阅读说明：本技术 一种提升合页防腐性能的方法 (Method for improving corrosion resistance of hinge ) 是由 蔡训儒 张影 刘鹏 于 2021-07-23 设计创作，主要内容包括：本发明公开了一种提升合页防腐性能的方法,涉及耐腐蚀处理技术领域。本发明方法包括对成型后的合页毛坯件,进行电镀铬处理,将封闭剂溶液施加在镀铬合页表面,将上述镀铬合页放入180℃热烘道,烘烤3-5mi n；封闭剂溶液以重量百分比计包括：丙烯酸丁酯10-15％、B-环装糊精3-5％、丙二醇甲醚醋酸酯10-15％、棕榈酸异丙醇10-15％、N-甲基-N-烯丙基全氟丁基磺酰胺15-20％、三乙氧基硅烷15-20％、聚乙二醇单甲醚甲基丙烯酸酯0.5-1.5％、过硫酸钾0.5-1.5％、以及水余量。本发明通过在镀铬合页表面以喷涂的方式喷涂封闭剂溶液,在不改变镀铬合页本色的前提下,显著提升镀铬合页耐腐蚀性能。(The invention discloses a method for improving the corrosion resistance of a hinge, and relates to the technical field of corrosion resistance treatment. The method comprises the steps of performing electrochromism treatment on a molded hinge blank, applying a sealant solution to the surface of a chromium-plated hinge, putting the chromium-plated hinge into a 180 ℃ hot drying tunnel, and baking for 3-5 min; the sealant solution comprises the following components in percentage by weight: 10-15% of butyl acrylate, 3-5% of B-cyclodextrin, 10-15% of propylene glycol methyl ether acetate, 10-15% of isopropyl palmitate, 15-20% of N-methyl-N-allyl perfluorobutyl sulfonamide, 15-20% of triethoxysilane, 0.5-1.5% of polyethylene glycol monomethyl ether methacrylate, 0.5-1.5% of potassium persulfate and the balance of water. According to the invention, the sealant solution is sprayed on the surface of the chromium-plated hinge in a spraying manner, so that the corrosion resistance of the chromium-plated hinge is obviously improved on the premise of not changing the natural color of the chromium-plated hinge.)

1. A method for improving the corrosion resistance of a hinge is characterized by comprising the following steps:

stp1, performing chromium electroplating treatment on the molded hinge blank;

stp2, applying a sealant solution on the surface of the chromium-plated hinge;

stp3, placing the chromium-plated hinge into a 180 ℃ hot drying tunnel, and baking for 3-5 min.

2. The method for improving the corrosion resistance of the hinge according to claim 1, wherein the hinge blank is formed by blanking, punching, bending and riveting a cold-rolled steel plate.

3. The method for improving the corrosion resistance of the hinge according to claim 1, wherein the sealant solution comprises the following components in percentage by weight: 10-15% of butyl acrylate, 3-5% of B-cyclodextrin, 10-15% of propylene glycol methyl ether acetate, 10-15% of isopropyl palmitate, 15-20% of N-methyl-N-allyl perfluorobutyl sulfonamide, 15-20% of triethoxysilane, 0.5-1.5% of polyethylene glycol monomethyl ether methacrylate, 0.5-1.5% of potassium persulfate and the balance of water.

4. The method for improving the corrosion resistance of the hinge as claimed in any one of claims 1 to 3, wherein the sealant solution comprises the following components in percentage by weight: 12-13% of butyl acrylate, 3.85-4.05% of B-cyclodextrin, 12.5-13% of propylene glycol methyl ether acetate, 12.5-13% of isopropyl palmitate, 17-18% of N-methyl-N-allyl perfluorobutyl sulfonamide, 17-18% of triethoxysilane, 1-1.1% of polyethylene glycol monomethyl ether methacrylate, 1-1.1% of potassium persulfate and the balance of water.

5. The method for improving the corrosion resistance of the hinge as recited in any one of claims 1 to 3, wherein the sealant solution is sprayed on the surface of the chromium-plated hinge in a spray manner in the Stp 2.

6. The method for improving the corrosion resistance of the hinge according to any one of claims 1 to 3, wherein the Stp1 is subjected to a pre-treatment of oil and rust removal and then an electro-chromic treatment.

Technical Field

The invention belongs to the technical field of corrosion resistance treatment, and particularly relates to a method for improving the corrosion resistance of a hinge.

Background

The hinge is used as an outer decoration of the refrigerator, and has higher requirements on appearance color and corrosion resistance in the using process. In the industry, the surface treatment of the hinge is mainly carried out by electrogalvanizing and electrochromizing. The electrogalvanizing has better corrosion resistance, but the color is not prominent, and the product grade is lowered. The electroplated chromium has high color and high grade, but has poor corrosion resistance. How to improve the corrosion resistance and performance consistency of the chromium-plated hinge at lower cost on the premise of ensuring that the color of the chromium-plated hinge is not changed is still a great problem in the industry.

Disclosure of Invention

The invention aims to provide a method for improving the corrosion resistance of a hinge, which solves the problem of the corrosion resistance of the existing chromium-plated hinge by spraying a sealant solution on the surface of the chromium-plated hinge in a spraying manner.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a method for improving the corrosion resistance of a hinge, which comprises the following steps:

stp1, performing chromium electroplating treatment on the molded hinge blank;

stp2, applying a sealant solution on the surface of the chromium-plated hinge;

stp3, placing the chromium-plated hinge into a 180 ℃ hot drying tunnel, and baking for 3-5 min.

The hinge blank is formed by blanking, punching, bending and riveting a cold-rolled steel plate.

Further, the sealant solution comprises, in weight percent: 10-15% of butyl acrylate, 3-5% of B-cyclodextrin, 10-15% of propylene glycol methyl ether acetate, 10-15% of isopropyl palmitate, 15-20% of N-methyl-N-allyl perfluorobutyl sulfonamide, 15-20% of triethoxysilane, 0.5-1.5% of polyethylene glycol monomethyl ether methacrylate, 0.5-1.5% of potassium persulfate and the balance of water.

Further, the sealant solution comprises, in weight percent: 12-13% of butyl acrylate, 3.85-4.05% of B-cyclodextrin, 12.5-13% of propylene glycol methyl ether acetate, 12.5-13% of isopropyl palmitate, 17-18% of N-methyl-N-allyl perfluorobutyl sulfonamide, 17-18% of triethoxysilane, 1-1.1% of polyethylene glycol monomethyl ether methacrylate, 1-1.1% of potassium persulfate and the balance of water.

Further, in the Stp2, the sealant solution is sprayed on the surface of the chromium-plated hinge in a spraying mode.

Further, in the Stp1, a pretreatment for removing oil and rust is first performed, and then an electrolytic chromium plating treatment is performed.

The invention has the following beneficial effects:

according to the invention, the sealant solution is sprayed on the surface of the chromium-plated hinge in a spraying manner, so that the corrosion resistance of the chromium-plated hinge is obviously improved on the premise of not changing the natural color of the chromium-plated hinge.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Detailed Description

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

Examples 1,

A method for improving the corrosion resistance of a hinge comprises the following steps:

stp1, blanking, punching, bending and riveting a cold-rolled steel plate to form a hinge blank, performing oil and rust removal pretreatment on the formed hinge blank, and performing chromium electroplating treatment;

stp2, spraying the sealant solution on the surface of the chromium-plated hinge in a spraying manner;

stp3, placing the chromium-plated hinge into a 180 ℃ hot drying tunnel, and baking for 3-5 min.

Example 2

Based on example 1;

the sealant solution comprises the following components in percentage by weight: 10% of butyl acrylate, 5% of B-cyclodextrin, 10% of propylene glycol methyl ether acetate, 10% of isopropyl palmitate, 15% of N-methyl-N-allyl perfluorobutyl sulfonamide, 15% of triethoxysilane, 1.5% of polyethylene glycol monomethyl ether methacrylate, 0.5% of potassium persulfate and the balance of water.

Example 3

Based on example 1;

the sealant solution comprises the following components in percentage by weight: butyl acrylate 13%, B-cyclodextrin 4%, propylene glycol methyl ether acetate 12.5%, isopropyl palmitate 12.5%, N-methyl-N-allyl perfluorobutyl sulfonamide 17%, triethoxysilane 18%, polyethylene glycol monomethyl ether methacrylate 1.1%, potassium persulfate 1%, and the balance water.

Example 4

Based on example 1;

the sealant solution comprises the following components in percentage by weight: 15% of butyl acrylate, 3-5% of B-cyclodextrin, 15% of propylene glycol methyl ether acetate, 10% of isopropyl palmitate, 20% of N-methyl-N-allyl perfluorobutyl sulfonamide, 15% of triethoxysilane, 1% of polyethylene glycol monomethyl ether methacrylate, 1.5% of potassium persulfate and the balance of water.

Preparing a sealant solution according to the above examples 2-4, and taking the chromium-plated hinge A with the plating thickness of 2 μm as a group 1A, a group 1B, a group 1C and a group 1D; and the chromium plating hinges B with the surface plating layer thickness of 8 mu m are divided into a group 2A, a group 2B, a group 2C and a group 2D;

treating the group 1A, the group 1B and the group 1C with the sealant solutions prepared in the examples 2-4 respectively, and treating the group 2A, the group 2B and the group 2C with the sealant solutions prepared in the examples 2-4 respectively; wherein group 1D and group 2D did not undergo any treatment;

the above was subjected to neutral salt spray test and 10 ten thousand door opening and closing tests, and counted as follows:

item

Group 1A

Group 1B

Group 1C

Group 1D

Group 2A

Group 2B

Group 2C

Group 2D

Neutral salt spray test (h)

240

240

240

72

264

264

264

96

10 ten thousand door opening and closing tests

LV1

LV1

LV1

LV3

LV1

LV1

LV1

LV2

Wherein, the results of 10 ten thousand door opening and closing tests LV1, LV2 and LV3 respectively represent:

LV1 had no scratch, coating was peeled off;

LV2 minor scratch

LV3 large scratches with small coating flaking off.

The neutral salt spray tests were carried out and the results of the tests showed that the products treated in examples 2-4 all had a time of more than 240 hours, whereas the chrome-plated hinge time without any treatment was only 96 hours.

The door opening and closing test is carried out for 10 ten thousand times; experimental results the products treated in examples 2-4 have no quality defects such as scratches, coating falling off and the like on the surface; and the surface of the chromium-plated hinge which is not treated is scratched.

The butyl acrylate, the B-cyclodextrin, the propylene glycol methyl ether acetate and the palmitic acid isopropanol improve the surface bonding force of the sealant and the chromium-plated hinge; the N-methyl-N-allyl perfluorobutyl sulfonamide and the triethoxysilane improve the hydrophobic and oleophobic capabilities of the sealant and the wear resistance of the sealant. The components interact with each other, so that the corrosion resistance of the hinge is improved, and the friction resistance of the hinge is improved.

Meanwhile, the sealant is cured into a transparent film after being baked at high temperature, the natural color of the chromium-plated hinge is not changed, and the sealant is independently constructed through a spraying process, so that the original chromium-plated process is not influenced.

The sealant is cured on the surface of the chromium-plated hinge to form a film, and the film is acid-resistant, alkali-resistant and stain-resistant, so that the corrosion resistance of the chromium-plated hinge can be greatly improved. The sealant has good corrosion resistance, can effectively reduce the thickness of the chromium plating layer, further improves the chromium plating efficiency and reduces the environmental pollution caused by chromium plating.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.