CN112300663A

CN112300663A - Sealant with corrosion resistance

Info

Publication number: CN112300663A
Application number: CN202011307946.4A
Authority: CN
Inventors: 蔡旺; 韩以昌
Original assignee: Jingjiang Runxin Surface Engineering Technology Co ltd
Current assignee: Jingjiang Runxin Surface Engineering Technology Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-02-02

Abstract

The invention discloses a sealant with corrosion resistance, which is characterized by comprising the following components: epoxy resin, curing agent, flatting agent and diluent; the ratio of the epoxy resin to the curing agent is 1:1, and the ratio of the flatting agent to the diluent is 1: 19; the ratio of the epoxy resin to the diluent is 1: 8; the coating has the advantages of good corrosion resistance and good insulativity, and greatly increases the binding force of the coating; the operation is convenient, so that the service life of a product coated with the sealant is longer; the method is widely applicable to the thermal spraying coating application industries such as furnace rollers, piston rods, printing rollers and the like used in the industries of petroleum, thin films, papermaking and printing.

Description

Sealant with corrosion resistance

Technical Field

The invention relates to the field of sealants, in particular to a sealant with corrosion resistance.

Background

When the metal roller bodies such as the furnace roller, the piston rod, the printing roller and the like are used, the surface of the roller bodies is easy to corrode, so that the service life of the roller bodies is short; the replacement of the roller body not only increases the workload of workers and wastes time and labor, but also improves the use cost; the corrosion of the roller body directly causes that the roller body cannot work normally, and the production quality is influenced; in order to reduce the corrosion of the surface of the roller body, an anti-corrosion coating is usually required to be formed on the surface of the roller body; the coating of the existing thermal spraying technology has good wear-resisting effect on the surface of the roller. But the coating has gaps, the porosity of the ceramic coating is usually 3% -5%, and the coating is easy to lose efficacy and generate a shedding phenomenon under a corrosive environment. Therefore, after spraying, the special hole sealing agent is coated to enhance the corrosion resistance of the coating on the premise of ensuring the wear resistance of the coating, thereby meeting the production requirement.

Disclosure of Invention

The invention aims to provide the sealant with corrosion resistance, good corrosion resistance and good insulativity, and the bonding force of a coating is increased; the technical problem is solved.

In order to achieve the technical purpose and achieve the technical requirements, the invention adopts the technical scheme that: sealant with corrosion resistance, characterized in that: comprises the following components: epoxy resin, curing agent, flatting agent and diluent; the ratio of the epoxy resin to the curing agent is 1:1, and the ratio of the flatting agent to the diluent is 1: 19; the ratio of epoxy resin to diluent was 1: 8.

Preferably: the mass percent of the epoxy resin is 8-12%; the mass percent of the curing agent is 8-12%; the mass percent of the flatting agent is 3.36-5.04%, and the mass percent of the diluent is 64-96%.

Preferably: the preparation method comprises the following operation steps of firstly, respectively and fully mixing the epoxy resin, the flatting agent and the diluent in percentage by mass; putting the mixture into a storage tank A; step two, putting the curing agent in the storage tank B according to the mass percentage; and step three, pouring the curing agent in the step two into a storage tank A and uniformly stirring to obtain the sealant.

Preferably: the curing agent, the epoxy resin, the leveling agent and the diluent are mixed before the sealant is used.

The application of the sealant with corrosion resistance is characterized in that the sealant is coated on the surface of a thermal spraying coating, and the thickness of the thermal spraying coating is set to be 0.05-0.5 mm.

Preferably: the sealant is coated on the surface of the ceramic coating, and the penetration depth of the sealant is 0.5 mm.

Preferably: the sealant is coated on the surface of the coating with the compactness of less than 1%, and the penetration depth of the sealant is 0.3 mm.

The invention has the beneficial effects; the sealant with the corrosion resistance has good corrosion resistance and good insulativity, and greatly increases the binding force of a coating; the operation is convenient, so that the service life of a product coated with the sealant is longer; the method is widely applicable to the thermal spraying coating application industries such as furnace rollers, piston rods, printing rollers and the like used in the industries of petroleum, thin films, papermaking and printing.

Drawings

FIG. 1 is a schematic diagram of a test block of the present invention after spraying and before sealing;

FIG. 2 is a schematic diagram of a test block of the present invention after being soaked in 10% hydrochloric acid for 192 hours;

FIG. 3 is a table of experimental parameters for the test block of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantageous technical effects of the present invention clearer, the present invention is further described in detail below with reference to specific embodiments;

the sealant with corrosion resistance comprises epoxy resin, a curing agent, a flatting agent and a diluent; the ratio of the epoxy resin to the curing agent is 1:1, and the ratio of the flatting agent to the diluent is 1: 19; the ratio of epoxy resin to diluent was 1: 8.

The mass percentage of the epoxy resin is 8-12%; the mass percent of the curing agent is 8-12%; the mass percent of the flatting agent is 3.36-5.04%, and the mass percent of the diluent is 64-96%.

The operation steps for preparing the sealant are as follows: step one, respectively taking the epoxy resin, the flatting agent and the diluent in percentage by mass, and fully mixing; putting the mixture into a storage tank A; step two, putting the curing agent in the storage tank B according to the mass percentage; and step three, pouring the curing agent in the step two into a storage tank A and uniformly stirring to obtain the sealant. The curing agent, the epoxy resin, the leveling agent and the diluent are mixed before the sealant is used.

The prepared sealant is coated on the surface of a thermal spraying coating, and the thickness of the thermal spraying coating is set to be 0.05-0.5 mm. The sealant is coated on the surface of the ceramic coating, and the penetration depth of the sealant is 0.5 mm; the sealant is coated on the surface of the coating with the compactness of less than 1%, and the penetration depth of the sealant is 0.3 mm.

The invention is implemented specifically as follows: example 1: respectively taking 8 parts of epoxy resin, 3.36 parts of flatting agent and 64 parts of diluent, and fully mixing; putting the mixture into a storage tank A; then 8 parts of curing agent are taken and put into a storage tank B; before preparing to apply the sealant, the curing agent was poured into the storage tank a and stirred uniformly to obtain a sealant.

The sealing agent prepared by the formula is coated on the surface of a roller body made of a ceramic material, and the penetration depth of the sealing agent is 0.5 mm; the test proves that: the corrosion resistance and the insulativity are greatly improved, and the binding force of the coating is greatly increased.

Example 2: respectively taking 12 parts of epoxy resin, 5.04 parts of flatting agent and 96 parts of diluent, and fully mixing; putting the mixture into a storage tank A; then taking 12 parts of curing agent, and putting the curing agent into a storage tank B; before preparing to apply the sealant, the curing agent was poured into the storage tank a and stirred uniformly to obtain a sealant.

The sealant prepared by the formula is coated on the surface of a roller body made of tungsten carbide, and the penetration depth of the sealant is 0.3 mm; the test proves that: the corrosion resistance and the insulativity are greatly improved, and the binding force of the coating is greatly increased.

Example 3: respectively taking 10 parts of epoxy resin, 4.2 parts of flatting agent and 80 parts of diluent, and fully mixing; putting the mixture into a storage tank A; then 10 parts of curing agent are taken and put into a storage tank B; before preparing to apply the sealant, the curing agent was poured into the storage tank a and stirred uniformly to obtain a sealant.

The sealant prepared by the formula is coated on the surface of 45# steel, and tests prove that: the corrosion resistance and the insulativity are greatly improved, and the binding force of the coating is greatly increased.

Coating type of example 3: WC-CrC-Ni 73-20-7 aggl. Sintered

Coating thickness: 0.12-0.13mm

Base material: 45 steel

Substrate size: 100mm

The test block test parameter list is shown in FIG. 3;

the photograph of the sample after spraying and before sealing is shown in FIG. 1:

and (3) testing conditions are as follows: the picture of the sample after soaking in 10% hydrochloric acid for 192 hours is shown in fig. 2:

and (4) conclusion: it can be seen from the figure that the corrosion area of the test block is the smallest when the surface of the 45# steel test block is coated with the HC919 sealant of the present application.

The foregoing examples are given solely for the purpose of illustrating the invention and are not to be construed as limiting the embodiments, and other variations and modifications in form thereof will be suggested to those skilled in the art upon reading the foregoing description, and it is not necessary or necessary to exhaustively enumerate all embodiments and all such obvious variations and modifications are deemed to be within the scope of the invention.

Claims

1. Sealant with corrosion resistance, characterized in that: comprises the following components: epoxy resin, curing agent, flatting agent and diluent; the ratio of the epoxy resin to the curing agent is 1:1, and the ratio of the flatting agent to the diluent is 1: 19; the ratio of epoxy resin to diluent was 1: 8.

2. A sealant having corrosion resistance according to claim 1, wherein: the mass percent of the epoxy resin is 8-12%; the mass percent of the curing agent is 8-12%; the mass percent of the flatting agent is 3.36-5.04%, and the mass percent of the diluent is 64-96%.

3. A sealant having corrosion resistance according to claim 1, wherein: the preparation method comprises the following operation steps of firstly, respectively and fully mixing the epoxy resin, the flatting agent and the diluent in percentage by mass; putting the mixture into a storage tank A; step two, putting the curing agent in the storage tank B according to the mass percentage; and step three, pouring the curing agent in the step two into a storage tank A and uniformly stirring to obtain the sealant.

4. A sealant having corrosion resistance according to claim 3, wherein: the curing agent, the epoxy resin, the leveling agent and the diluent are mixed before the sealant is used.

5. Use of a sealant with corrosion resistance according to claim 1, characterized in that: the sealant is coated on the surface of the thermal spraying coating, and the thickness of the thermal spraying coating is set to be 0.05-0.5 mm.

6. Use of a sealant with corrosion resistance according to claim 5, characterized in that: the sealant is coated on the surface of the ceramic coating, and the penetration depth of the sealant is 0.5 mm.

7. Use of a sealant with corrosion resistance according to claim 5, characterized in that: the sealant is coated on the surface of the coating with the compactness of less than 1%, and the penetration depth of the sealant is 0.3 mm.