Claims
- 1. A can or container having a welded seam and fabricated from a hydrated chromium oxide-coated steel strip consisting essentially of:
- a steel strip substrate having two surfaces;
- plated nickel base layers formed on the surfaces of said steel strip substrate and consisting essentially of metallic nickel in an amount of from 150 to 2500 mg per m.sup.2 on each surface of said steel strip substrate, and;
- hydrated chromium oxide-containing coating layers formed on said plated nickel based layers and composed of an underlayer consisting of metallic chromium in an amount of 10 mg or less per m.sup.2 of each surface of said steel strip substrate, and an upper layer consisting of hydrated chromium oxides, the sum of the weights of said underlayer and said upper layer being in the range of 2 to 20 mg, in terms of metallic chromium per m.sup.2 of each surface of said steel strip substrate.
- 2. The welded can or container of claim 1 free from staining, discoloring or both on the weld surface.
- 3. The welded can or container of claim 1 adapted for lacquer bonding and resistant to corrosion under a lacquer coating.
- 4. The welded can or container of claim 1 in which the seam is closed by electric resistance welding.
- 5. A welded can or container having a welded seam, said container fabricated from a hydrated chromium oxide-coated steel strip consisting essentially of:
- a steel strip substrate having two surfaces:
- plated nickel base layers formed on the surfaces of said steel strip substrate and consisting of metallic nickel in a weight of from 150 to 2500 mg per m.sup.2 of each surface of said steel strip substrate;
- hydrated chromium oxide-containing coating layers formed on said plated nickel base layers and composed of an underlayer consisting of metallic chromium in a weight of 10 mg or less per m.sup.2 of each surface of said steel strip substrate, and an upper layer consisting of hydrated chromium oxides, the sum of the weights of said underlayer and said upper layer being in the range of from 2 to 20 mg, in terms of metallic chromium, per m.sup.2 of each surface of said steel strip substrate; and
- a plated tin intermediate layer formed between said plated nickel base layer and said hydrated chronium oxide-containing coating layer, the weight of said tin layer being in the range of from 100 to 2000 mg per m.sup.2 of each surface of said steel strip substrate.
Priority Claims (6)
Number |
Date |
Country |
Kind |
55-73795 |
Jun 1980 |
JPX |
|
55-77015 |
Jun 1980 |
JPX |
|
55-77016 |
Jun 1980 |
JPX |
|
55-77017 |
Jun 1980 |
JPX |
|
55-111040 |
Aug 1980 |
JPX |
|
55-111041 |
Aug 1980 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 268,115, filed May 28, 1981, now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3860398 |
Tsurumaru et al. |
Jan 1975 |
|
3978803 |
Asano et al. |
Sep 1976 |
|
4035248 |
Asano et al. |
Jul 1977 |
|
Foreign Referenced Citations (4)
Number |
Date |
Country |
865187 |
Jul 1978 |
BEX |
36-10064 |
Jul 1961 |
JPX |
36-15252 |
Sep 1961 |
JPX |
55-158295 |
Dec 1980 |
JPX |
Non-Patent Literature Citations (2)
Entry |
Lyman, T., Ed. Metals Handbook, vol. 2, 8th ed., Am. Soc. Metals, 1964. |
Silman, H. et al., Protective and Decorative Coatings for Metals, p. 556, 1978. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
268115 |
May 1981 |
|