阅读说明：本技术 一种防氢蚀的高分子混合涂层及其制备方法 (Hydrogen-corrosion-resistant polymer mixed coating and preparation method thereof ) 是由 邢子义 王升科 邢晓明 瓦列里·巴夫洛维奇·梅沙尔金 切尔诺科夫·维塔利·维亚切斯拉沃维奇 于 2021-08-25 设计创作，主要内容包括：一种防氢蚀的高分子混合涂层及其制备方法,包括如下质量份数的原料制备而成：聚四氟乙烯：60-80份；聚醚醚酮：4-8份；无水丙酮：30-40份；丙烯酸树脂：4-8份；乳化剂：2-4份；羰基金属：1.5-4.5。本申请采用羰基金属混合高分子有机物的方式,使得在进行涂覆时,基本在接触到金属之前已然完成分解,然后涂覆到转子表面,混合涂层与转子的结合效果更好,在保证密封性能的同时,耐磨性能也大大提高。(The hydrogen corrosion resistant polymer mixed coating and the preparation method thereof comprise the following raw materials in parts by weight: polytetrafluoroethylene: 60-80 parts; polyether ether ketone: 4-8 parts; anhydrous acetone: 30-40 parts; acrylic resin: 4-8 parts; emulsifier: 2-4 parts; metal carbonyl: 1.5-4.5. This application adopts the mode of carbonyl metal mixed polymer organic matter for when coating, basically accomplish the decomposition before contacting the metal, then coat to the rotor surface, the combination effect of mixed coating and rotor is better, when guaranteeing sealing performance, wear resistance also improves greatly.)

1. A hydrogen corrosion resistant polymer mixed coating is characterized in that: the composite material is prepared from the following raw materials in parts by mass: polytetrafluoroethylene: 60-80 parts; polyether ether ketone: 4-8 parts; anhydrous acetone: 30-40 parts; acrylic resin: 4-8 parts; emulsifier: 2-4 parts; metal carbonyl: 1.5-4.5.

2. The hydrogen etch resistant polymer hybrid coating of claim 1, wherein: the thickness of the polymer mixed coating is 30-50 μm.

3. The hydrogen etch resistant polymer hybrid coating of claim 1, wherein: the emulsifier is sodium dodecyl sulfate.

4. The hydrogen etch resistant polymer hybrid coating of claim 1, wherein: the metal carbonyl comprises nickel carbonyl and cobalt carbonyl, and the mass ratio of the nickel carbonyl to the cobalt carbonyl is 1: 2-4.

5. A method for preparing the hydrogen etching resistant polymer hybrid coating according to claim 1, wherein: the method comprises the following steps:

s1, placing polyether-ether-ketone, anhydrous acetone, acrylic resin, an emulsifier and carbonyl metal in a high-speed mixer under the condition of isolating air for primary mixing to finish primary mixing;

s2, placing polytetrafluoroethylene in the mixture obtained in the S1, performing ultrasonic vibration, and then placing the mixture in a high-speed mixer for secondary mixing to obtain a spraying raw material;

and S3, spraying the spraying raw materials to obtain the polymer mixed coating.

6. The method for preparing a polymer hybrid coating for hydrogen etching resistance according to claim 5, wherein: the operation time of the primary mixing is 10-15 h.

7. The method for preparing a polymer hybrid coating for hydrogen etching resistance according to claim 5, wherein: the operation time of the ultrasonic vibration is 1-2 h.

8. The method for preparing a polymer hybrid coating for hydrogen etching resistance according to claim 5, wherein: the operation time of the secondary mixing is 6-8 h.

9. The method for preparing a polymer hybrid coating for hydrogen etching resistance according to claim 5, wherein: the spraying adopts electrostatic spraying.

10. The method for preparing a polymer hybrid coating for hydrogen etching prevention according to claim 9, wherein: firstly, sand blasting, cleaning and oil removing are carried out on the surface of the rotor, and then electrostatic spraying and heating curing are carried out to obtain the polymer mixed coating.

Technical Field

The application relates to a hydrogen corrosion resistant polymer mixed coating and a preparation method thereof.

Background

For positive displacement blowers, it relies on the pressure change caused by the volume change between the rotors during rotation of the rotors to provide a pressurized transfer of the delivered gas, in which there is a high degree of sealing between the rotors that is produced by pure sealing compression. In the process of hydrogen transmission, hydrogen corrosion may be generated between hydrogen and metal, and the hydrogen corrosion can greatly reduce the strength of a rotor to cause damage of the rotor, so that some improvement schemes are provided at present, and a high-molecular mixed coating is arranged on the rotor. However, the durability and stability of the coating is problematic due to the high speed operation of the rotors and the characteristic of mutual compression.

Disclosure of Invention

In order to solve the above problems, the present application provides a hydrogen corrosion resistant polymer hybrid coating, which is prepared from the following raw materials in parts by mass: polytetrafluoroethylene: 60-80 parts; polyether ether ketone: 4-8 parts; anhydrous acetone: 30-40 parts; acrylic resin: 4-8 parts; emulsifier: 2-4 parts; metal carbonyl: 1.5-4.5. This application adopts the mode of carbonyl metal mixed polymer organic matter for when coating, basically accomplish the decomposition before contacting the metal, then coat to the rotor surface, the combination effect of mixed coating and rotor is better, when guaranteeing sealing performance, wear resistance also improves greatly.

Preferably, the thickness of the polymer mixed coating is 30-50 μm. The coating thickness of the coating is generally controlled according to the spraying amount and the spraying times, and of course, the coating can be sprayed to a higher thickness for multiple times, then sprayed to a certain thickness, such as more than 100 micrometers, and then polished to the required thickness.

Preferably, the emulsifier is sodium dodecyl sulfate.

Preferably, the metal carbonyl comprises nickel carbonyl and cobalt carbonyl, and the mass ratio of the nickel carbonyl to the cobalt carbonyl is 1: 2-4.

On the other hand, the preparation method of the hydrogen corrosion resistant polymer mixed coating is also disclosed, and comprises the following steps:

s1, placing polyether-ether-ketone, anhydrous acetone, acrylic resin, an emulsifier and carbonyl metal in a high-speed mixer under the condition of isolating air for primary mixing to finish primary mixing;

s2, placing polytetrafluoroethylene in the mixture obtained in the S1, performing ultrasonic vibration, and then placing the mixture in a high-speed mixer for secondary mixing to obtain a spraying raw material;

and S3, spraying the spraying raw materials to obtain the polymer mixed coating. This application adopts earlier to carry out intensive mixing with other substrates, then mixes polytetrafluoroethylene wherein mode, can provide the many substrates of a relative volume basically earlier to be favorable to dispersing polytetrafluoroethylene, can make main functional component polytetrafluoroethylene dispersibility better.

Preferably, the operation time of the primary mixing is 10-15 h.

Preferably, the operation time of the ultrasonic vibration is 1-2 h.

Preferably, the operation time of the secondary mixing is 6-8 h.

Preferably, the spraying is electrostatic spraying.

Preferably, the macromolecule mixed coating is obtained by sand blasting, cleaning, oil removing, electrostatic spraying and heating curing on the surface of the rotor.

This application can bring following beneficial effect:

1. according to the method, the carbonyl metal is mixed with the macromolecular organic matter, so that decomposition is basically completed before the carbonyl metal contacts with the metal during coating, and then the carbonyl metal is coated on the surface of the rotor, the combined effect of the mixed coating and the rotor is better, and the wear resistance is greatly improved while the sealing performance is ensured;

2. the coating thickness of the coating is generally controlled according to the spraying amount and the spraying times, and of course, the coating can also be sprayed for a plurality of times to a higher thickness, then sprayed to a certain thickness, such as more than 100 micrometers, and then polished to the thickness meeting the requirements;

3. this application adopts earlier to carry out intensive mixing with other substrates, then mixes polytetrafluoroethylene wherein mode, can provide the many substrates of a relative volume basically earlier to be favorable to dispersing polytetrafluoroethylene, can make main functional component polytetrafluoroethylene dispersibility better.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present application will be explained in detail through the following embodiments.

The present application illustrates a specific embodiment of the application by way of examples of synthesis and characterization as follows:

a preparation method of a hydrogen corrosion resistant polymer mixed coating comprises the following steps:

s1, placing polyether-ether-ketone, anhydrous acetone, acrylic resin, an emulsifier and carbonyl metal in a high-speed mixer under the condition of air isolation for primary mixing, wherein the operation time of the primary mixing is 10-15h, and finishing primary mixing; the emulsifier is sodium dodecyl sulfate; the composition of the material is shown in table 1, and the operating parameters are shown in table 2;

table 1:

s2, placing polytetrafluoroethylene into the mixture obtained in the S1, performing ultrasonic vibration for 1-2h, and then placing the mixture into a high-speed mixer for secondary mixing for 6-8h to obtain a spraying raw material;

table 2:

s3, spraying the cleaned rotor surface with the spraying raw materials to obtain a polymer mixed coating; the spraying adopts electrostatic spraying. Firstly, sand blasting, cleaning and oil removing are carried out on the surface of the rotor, and then electrostatic spraying and heating curing are carried out to obtain the polymer mixed coating. The thickness of the polymer mixed coating is 30-50 μm.

S4, carrying out the following parameter characterization on the mixed coating: thickness, coefficient of friction, wear rate and impact resistance (GB/T1732 + 1993) as shown in Table 3.

Table 3:

serial number	Coefficient of friction	Wear rate (10)-8mm3/Nm)	Impact resistance
				1	0.05	0.12	Without cracks
2	0.11	0.38	Without cracks
				3	0.17	0.27	Without cracks
4	0.37	1.15	Without cracks
				5	0.42	1.74	Without cracks
6	0.18	0.35	Fine cracks
				7	0.21	0.51	Fine cracks
8	0.22	0.39	Fine cracks

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.