TH55840B - Tin-coated steel plate for good corrosion resistance - Google Patents

Abstract

DC60 is a surface-treated steel plate with corrosion-resistant properties, ideally suited for use as an uncoated can for packaging beverages or acidic foods. This surface-treated steel plate consists of the following components: an alloy layer (1) on top of the steel plate (4), which forms the inner wall of the can (after forming), in which alloy layer (1) is composed of the following percentages by mass: Sn 50-75%, Fe 20-40%, and Ni 7-20%; an alloy layer (2) on top of alloy layer (1), in which alloy layer (2) is composed of the following percentages by mass: Sn 70-80%, Fe 15-25%, and Ni 0.1-7%; and a non-alloyed Sn coating layer (3), whose coating weight is 1.5-15.0 g/m², constructed in the specified order. Where the total amount of Sn per unit area in alloy layers (1) and (2) is 0.2–2.0 g/m² and the total amount of Ni per unit area in alloy layers (1) and (2) is 0.001–0.3 g/m², the surface-treated steel sheet is made of steel that has been given corrosion-resistant properties for use as an uncoated can for holding acidic beverages or foods. The surface-treated steel sheet consists of the following: an alloy layer (1) on the surface of the steel sheet (4) which will be the inner wall of the can. (After being formed into a can) where the alloy layer (1) will consist of the following percentages by mass: Sn 50-75%, Fe 20-40% and Ni 7-20%, alloy layer (2) is placed on top of alloy layer (1) where alloy layer (2) will consist of the following percentages by mass: Sn 70-80%, Fe 15-25% and Ni 0.1-7%, and a non-alloyed Sn coating layer (3) where its coating weight is 1.5-15.0 g/m², formed in the order of the given name, where the total amount of Sn per unit area in alloy layers (1) and (2) is 0.2-2.0 g/m² and the total amount of Ni per unit area in alloy layers (1) and (2) is 0.001-0.3 g/m².

Claims (7)

1.Tinplate with good corrosion resistance properties. Where the alloy layer (1) is on the surface of the steel plate (4), where the alloy layer (1) is composed of the following in%, with the masses Sn 50-75%, Fe 20-40% and Ni 7. -20%, the alloy layer (2) is on the alloy layer (1), where the alloy layer (2) consists of the following parts in%, with the masses Sn 70-80%, Fe 15-25% and Ni 0.1-. 7% and the non-alloy Sn coating (3) where its coating weight of 1.5-15.0 g / m 2 is formed in the order as the name suggests. Where the total volume of Sn per unit area in the alloy layers (1) and (2) is 0.2-2.0 g / m 2 and the total amount Ni per unit area in the alloy layers (1) and (2) is 0.001. -0.3 g / m 2 2. Tinplate as described in Clause 1, which consists of the following, with a layer It is obtained by a chemical treatment (5) to prevent oxidation occurring on the non-alloyed Sn layer (3). 3.Cans that can contain acid foods or beverages. Where The inner cavity is used to store acid food or beverages. Where the walls of the cans will be assembled Rising out of the tinplate stacked in layers Where different layers The walls are arranged from The inner layer closest to the inner cavity And then continue They are separated from the outside in the following order: sheet steel layer (4), alloy layer (1) composed of the following parts%, with mass Sn 50-75%, Fe 20-40% and Ni 7. -20% and the alloy layer (2) is on the alloy layer (1), where the alloy layer (2) is made up of the following%, the mass is Sn 70-80%, Fe 15-25% and Ni 0.1-7%. And the non-alloy Sn layer (3) where its coating weight of 1.5-15.0 g / m 2 is formed in the order as the name suggests. Where the total volume of Sn per unit area in the alloy layers (1) and (2) is 0.2-2.0 g / m 2 and the total amount Ni per unit area in the alloy layers (1) and (2) is 0.001. -0.3 g / m 2 4. Cans as described in Clause 3 where the steel plate layer (4) will be the wall layer. The innermost side of the can can affect the acidic food or drink stored in the Cans directly 5.Cans, as described in claim 3, which further comprise the chemically treated layer (5) to prevent oxidation occurring on the non-alloyed Sn layer (3 ) 6. Tinplate as described in Clause 1, where the non-alloy Sn class (3) will have a coating weight of 3.9-14.0 g / m 2. 7. Cans, as stated in claim 3, where the non-alloy Sn (3) class will have a coating weight of 3.9-14.0 g / m 2.