these area ratio. It should be noted that, among the evaluation of the following four stages, was passed more evaluation "B".
[0041]
　A: scratches of the film, lifting, peeling no
　B: scratches of the film, lifting, the area ratio of peeling is less 0% and 0.5%
　C: scratches of the film, lifting, the area ratio of peeling 0.5% ultra than 15%
　D: defect of the film, lifting, peeling area ratio of 15 percent, or broken unworkable
[0042]
(D) Weldability
　using a wire seam welding machine, by changing the current in the welding wire speed 80 m / min conditions were welded test material prepared in (1). Sufficient and minimum current value welding strength is obtained, the welding defects and comprehensive evaluation of extent of the proper current range comprising the maximum current value (such as dust and welding spatter) starts conspicuous, the following 4 stages weldability in were evaluated. It should be noted that, among the evaluation of the following four stages, was passed more evaluation "B".
[0043]
　A: proper current range of the secondary side current: 1500A or
　B: proper current range of the secondary side current: 800A or more 1500A less
　C: proper current range of the secondary side current: 100A or more 800A less
　D: the secondary current appropriate current range: less than 100A
[0044]
(E) coating adhesion
　to the test material prepared in (1), an epoxy - phenolic resin 70 mg / dm 2 was applied, 200 ° C., after baking at 30 minutes of conditions, the depth of which reaches the base iron at 1mm intervals put a cross cut. Thereafter, the adhesive tape: peeling the coating film (trade name cellophane tape (registered trademark)), was observed peeling situation. From the release area ratio, the paint adhesion was evaluated by the following four stages. It should be noted that, among the evaluation of the following four stages, was passed more evaluation "B".
[0045]
　A: Peeled area ratio:
　0% B: peeled area ratio: 0% over 5%
　C: Peeled area ratio: 5% or less over 30%
　D: Peeled area ratio: 30% ultrapure
[0046]
(F) Secondary coating adhesion
　to the test material prepared in (1), an epoxy - phenolic resin 70 mg / dm 2 was applied, 200 ° C., after baking at 30 minutes of conditions, deep reaching the base steel at 1mm intervals put the difference in the cross-cut. Thereafter, 125 ° C., for 30 minutes of conditions, treatment by heating water vapor atmosphere (the retort treatment). After drying, the adhesive tape: peeling the coating film (trade name cellophane tape (registered trademark)), was observed peeling situation. From the release area ratio, a secondary paint adhesion property was evaluated by the following four stages. It should be noted that, among the evaluation of the following four stages, was passed more evaluation "B".
[0047]
　A: Peeled area ratio:
　0% B: peeled area ratio: 0% over 5%
　C: Peeled area ratio: 5% or less over 30%
　D: Peeled area ratio: 30% ultrapure
[0048]
(G) Film adhesion
　to both surfaces of the test materials prepared in (1) was laminated at 200 ° C. The PET film having a thickness of 20 [mu] m, it was punched laminated with test material to a diameter of 150 mm. Thereafter, the film side performing drawing and ironing on the inner surface, to prepare a DI can having a diameter of 66 mm, height 120 mm. Thereafter, 125 ° C., subjected to retort treatment at 30 min to observe the state of peeling of the film. From the release area ratio, the film adhesion was evaluated by the following four grades. It should be noted that, among the evaluation of the following four stages, was passed more evaluation "B".

WE claims

And the steel plate, positioned on at least one surface of said steel sheet, the amount of adhesion, per side 0.3 ~ 3 g / m of a metal Ni content 2 and the Ni plating layer is,
　positioned on the Ni plating layer, a chromate coating or Zr and the film,
provided with,
　the Ni plating layer contains ZnO particles of from 0.1 to 20% by weight per side of metal Zn amount, the container for the steel sheet.
[Requested item 2]
　The Ni plating layer contains ZnO particles of from 0.5 to 15% by weight per side of metal Zn amount, the container for steel sheet according to claim 1.
[Requested item 3]
　The chromate coating, per side 1 ~ 40 mg / m of a metal Cr content 2 containing Cr of, container steel sheet according to claim 1 or 2.
[Requested item 4]
　The Zr coating, per side 1 ~ 40 mg / m of a metal Zr weight 2 containing Zr, the container steel sheet according to claim 1 or 2.