Composite anti-sticking coating of Ni-Al framework, stainless steel material and coating tool

Abstract

The utility model discloses a composite anti-sticking coating with a Ni-Al framework, a stainless steel material and a coating tool. The composite anti-sticking coating comprises a steel material layer, a Ni-Al alloy skeleton layer and an anti-sticking polymer layer, the Ni-Al alloy framework layer is arranged on the upper surface of the steel material layer; the anti-sticking polymer layer is attached to the upper surface of the Ni-Al alloy skeleton layer; the Ni-Al alloy skeleton layer is provided with a porous structure; the porosity of the Ni-Al alloy framework layer ranges from 10% to 50%. The thickness of the Ni-Al alloy framework layer ranges from 100 micrometers to 500 micrometers. According to the scheme, the strength of the anti-sticking coating and the binding degree of the anti-sticking coating on steel can be improved, and therefore the problems that an organic anti-sticking polymer coating is low in strength and prone to abrasion and falling off are solved.

Description

Technical Field

[0001] The utility model relates to the field of composite coatings, in particular to a composite anti-sticking coating of a Ni-Al skeleton, a stainless steel material and a coating tool. Background Art

[0002] The coating roller is mainly used to transfer the coating liquid to the surface of the object to be coated, and the roller surface of the coating roller has high requirements for anti-sticking. Generally, fluorine-containing polymers (such as PTFE) and silicon-containing polymers (such as PDMS) are commonly used organic polymer anti-sticking coatings for existing coating rollers. They mainly utilize the advantages of low surface energy and stable chemical properties of the polymers to achieve the anti-sticking effect of the coating roller; at the same time, the anti-sticking coating is widely used in various working conditions, such as textile, fine chemical, petroleum and other industries.

[0003] Compared with inorganic materials, one of the biggest disadvantages of organic polymer anti-stick coatings is low strength. For example, filling Teflon polymer with other reinforcing materials (such as carbon nanotubes, silicon oxide, aluminum oxide particles, etc.) is the most commonly used means to improve strength, but because the particle reinforcement phase is only dispersed in the Teflon emulsion, it cannot form a continuous structure during the curing process, and it is difficult to fundamentally improve the strength of the coating. For another example, another method of preparing Ni-P coatings by electroplating is to add PTFE emulsion to the plating solution to achieve the deposition of PTFE particles in the Ni-P coating, but the PTFE particles in the composite coating prepared by this method are easily worn away, making it difficult to achieve long-term application. In this way, the existing organic anti-stick polymer coatings have the problems of low strength and easy wear and tear. Utility Model Content

[0004] The purpose of the utility model is to provide a composite anti-stick coating with a Ni-Al skeleton, which sets a Ni-Al alloy skeleton layer on the surface of a steel layer with a porosity of 10-50% and a thickness of 100-500 μm, thereby improving the strength of the anti-stick coating and the bonding degree to the steel.

[0005] The utility model also provides a stainless steel material, which is provided with the steel material layer of the composite anti-stick coating with a Ni-Al skeleton.

[0006] The utility model also provides a coating tool, which is made of stainless steel on the construction surface.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A composite anti-sticking coating with a Ni-Al skeleton, comprising: a steel layer, a Ni-Al alloy skeleton layer and an anti-sticking polymer layer;

[0009] The Ni-Al alloy skeleton layer is arranged on the upper surface of the steel layer; the anti-sticking polymer layer is attached to the upper surface of the Ni-Al alloy skeleton layer;

[0010] The Ni-Al alloy skeleton layer is provided with a porous structure; the porosity of the Ni-Al alloy skeleton layer is 10-50%; the thickness of the Ni-Al alloy skeleton layer is 100-500 μm.

[0011] Preferably, the anti-sticking polymer layer is a PTFE anti-sticking coating.

[0012] Preferably, the anti-sticking polymer layer is a PDMS anti-sticking coating.

[0013] Preferably, the thickness ratio between the Ni-Al alloy skeleton layer and the anti-sticking polymer layer is (2-4):1.

[0014] Preferably, the steel layer is a No. 45 steel layer, a Q235 steel layer or a 316L stainless steel layer.

[0015] A stainless steel material is provided with the steel layer of the composite anti-stick coating with a Ni-Al skeleton.

[0016] A coating tool has the above-mentioned stainless steel material provided on its construction surface.

[0017] Preferably, the coating tool is a coating roller.

[0018] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0019] The present invention provides a composite anti-stick coating with a Ni-Al skeleton, in which a Ni-Al alloy skeleton layer is arranged on the surface of a steel layer with a porosity of 10 to 50% and a thickness of 100 to 500 μm, thereby improving the strength of the anti-stick coating and the degree of bonding to the steel, thereby solving the problems of low strength and easy wear and fall-off of organic anti-stick polymer coatings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the composite anti-stick coating.

[0021] Figure 2 is the cross-sectional morphology of the coating of Example A2;

[0022] Figure 3 This is the cross-sectional morphology of the coating of Example A3.

[0023] in:

[0024] Steel material layer 1, Ni-Al alloy skeleton layer 2, anti-sticking polymer layer 3. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", "inner side", "outer side", "inner end", "outer end", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features, which are used to distinguish and describe the features, without distinction of order or importance. In the description of the present utility model, unless otherwise specified, "multiple" means more than two.

[0027] like Figure 1 , a composite anti-stick coating with a Ni-Al skeleton, comprising: a steel layer, a Ni-Al alloy skeleton layer and an anti-stick polymer layer;

[0028] The Ni-Al alloy skeleton layer is arranged on the upper surface of the steel layer; the anti-sticking polymer layer is attached to the upper surface of the Ni-Al alloy skeleton layer;

[0029] The Ni-Al alloy skeleton layer is provided with a porous structure; the porosity of the Ni-Al alloy skeleton layer is 10-50%; the thickness of the Ni-Al alloy skeleton layer is 100-500 μm.

[0030] The present invention provides a composite anti-stick coating with a Ni-Al skeleton, in which a Ni-Al alloy skeleton layer is arranged on the surface of a steel layer with a porosity of 10 to 50% and a thickness of 100 to 500 μm, thereby improving the strength of the anti-stick coating and the degree of bonding to the steel, thereby solving the problems of low strength and easy wear and fall-off of organic anti-stick polymer coatings.

[0031] Meanwhile, the porosity of the Ni-Al alloy skeleton layer in this solution is 10-50%, which is too low to provide enough space for loading the anti-sticking polymer layer. If the coating porosity is too high, the NiAl skeleton cannot be effectively combined, resulting in insufficient strength of the porous structure.

[0032] The Ni-Al alloy skeleton layer is mainly prepared from Ni powder and Al powder.

[0033] The anti-sticking polymer layer is formed by solidifying an organic polymer liquid with known anti-sticking properties. The anti-sticking polymer liquid is attached to the Ni-Al alloy skeleton layer. The Ni-Al alloy skeleton layer has a porous structure and can form a continuous membrane structure after solidification. It is not easy to fall off after wear.

[0034] Preferably, the anti-sticking polymer layer is a PTFE anti-sticking coating.

[0035] PTFE is polytetrafluoroethylene; PTFE has functions such as hydrophobicity, oleophobicity, anti-fouling and lubrication; the existing PTFE particles are deposited in the Ni-P coating by electroplating. The present application attaches the PTFE polymer emulsion to the NiAl alloy skeleton, which can improve the bonding degree of PTFE in the coating, and has a continuous structure, which is not easy to wear and is even less likely to fall off.

[0036] Preferably, the anti-sticking polymer layer is a PDMS anti-sticking coating.

[0037] PDMS is polydimethylsiloxane; in the present application, the PDMS solution is attached to the NiAl alloy skeleton, which can improve the bonding degree of PDMS in the coating, and has a continuous structure, which is not easy to wear and fall off.

[0038] Preferably, the thickness ratio between the Ni-Al alloy skeleton layer and the anti-sticking polymer layer is (2-4):1.

[0039] When the thickness ratio between the Ni-Al alloy skeleton layer and the anti-sticking polymer layer is (2-4):1, the stability of the Ni-Al alloy skeleton layer and the steel layer is the best, and the adhesion effect on the anti-sticking polymer layer is the best, thereby optimizing the bonding degree of the anti-sticking polymer layer to the steel layer.

[0040] Preferably, the steel layer is a No. 45 steel layer, a Q235 steel layer or a 316L stainless steel layer.

[0041] A stainless steel material, characterized in that the steel layer is provided with the composite anti-stick coating with the above-mentioned Ni-Al skeleton.

[0042] The stainless steel surface of the stainless steel material can be used as the steel layer of the composite anti-stick coating, so that the Ni-Al alloy skeleton layer and the anti-stick polymer layer can be directly applied on the surface of the stainless steel material to directly prepare the composite anti-stick coating.

[0043] A coating tool has the above-mentioned stainless steel material provided on its construction surface.

[0044] The coating tool will set a steel layer on the construction surface, that is, the construction surface is made of steel, and then a Ni-Al alloy skeleton layer is set on the steel layer, and the anti-stick polymer layer is attached to the Ni-Al alloy skeleton layer to form a composite anti-stick coating, which can give full play to the anti-stick function of the coating tool and prevent paint, glue and other adhesives from remaining on the coating tool.

[0045] Coating tools, such as coating rollers, coating spatulas, coating brushes, etc.

[0046] Preferably, the coating tool is a coating roller.

[0047] When the coating roller transfers the coating liquid to the surface of the object to be coated, it has high requirements for anti-sticking. The present scheme preferably prepares a Ni-Al alloy skeleton layer directly on the surface of the coating roller, so that the anti-sticking polymer liquid is attached through the Ni-Al alloy skeleton layer. The anti-sticking performance meets the anti-sticking needs of the coating roller and further meets the need that the anti-sticking coating is not easy to fall off during the coating process.

[0048] Performance Test:

[0049] Coating structure: Cut the coating cross-section sample, use phenolic hot mounting material to prepare the metallographic sample, and use a metallographic microscope to observe the coating. Figure 2 shown.

[0050] Anti-stick property: Heat PET to a molten state, take a steel material with a composite anti-stick coating, and attach PET to the steel material. If the PET falls off naturally after cooling, it is qualified.

[0051] Coating adhesion: The adhesion of steel with composite anti-stick coating is measured in accordance with "GB 1720-1979 Determination of paint film adhesion".

[0052] Example A: Carry out the following Examples A1-A3 respectively;

[0053] Embodiment A1:

[0054] (1) mixing Ni powder and Al powder, wherein the volume ratio of Ni powder to Al powder is 1:2; the particle size of Ni powder and Al powder is 60 μm, and the porosity of the Ni-Al alloy skeleton layer in step (2) is 20%;

[0055] (2) The mixed powder of step (1) is deposited on the surface of the steel layer by a cold spraying method to prepare a Ni-Al alloy skeleton layer with a thickness of 500 μm.

[0056] (3) The Ni-Al alloy skeleton layer was placed in an electric furnace at 550°C for 4 hours.

[0057] (4) Soaking the Ni-Al alloy skeleton layer of step (3) in a 5 mol / L NaOH solution for 12 h to obtain a porous coating structure; washing and drying the Ni-Al alloy skeleton layer.

[0058] Embodiment A2:

[0059] Based on Example A1, the following steps (5) are performed;

[0060] (5) spraying PTFE polymer emulsion into the porous coating structure of step (4) under 0.7 MPa compressed air, drying and curing the PTFE polymer emulsion at 350° C. to form an anti-sticking polymer layer, and obtaining a NiAl-PTFE composite anti-sticking coating.

[0061] The NiAl-PTFE composite anti-stick coating of step (5) was subjected to performance tests on coating structure, anti-stickiness and coating adhesion. In the test, the PTFE polymer emulsion was cured to form a PTFE anti-stick coating, which was attached to the porous structure of the NiAl alloy skeleton, such as Figure 2 ; According to the distribution of PTFE anti-stick coating in NiAl alloy skeleton, PTFE anti-stick coating has formed a membrane structure with continuous structure; This shows that the NiAl alloy skeleton of this scheme can form a membrane structure with continuous structure after the anti-stick polymer liquid is solidified, and the continuous combination of NiAl alloy skeleton and PTFE anti-stick coating can inevitably improve the strength of the composite anti-stick coating.

[0062] At the same time, the NiAl-PTFE composite anti-stick coating of the present scheme has excellent anti-stick performance. In the test results, the workpiece is covered with heated and molten PET; in the test results, the PET can be easily separated from the workpiece after cooling, thereby indicating the anti-stick effect of the NiAl-PTFE composite anti-stick coating.

[0063] In the test results, after the NiAl-PTFE composite anti-stick coating was treated with grids, each grid on the surface of the coating did not crack or fall off, indicating that the adhesion can reach level 0.

[0064] Embodiment A3:

[0065] Based on Example A1, the following steps (5) are performed;

[0066] (5) coating the PDMS solution on the porous coating structure of step (4), and drying and curing at 110° C. to form an anti-sticking polymer layer, thereby obtaining a NiAl-PDMS composite anti-sticking coating.

[0067] The NiAl-PDMS composite anti-stick coating of Example A3 was tested for coating structure and anti-stick performance. In the test results, the PDMS anti-stick coating was formed after the PDMS solution was cured, and it was attached to the porous structure of the NiAl alloy skeleton, such as Figure 3 ; According to the distribution of PDMS anti-stick coating in NiAl alloy skeleton, PDMS anti-stick coating has formed a membrane structure with continuous structure; This shows that the NiAl alloy skeleton of this scheme can form a membrane structure with continuous structure after the anti-stick polymer liquid is solidified, and the continuous combination of NiAl alloy skeleton and PDMS anti-stick coating can inevitably improve the strength of the composite anti-stick coating.

[0068] At the same time, in the test results, the workpiece with NiAl-PDMS composite anti-stick coating adheres to the heated and molten PET; in the test results, PET is easily separated from the workpiece after cooling, which shows the anti-stick effect of NiAl-PDMS composite anti-stick coating. In the test results, after the NiAl-PDMS composite anti-stick coating is processed with grids, each grid on the surface of the layer does not break or fall off, indicating that the adhesion can reach level 0.

[0069] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A composite anti-stick coating with a Ni-Al skeleton, characterized in that: include: Steel layer, Ni-Al alloy skeleton layer and anti-sticking polymer layer; The Ni-Al alloy skeleton layer is arranged on the upper surface of the steel layer; the anti-sticking polymer layer is attached to the upper surface of the Ni-Al alloy skeleton layer; The Ni-Al alloy skeleton layer is provided with a porous structure; the porosity of the Ni-Al alloy skeleton layer is 10-50%; the thickness of the Ni-Al alloy skeleton layer is 100-500 μm.

2. The composite anti-stick coating of a Ni-Al skeleton according to claim 1, characterized in that: The anti-sticking polymer layer is a PTFE anti-sticking coating.

3. The composite anti-stick coating of a Ni-Al skeleton according to claim 1, characterized in that: The anti-sticking polymer layer is a PDMS anti-sticking coating.

4. A composite anti-stick coating with a Ni-Al skeleton according to any one of claims 1 to 3, characterized in that: The thickness ratio between the Ni-Al alloy skeleton layer and the anti-sticking polymer layer is (2-4):

1.

5. The composite anti-stick coating of a Ni-Al skeleton according to claim 1, characterized in that: The steel layer is a No. 45 steel layer, a Q235 steel layer or a 316L stainless steel layer.

6. A stainless steel material, characterized in that: The steel layer is provided with a composite anti-stick coating with a Ni-Al skeleton as described in any one of claims 1-5.

7. A coating tool, characterized in that: A stainless steel material as claimed in claim 6 is provided on the construction surface.

8. A coating tool according to claim 7, characterized in that: The coating tool is a coating roller.

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