CONTAINER APPLIED WITH FLUORIDE-FREE SURFACE COATING AND PREPARATION METHOD THEREOF

Abstract

A container applied with a fluoride-free surface coating and a preparation method thereof are provided. The preparation method comprises the steps of: providing a container structure substrate and a cladding material, wherein the cladding material is a boron nitride powder material having a chemical composition comprising 43 wt % of boron, 0.1 wt % of boron oxide, 0.03 wt % of carbon, and 0.15 wt % of water, and having a purity of 99.5%, a finess of 30 m, and a density of 0.4 g/cm.sup.3; and then cladding the boron nitride powder material onto an inner surface of a body by using a cladding technology, to form a cladded layer. The container applied with a fluoride-free surface coating has a structure comprising: a body having an inner surface; and a cladded layer, formed on the inner surface by processing the boron nitride powder material by a cladding technology.

Claims

1. A container applied with a fluoride-free surface coating, having a structure comprising: a body, having an inner surface for holding food materials; and a cladded layer, formed on the inner surface by processing a boron nitride powder material having a chemical composition comprising 43 wt % of boron (B), 0.1 wt % of boron oxide (B.sub.2O.sub.3), 0.03 wt % of carbon, and 0.15 wt % of water (H.sub.2O), and having a purity of 99.5%, a finess of 30 m, and a density of 0.4 g/cm.sup.3 by a cladding technology.

2. The container applied with a fluoride-free surface coating according to claim 1, wherein the body is made with a metal or a ceramic material.

3. A method for preparing a fluoride-free surface coating of a container, comprising the steps of: providing a body of a container structure substrate and a cladding material, wherein the cladding material is a boron nitride powder material having a chemical composition comprising 43 wt % of boron (B), 0.1 wt % of boron oxide (B.sub.2O.sub.3), 0.03 wt % of carbon, and 0.15 wt % of water (H.sub.2O), and having a purity of 99.5%, a finess of 30 m, and a density of 0.4 g/cm.sup.3; and cladding the boron nitride powder material onto an inner surface of the body for holding food materials by using a cladding technology, to form a cladded layer.

4. The method for preparing a fluoride-free surface coating according to claim 3, wherein the processing by a cladding technology is selected from the group consisting of hot spraying, chemical plating, physical plating, and laser cladding, and a cladded layer of composite ceramic structure is formed on the inner surface with implanted pore structures of the body by cladding.

5. The method for preparing a fluoride-free surface coating according to claim 3, wherein the body of the container structure substrate is made with a metal or a ceramic material, and the to-be-cladded inner surface for holding food materials has a processing precision of not less than IT7.

6. The method for preparing a fluoride-free surface coating according to claim 3, wherein the cladding technology is laser cladding, in which the powder feeding mode is synchronous powder feeding or fore-put powder feeding, the powder feeding gas is an inert gas, and the parameters for the laser cladding technology comprise: laser power 1000-3500 W, sweep speed 3-12 mm/S, and powder feeding rate 6-20 g/min.

7. The method for preparing a fluoride-free surface coating according to claim 3, wherein the cladding material is a hard alloy ceramic material, or a powdered hard alloy ceramic material having an average particle size of 60 to 160 m.

8. The method for preparing a fluoride-free surface coating according to claim 3, wherein before the cladding step, the inner surface of the body is processed by sandblasting, rolling, or embossing, to form well-distributed implanted pore structures.

9. The method for preparing a fluoride-free surface coating according to claim 6, wherein the laser cladding technology is selected from the group consisting of single-track forming, multi-track overlapping, multi-layer track stacking and closed curved track docking.

10. The method for preparing a fluoride-free surface coating according to claim 3, wherein the body of the container structure substrate is joined to the cladding material by metallurgical bonding.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1 is a schematic cross-sectional diagram showing the structure of a container with a fluoride-free surface coating according to the present invention;

[0017] FIG. 2 is a flow chart of a method for preparing a fluoride-free surface coating of a container according to the present invention;

[0018] FIG. 3 is a schematic diagram showing a cladding technology of the present invention that is laser cladding with coaxial powder feeding; and

[0019] FIG. 4 is a schematic diagram showing a cladding technology of the present invention that is laser cladding with lateral powder feeding.

DETAILED DESCRIPTION

[0020] Referring to FIG. 1, a container applied with a fluoride-free surface coating provided in this embodiment has a structure comprising a body 10 having an inner surface 11 for holding food materials, in which the body 10 may be made with a metal or a ceramic material; and a cladded layer 30 formed on the inner surface 11 by processing a boron nitride powder material having a chemical composition comprising 43 wt % of boron (B), 0.1 wt % of boron oxide (B.sub.2O.sub.3), 0.03 wt % of carbon, and 0.15 wt % of water (H.sub.2O), and having a purity of 99.5%, a finess of 30 m, and a density of 0.4 g/cm.sup.3 by a cladding technology.

[0021] Referring to FIGS. 2 to 4, a method for preparing a fluoride-free surface coating of a container provided in this embodiment comprises:

[0022] Step S10: providing a body 10 of a container structure substrate and a cladding material, in which the cladding material is a boron nitride powder material 20 having a chemical composition comprising 43 wt % of boron (B), 0.1 wt % of boron oxide (B.sub.2O.sub.3), 0.03 wt % of carbon, and 0.15 wt % of water (H.sub.2O), and having a purity of 99.5%, a finess of 30 m, and a density of 0.4 g/cm.sup.3; and

[0023] Step S20: cladding the boron nitride powder material 20 onto an inner surface 11 of the body 10 of the container structure substrate by using a cladding technology, to form a cladded layer 30.

[0024] A method for preparing a fluoride-free surface coating of a container comprises: Step S10: providing a body 10 of a container structure substrate and a cladding material, in which the cladding material is a boron nitride powder material 20 having a chemical composition comprising 43 wt % of boron (B), 0.1 wt % of boron oxide (B.sub.2O.sub.3), 0.03 wt % of carbon, and 0.15 wt % of water (H.sub.2O), and having a purity of 99.5%, a finess of 30 m, and a density of 0.4 g/cm.sup.3; and Step S20: cladding the boron nitride powder material 20 onto an inner surface 11 of the body 10 of the container structure substrate by using a cladding technology, to form a cladded layer 30.

[0025] In an embodiment, the processing by a cladding technology is selected from the group consisting of hot spraying, chemical plating, physical plating, and laser cladding, and a cladded layer of composite ceramic structure is formed on the inner surface with implanted pore structures of the body by cladding.

[0026] In an embodiment, the body of the container structure substrate is made with a metal or a ceramic material, and the to-be-cladded surface has a processing precision of not less than IT7.

[0027] In an embodiment, the cladding technology is laser cladding, in which the powder feeding mode is synchronous powder feeding or fore-put powder feeding (where in the synchronous powder feeding mode, the powder is directly fed to a moving melt pool formed by laser radiation, and the coating is formed at a time; and in the fore-put powder feeding mode, the powder is laid previously in a region through which a traveling path of a laser head runs, and then irradiated by a laser beam), the powder feeding gas is an inert gas, and the parameters for the laser cladding technology comprise: laser power 1000-3500 W, sweep speed 3-12 mm/S, and powder feeding rate 6-20 g/min. The laser cladding technology is selected from the group consisting of single-track forming, multi-track overlapping, multi-layer track stacking and closed curved track docking.

[0028] FIG. 3 is a schematic diagram showing a cladding technology used in the above embodiment that is laser cladding with coaxial powder feeding, where the coaxial powder feeding is a synchronous powder feeding mode. In FIG. 3, a laser head C moves towards a travelling direction D, and a laser beam A travels through the laser head C filled with a protective gas B and the boron nitride powder material 20, and is then irradiated onto a surface of the body 10 after passing through the laser head C, whereby the boron nitride powder material 20 is cladded onto the surface of the body 10, to form a cladded layer 30. FIG. 4 is a schematic diagram showing a cladding technology of the present invention that is laser cladding with fore-put powder feeding. In FIG. 4, a laser head C moves towards a travelling direction D, the boron nitride powder material 20 is laid previously in a processing region on the surface of the body 10 irradiated by a laser beam A, and then the laser beam A travels through the laser head C filled with a protective gas B, and is irradiated onto the processing region on the surface of the body 10, such that the boron nitride powder material 20 is cladded to form a cladded layer 30.

[0029] In an embodiment, the cladding material is a hard alloy ceramic material or a powdered hard alloy ceramic material having an average particle size of 60-160 m.

[0030] In an embodiment, wherein before the cladding step, the inner surface of the body is processed by sandblasting, rolling, or embossing, to form well-distributed implanted pore structures.