CN113278344B

CN113278344B - Anticorrosive and wear-resistant coating material suitable for thermal power generation desulfurization industry equipment

Info

Publication number: CN113278344B
Application number: CN202110790393.0A
Authority: CN
Inventors: 李怀新
Original assignee: Xiangyang City Hundred Shield Coating Material Co ltd
Current assignee: Xiangyang City Hundred Shield Coating Material Co ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2022-03-01
Anticipated expiration: 2039-06-17
Also published as: CN113278344A; CN113372793B; CN113372793A; CN113563786B; CN110272676A; CN113563786A; CN110272676B

Abstract

A coating material suitable for corrosion prevention and wear resistance of equipment in the thermal power generation and desulfurization industry comprises: the main agent comprises 30-150 parts of hydantoin resin, 5-40 parts of self-made No. 2 polyurethane prepolymer and 5-20 parts of reactive diluent; the curing agent comprises 10-60 parts of homemade No. 3 modified aromatic amine and 0.5-5 parts of accelerator; comprises 5-20 parts of main agent and/or curing agent total phosphorus flame retardant, 0-10 parts of nitrogen flame retardant, 0.5-5 parts of coupling agent, 0.5-5 parts of dispersing agent, 0.5-5 parts of defoaming agent, 0.5-5 parts of rheological agent, 50-350 parts of grinding material, 5-15 parts of fiber and 0-15 parts of pigment. The flame-retardant composite ceramic anticorrosive wear-resistant coating material is mainly applied to corrosion resistance and wear resistance of equipment in the thermal power generation desulfurization industry and is used for replacing glass flake daub.

Description

Anticorrosive and wear-resistant coating material suitable for thermal power generation desulfurization industry equipment

The application is a divisional application of invention patent application with the application number of '201910519534.8', the application date of 2019, 6 and 17 months, and the invention name of 'the flame-retardant composite ceramic anticorrosive wear-resistant coating material'.

Technical Field

The invention relates to an anticorrosive wear-resistant coating material, in particular to an anticorrosive wear-resistant coating material suitable for equipment in the thermal power generation desulfurization industry.

Background

At present, the domestic thermal power generation industry is provided with a desulfurizing device for SO in the discharged tail gas according to the environmental protection requirement₂And (3) carrying out removal treatment, wherein a limestone-gypsum wet desulphurization system is taken as a main part, the system operates under a damp and hot working condition, and flue gas and slurry have strong corrosion and erosive wear damage to equipment. At present, the most widely applied protective material in a wet desulphurization system at home is vinyl ester resin glass flake daub, which is called glass flake daub for short.

The vinyl glass flake daub is prepared by taking vinyl ester resin as a base material, dispersing a proper amount of quartz powder and glass flakes into the vinyl glass flake daub to prepare a daub shape, and adding an initiator and a catalyst for crosslinkingAnd the cured coating has excellent corrosion resistance. After a wet desulphurization device is installed in the thermal power industry, vinyl glass flake daub is always the first choice of anticorrosive material in the industry, but various problems also appear in the long-term use process and need to be solved: firstly, vinyl ester resin contains a large amount of styrene monomers which are highly inflammable, styrene volatilizes and deposits in the construction process, the concentration is gradually accumulated and increased, deflagration can be realized when the styrene meets naked fire slightly after reaching a flash point, the whole desulfurizing tower is ignited, the tower body is connected with a chimney, the airflow is pulled up, the wind assists the fire, and the fire can not be extinguished from the outside at all because the tower body is burnt inside, and only equipment can be burnt. The glass flake daub for the desulfurization tower has the disadvantages of fire accidents, casualties and great property loss every year. Secondly, the corrosion resistance and wear resistance of the glass flake daub are insufficient, strong scouring and abrasion action exists in a slurry collecting tank area on the tower wall of a spraying layer of the desulfurizing tower, and the phenomenon that a flake coating is scoured and worn through frequently occurs. The phenomena of hollowing, cracking and falling off often occur in the use process of the glass flake coating, and besides construction factors, the phenomena are easily caused by the inherent characteristics of vinyl ester resin. In the aspect of mechanical property indexes, although vinyl ester resin has higher tensile strength and bending strength, the tensile shear strength is very low and is 35kg/cm in one time due to large shrinkage rate (volume shrinkage rate is 7-10%) in the curing process²Hereinafter, tensile shear strength is an important mechanical property index for measuring the adhesion of a coating to a substrate. The large shrinkage and the small adhesion are also important factors for causing hollowing, cracking and falling of the coating.

Disclosure of Invention

The invention aims to provide a flame-retardant composite ceramic anticorrosive wear-resistant coating material which is used for preparing a safe and effective anticorrosive wear-resistant coating and reliably protecting equipment, steel structures, floors, walls and the like.

Aiming at the operating condition of limestone-gypsum wet desulphurization equipment and the defects of glass flake daub, the inventor obtains the coating applied to the wet desulphurization system equipment protection on the basis of years of practice, and the coating must meet the following conditions:

1. the material is resistant to damp-heat environment, and the physical and mechanical properties cannot be changed in the damp-heat environment.

2. The coating has good film forming property, excellent shielding capability and corrosion resistance.

3. The coating has certain wear resistance and can resist the scouring wear of slurry.

4. The coating has the advantages of no volatile solvent, super-strong flame retardant property and capability of effectively avoiding fire hazard during construction and maintenance.

5. The material and the base material have high bonding strength, and the tensile shear strength is up to 160kg/cm²The volume shrinkage rate in the material curing process is less than 0.5%.

6. The material has good toughness, and can adapt to deformation of the tower body caused by changes of air temperature and working temperature without cracking.

According to the above conditions, the present invention is designed, selected and implemented as follows: the main film forming matter is hydantoin resin, the hydantoin ring of the hydantoin resin is five-membered diazacyclo, the nitrogen element content is high, the hydantoin resin has certain flame retardant performance, and the flammability can be controlled by using less external flame retardant; the viscosity is low, and no or little diluent can be used; the wetting quality is good, and the bonding strength with the base material is high; the heat stability is good, and the damp-heat resistance is realized; aging resistance and corrosion resistance; the defects of large cohesion, brittleness and easy cracking; the brittleness problem must be solved by properly modifying to increase toughness. Traditional toughening is usually solved by adding liquid rubber, and the liquid rubber is dissociated among resins and does not participate in reaction, so that the heat resistance and the corrosion resistance are influenced. The invention self-prepares a polyurethane prepolymer which is dispersed in a hydantoin resin to be used as a toughening agent, uses modified aromatic amine as a curing agent of the resin, and simultaneously the modified aromatic amine is also a chain extender of the polyurethane prepolymer, and the modified aromatic amine and the chain extender react synchronously to form a homogeneous interpenetrating structure which is rigid and flexible, thereby effectively solving the brittleness problem of the hydantoin resin and simultaneously not influencing the heat resistance and the corrosion resistance.

The activity of the general polyurethane prepolymer is one order of magnitude higher than that of the hydantoin resin, the two are difficult to react synchronously to form a homogeneous structure, the activity of the polyurethane prepolymer which is suitable for being interpenetrated with the hydantoin resin should be extremely low, the curing speed of the polyurethane prepolymer is not greatly different from that of the hydantoin resin, and the polyurethane prepolymer does not need to be synthesized by self when sold in the market. Through a large number of tests, 1, 4-cyclohexane diisocyanate (CHDI) and tetramethylene ether glycol (PTMEG) are selected to synthesize a prepolymer with an NCO value of 2.5-4.5, the reaction speed of the prepolymer is equivalent to that of hydantoin resin, the compatibility of the polyurethane prepolymer and the hydantoin resin is good, the curing speed is synchronous, a homogeneous structure can be formed, the problem of brittleness of the hydantoin resin is solved, the heat resistance and the corrosion resistance are not affected, and meanwhile, the wear resistance of the material can be improved.

The specific preparation process of the self-made polyurethane prepolymer comprises the following steps: heating 1, 4-cyclohexane diisocyanate (CHDI) to 80-100 ℃ for melting and heat preservation, adding the CHDI into dehydrated PTMEG1000 or PTMEG2000, reacting for 40-60 minutes at 80-100 ℃, cooling and discharging for later use. The polyurethane prepolymer prepared by PTMEG2000 has better toughness but larger viscosity than that prepared by PTMEG 1000; prepolymers with low NCO values have good toughness, but low strength due to few crosslinking points. The embodiment of the invention selects prepolymer with NCO value of 4.2 synthesized by PTMEG1000 and CHDI as the No. 1 flexibilizer (self-made No. 1 polyurethane prepolymer), and has the characteristics of high strength and slightly low toughness; PTMEG2000 and CHDI are selected to synthesize a prepolymer with NCO value of 2.8 as a No. 2 flexibilizer (self-made No. 2 polyurethane prepolymer), and the toughening agent has the characteristics of good toughness and slightly low strength.

The hydantoin resin has high polarity, and when phenolic aldehyde amine and aliphatic amine with high polarity are selected as curing agents, the performance of the hydantoin resin is easily affected by moisture to reduce the performance, general information recommends that anhydride and aromatic amine are used as curing agents, and the anhydride needs to be heated and reacted, so that the anhydride is not suitable for an anticorrosive coating process; although the aromatic amine can cure the hydantoin resin at normal temperature, most of the aromatic amine is solid and is troublesome to use on site, and the modified liquid aromatic amine prepared by the invention is convenient to mix on site. The specific implementation is as follows: adding m-phenylenediamine (MPDA) and 4, 4-diaminodiphenylmethane (DDM) into 3, 5-diethyltoluenediamine (DETDA) according to a certain proportion, dissolving for 4 hours at 120 ℃, cooling to normal temperature and discharging for later use. The weight ratio of the three materials is DETDA: MPDA: DDM 100: 50-200: 50-200, and the different proportions affect the viscosity of the self-made curing agent and also affect the curing speed, the wear resistance and the heat resistance of the system. For example, the viscosity can be reduced by reducing the addition of MPDA and DDM when the DETDA is used in a constant amount; for example, the heat resistance can be improved by increasing the addition of MPDA and DDM without changing the DETDA; increasing the amount of MPDA increases the abrasion resistance of the cured product. The embodiment of the invention selects DETDA as the following components in parts by weight: MPDA: DDM 100: 50: 50 is used as a No. 1 curing agent (self-made No. 1 modified aromatic amine); selecting DETDA: MPDA: DDM 100: 100: 100 is used as a No. 2 curing agent (self-made No. 2 modified aromatic amine); selecting DETDA: MPDA: DDM 100: 150: 50 as No. 3 curing agent (self-made No. 3 modified aromatic amine).

Therefore, the invention provides a flame-retardant composite ceramic anticorrosive wear-resistant coating material, which comprises the following components in percentage by weight:

the main agent comprises 30-150 parts of hydantoin resin, 5-40 parts of self-made toughening agent and 5-20 parts of reactive diluent;

curing agent, which comprises 10-60 parts of self-made modified aromatic amine and 0.5-5 parts of accelerator;

comprises 5-20 parts of main agent and/or curing agent total phosphorus flame retardant, 0-10 parts of nitrogen flame retardant, 0.5-5 parts of coupling agent, 0.5-5 parts of dispersing agent, 0.5-5 parts of defoaming agent, 0.5-5 parts of rheological agent, 50-350 parts of grinding material, 5-15 parts of fiber and 0-15 parts of pigment.

Wherein, the reactive diluent is preferably glycidyl ether; the coupling agent can be KH550, KH560, KH570 or other coupling agents; the accelerator can be K54, naphthenic cobaltic acid or other accelerators; the thixotropic agent is preferably fumed silica; the phosphorus flame retardant is aluminum hypophosphite or other phosphorus flame retardants; the nitrogen flame retardant is melamine or other nitrogen flame retardants; selecting a self-made polyurethane prepolymer as a toughening agent; the dispersing agent is selected from small molecular alcohol compounds; selecting oil-based organic silicone oil as the defoaming agent; the abrasive is selected from silicon carbide powder, corundum powder, high-alumina ceramic powder and the like, and the particle size of the abrasive is preferably less than 180 mu m; the fiber is selected from one or a combination of several of aramid fiber, carbon fiber and glass fiber, the length of the fiber is less than 0.5mm, and the length-diameter ratio is more than or equal to 10. The pigment is selected from pigments with good acid and alkali resistance, such as titanium dioxide, carbon black, iron oxide red, chrome yellow, phthalocyanine blue, phthalocyanine green and the like, and has firm coloring, stability and no color change.

The main agent and the curing agent are independently processed during production, and various components are uniformly dispersed and mixed to form the curing agent. When the curing agent is used on site, the main agent and the curing agent are mixed according to a proportion for use. Preferably, the weight ratio of the main agent to the curing agent is 3:1-10: 1.

The flame-retardant composite ceramic anticorrosive wear-resistant coating material is mainly applied to corrosion resistance and wear resistance of equipment in the thermal power generation desulfurization industry and is used for replacing glass flake daub; the anti-corrosion and anti-abrasion device can also be used for protecting other equipment with anti-corrosion and anti-abrasion requirements, such as various tank bodies, pipelines, elbows, anti-corrosion and anti-abrasion of the inner surface and the outer surface of a tower body, workshop steel structures, metal stair footpaths, ocean tubular piles, ocean shore protection projects, workshop chemical-resistant terraces, sewage treatment facilities, wall bodies and concrete facilities, and the like.

In particular, the inventors propose specific combinations of coating components for different applications by a large number of field practices, thereby achieving the best application effect, as follows:

according to one aspect of the invention, a coating material suitable for corrosion resistance and wear resistance of equipment in the thermal power generation and desulfurization industry is provided, and the material comprises:

the main agent comprises 30-150 parts of hydantoin resin, 5-40 parts of self-made No. 2 polyurethane prepolymer and 5-20 parts of reactive diluent;

the curing agent comprises 10-60 parts of homemade No. 3 modified aromatic amine and 0.5-5 parts of accelerator;

According to another aspect of the present invention, there is provided a coating material for electrolytic nickel plant equipment and steel structural protective applications, the material comprising:

the main agent comprises 30-150 parts of hydantoin resin, 5-40 parts of self-made No. 1 polyurethane prepolymer and 5-20 parts of reactive diluent;

the curing agent comprises 10-60 parts of homemade No. 2 modified aromatic amine and 0.5-5 parts of accelerator;

According to yet another aspect of the present invention, there is provided a coating material suitable for chemical fertilizer plant shop floor and wall protection applications, the material comprising:

the curing agent comprises 10-60 parts of homemade No. 1 modified aromatic amine and 0.5-5 parts of accelerator;

In the actual use process, the effective protection time of the flame-retardant composite ceramic anticorrosive wear-resistant coating material is more than 2 times of that of scale daub and more than 10 times of that of common chlorosulfonated paint.

Detailed Description

The coating materials in the following specific examples are based on the weight of the respective component ratios in "parts".

The first embodiment is as follows: flue protection application of desulfurization tower of Xiangyang thermal power plant

The flame-retardant composite ceramic anticorrosive wear-resistant coating material is used for protecting the desulfurization tower and the flue of the Xiangyang thermal power plant for multiple times, and a good application effect is achieved. Before the material is applied, the plant is protected by traditional glass flake daub, generally, leaking points gradually appear after more than 3 months, repair and repair are carried out during maintenance, the plant is reluctant to use for about one and a half years, and the No. 1-3 desulfurizing tower and the flue of the plant adopt different schemes of the invention, are gradually put into use from 2015 8 months until the current (2019, 6 months), equipment still runs normally, and no leaking points appear.

The specific implementation process is as follows:

1.1 carrying out sand blasting treatment on the inner wall of the tower body and the inner wall of the flue to obtain a clean, dry and roughened surface.

1.2 preparing the flame-retardant composite ceramic anticorrosive wear-resistant coating material, brushing (rolling and blade coating) the material on the surface of the treated base material, and coating twice by a cross method.

1.3 curing at room temperature for 24 hours, detecting by using an electric spark side leakage instrument and supplementing.

1.4 after curing, the leakage is detected again until no leakage point exists.

1.5 using a film thickness meter to measure whether the thickness of the coating reaches the appointed thickness, if the thickness does not reach the appointed thickness, coating the coating again to the appointed thickness.

1.6 curing at room temperature for 24 hours and putting into use.

Example 1

A main agent: 60 parts of hydantoin resin, 10 parts of benzyl glycidyl ether, 15 parts of aluminum hypophosphite, 5 parts of melamine, 10 parts of self-made No. 2 polyurethane prepolymer, 1 part of isopropanol, 1 part of silicone oil, 3 parts of fumed silica, 100 parts of silicon carbide powder, 5 parts of glass fiber powder and 2 parts of phthalocyanine green.

Curing agent: 25 parts of self-made No. 3 modified aromatic amine, 5503 parts of a coupling agent and 541 parts of an accelerator K.

The tower wall No. 1 was run for 45 months with the spray layer area being brushed over again at 28 months.

Example 2

A main agent: 60 parts of hydantoin resin, 10 parts of 501 diluent, 15 parts of aluminum hypophosphite, 5 parts of melamine, 10 parts of self-made No. 2 polyurethane prepolymer, 1 part of isopropanol, 1 part of silicone oil, 3 parts of fumed silica, 120 parts of corundum powder, 5 parts of glass fiber powder and 2 parts of phthalocyanine green.

The tower wall No. 2 is operated for 45 months, wherein the spraying layer area is brushed again after 30 months.

Example 3

A main agent: 60 parts of hydantoin resin, 10 parts of active diluent AGE, 15 parts of aluminum hypophosphite, 5 parts of melamine, 10 parts of self-made No. 2 polyurethane prepolymer, 1 part of isopropanol, 1 part of silicone oil, 3 parts of fumed silica, 150 parts of high-alumina ceramic powder, 5 parts of glass fiber powder and 2 parts of phthalocyanine green.

The tower wall No. 3 runs for 45 months, wherein the spraying layer area is brushed again after 42 months.

Example 4

A main agent: 60 parts of hydantoin resin, 15 parts of benzyl glycidyl ether, 15 parts of aluminum hypophosphite, 5 parts of melamine, 15 parts of self-made No. 2 polyurethane prepolymer, 1 part of isopropanol, 1 part of silicone oil, 3 parts of fumed silica, 250 parts of silicon carbide powder, 5 parts of glass fiber powder and 2 parts of phthalocyanine green.

Curing agent: 27 parts of self-made No. 3 modified aromatic amine, 5503 parts of a coupling agent and 541 parts of an accelerator K.

The tower No. 1 original flue runs for 45 months and is intact.

Example 5

A main agent: 60 parts of hydantoin resin, 15 parts of polyethylene glycol diglycidyl ether, 15 parts of aluminum hypophosphite, 5 parts of melamine, 15 parts of self-made No. 2 polyurethane prepolymer, 1 part of isopropanol, 1 part of silicone oil, 3 parts of fumed silica, 180 parts of corundum powder, 5 parts of glass fiber powder and 2 parts of phthalocyanine green.

The tower 2 flue gas duct runs for 45 months, wherein the local coating is completed once at 30 months.

Example 6

A main agent: 60 parts of hydantoin resin, 15 parts of 1, 4-butanediol diglycidyl ether, 15 parts of aluminum hypophosphite, 5 parts of melamine, 15 parts of self-made No. 2 polyurethane prepolymer, 1 part of isopropanol, 1 part of silicone oil, 3 parts of fumed silica, 220 parts of high-alumina ceramic powder, 5 parts of glass fiber powder and 2 parts of phthalocyanine green.

The tower original flue No. 3 was run for 45 months, with a partial patch at 36 months.

Example 7

A main agent: 60 parts of hydantoin resin, 15 parts of diluent AGE, 18 parts of aluminum hypophosphite, 7 parts of melamine, 20 parts of self-made No. 2 polyurethane prepolymer, 1 part of isopropanol, 1 part of silicone oil, 2 parts of fumed silica, 50 parts of silicon carbide powder, 5 parts of glass fiber powder, 5 parts of titanium dioxide and 0.5 part of carbon black.

The tower No. 1 clean flue runs for 45 months perfectly.

Example 8

A main agent: 60 parts of hydantoin resin, 50115 parts of diluent, 18 parts of aluminum hypophosphite, 7 parts of melamine, 20 parts of self-made No. 2 polyurethane prepolymer, 1 part of isopropanol, 1 part of silicone oil, 3 parts of fumed silica, 50 parts of corundum powder, 5 parts of glass fiber powder, 5 parts of titanium dioxide and 0.5 part of carbon black.

The clean flue of tower 2 runs for 45 months perfectly.

Example 9

A main agent: 60 parts of hydantoin resin, 15 parts of benzyl glycidyl ether, 18 parts of aluminum hypophosphite, 7 parts of melamine, 20 parts of self-made No. 2 polyurethane prepolymer, 1 part of isopropanol, 1 part of silicone oil, 3 parts of fumed silica, 50 parts of high-alumina ceramic powder, 5 parts of glass fiber powder, 5 parts of titanium dioxide and 0.5 part of carbon black.

The tower No. 3 clean flue runs for 45 months perfectly.

Example II Jinchuan nickel industry electrolytic nickel workshop equipment and steel structure protection application

The acid mist of electrolytic nickel workshop of the Jinchuan nickel industry is large, the acid mist is a mixture of hydrochloric acid and sulfuric acid, the acid mist is attached to the surface of metal equipment to form an acid liquid film, various equipment and workshop steel structures in the workshop are seriously corroded, the chlorosulfonated paint is used for protection in the early stage, the phenomenon of cracking and peeling occurs in half a month of a paint film, maintenance workers are busy in polishing and coating operation all day long, the labor intensity is high, the protection effect is general, after the factory adopts the flame-retardant composite ceramic anticorrosive wear-resistant coating material from 2016, only one coating operation needs to be carried out in one year, the coating does not bulge and crack, the color and luster are stable, and a good using effect is obtained.

The specific implementation process is as follows:

2.1 polishing and cleaning the residual old paint and the base material of the part to be coated by using an angle grinder and a strip steel wire brush.

2.2 preparing the flame-retardant composite ceramic anticorrosive wear-resistant coating material, brushing or rolling on the surface of the treated base material, and coating twice by a cross method.

2.3 the product can be put into use after being cured.

Example 10

A main agent: 100 parts of hydantoin resin, 20 parts of polyethylene glycol diglycidyl ether, 10 parts of aluminum hypophosphite, 5 parts of melamine, 20 parts of self-made No. 1 polyurethane prepolymer, KH 5603 parts of coupling agent, 1 part of isopropanol, 2 parts of silicone oil, 4 parts of fumed silica, 80 parts of high-alumina ceramic powder, 5 parts of glass fiber powder, 20 parts of titanium dioxide and 1 part of carbon black.

Curing agent: 40 parts of self-made No. 2 modified aromatic amine and 541 parts of accelerant K.

The steel structure used in the electrolytic nickel workshop is good for 1 year.

Example 11

A main agent: 100 parts of hydantoin resin, 20 parts of benzyl glycidyl ether, 10 parts of aluminum hypophosphite, 5 parts of melamine, 20 parts of self-made No. 1 polyurethane prepolymer, KH 5603 parts of coupling agent, 1 part of isopropanol, 2 parts of silicone oil, 4 parts of fumed silica, 80 parts of ceramic powder, 5 parts of glass fiber powder and 20 parts of chrome yellow.

Is used for hoisting in an electrolytic nickel workshop for 1 year.

Example 12

A main agent: 100 parts of hydantoin resin, 20 parts of diluent AGE, 10 parts of aluminum hypophosphite, 5 parts of melamine, 20 parts of self-made No. 1 polyurethane prepolymer, KH 5603 parts of coupling agent, 1 part of isopropanol, 2 parts of silicone oil, 4 parts of fumed silica, 80 parts of high-alumina ceramic powder, 5 parts of glass fiber powder, 15 parts of titanium dioxide and 5 parts of phthalocyanine blue.

Is used for a normal-temperature storage tank in an electrolytic nickel workshop for 1 year.

Example 13

A main agent: 100 parts of hydantoin resin, 20 parts of polyethylene glycol diglycidyl ether, 10 parts of aluminum hypophosphite, 5 parts of melamine, 20 parts of self-made No. 1 polyurethane prepolymer, KH 5603 parts of coupling agent, 1 part of isopropanol, 2 parts of silicone oil, 4 parts of fumed silica, 80 parts of high-alumina ceramic powder, 5 parts of glass fiber powder and 10 parts of phthalocyanine blue.

Is used for a medium-temperature storage tank (50-100 ℃) in an electrolytic nickel workshop for 1 year.

Example 14

A main agent: 100 parts of hydantoin resin, 20 parts of 1, 4-butanediol diglycidyl ether, 10 parts of aluminum hypophosphite, 5 parts of melamine, 20 parts of self-made No. 1 polyurethane prepolymer, 5603 parts of coupling agent KH, 1 part of isopropanol, 2 parts of silicone oil, 4 parts of fumed silica, 80 parts of high-alumina ceramic powder, 5 parts of glass fiber powder and 10 parts of phthalocyanine green.

Is used for 1 year of good condition in a high-temperature storage tank (100 ℃ C. and 150 ℃ C.) in an electrolytic nickel workshop.

Example 15

A main agent: 100 parts of hydantoin resin, 50120 parts of diluent, 10 parts of aluminum hypophosphite, 5 parts of melamine, 20 parts of self-made No. 1 polyurethane prepolymer, KH 5603 parts of coupling agent, 1 part of isopropanol, 2 parts of silicone oil, 4 parts of fumed silica, 80 parts of high-alumina ceramic powder, 5 parts of glass fiber powder, 20 parts of titanium dioxide and 1 part of carbon black.

The outer surface of the electrolytic cell used in the electrolytic nickel workshop is intact for 1 year.

Example three-stringed bowed instrument integrates dayukou chemical fertilizer plant multilayer workshop terrace protection application

The terrace of a multi-layer workshop of a Peugu fertilizer plant is corroded by alkali liquor and seriously permeates, the phenomenon of ice hanging is formed after the alkali liquor on a ceiling is crystallized, the building structure and the safety production are seriously influenced, the composite ceramic anti-corrosion wear-resistant coating material is adopted for protection, crystalline alkali is cleaned and washed before the protection, the surface of concrete is sealed and filled, the composite ceramic anti-corrosion wear-resistant coating material is coated by rolling twice, a chemical-resistant coating and a chemical-resistant terrace are formed on the inner surface of the whole building structure, and the alkali liquor seepage phenomenon is not found until the completion of the engineering.

The specific implementation process is as follows:

3.1 mechanical cleaning of the outer leaking crystallization alkali.

3.2 preparing 5% oxalic acid solution, rolling and coating on the surface of concrete, repeating for several times until no foam is generated.

3.3 washing the concrete surface with clear water and drying.

3.4 brushing chemical-resistant sealant on the surface of the concrete after air drying, and air drying again.

3.5 preparing the extension formula product in the shape of daub of the flame-retardant composite ceramic anticorrosive wear-resistant coating material according to the proportion, and filling the pits and holes on the surface of the concrete to enable the concrete to be flat.

3.6 preparing the flame-retardant composite ceramic anticorrosive wear-resistant coating material of the invention, brushing (rolling coating) on the surface of the treated concrete, and coating twice by a cross method.

3.7 after curing, the material can be put into use after 24 hours.

Example 17

A main agent: 50 parts of hydantoin resin, 8 parts of benzyl glycidyl ether, 5 parts of aluminum hypophosphite, 3 parts of melamine, 10 parts of self-made No. 1 polyurethane prepolymer, 1 part of isopropanol, 1 part of silicone oil, 6 parts of fumed silica, 200 parts of high-alumina ceramic powder, 5 parts of glass fiber powder, 10 parts of titanium white and 0.5 part of carbon black.

Curing agent: 20 parts of self-made No. 1 modified aromatic amine, 3 parts of a coupling agent KH, 541 parts of an accelerator K, 60 parts of high-alumina ceramic powder and 2 parts of fumed silica.

The method is used for filling defects such as concrete surface pits and holes.

Example 18

A main agent: 150 parts of hydantoin resin, 20 parts of polyethylene glycol diglycidyl ether, 10 parts of aluminum hypophosphite, 5 parts of melamine, 25 parts of self-made No. 1 polyurethane prepolymer, KH 5603 parts of coupling agent, 1 part of isopropanol, 2 parts of silicone oil, 3 parts of fumed silica, 150 parts of high-alumina ceramic powder, 5 parts of glass fiber powder, 10 parts of titanium white and 0.5 part of carbon black.

Curing agent: 60 parts of No. 1 modified aromatic amine and 541 parts of an accelerator K.

The alkali liquor-resistant floor is used for forming a chemical-resistant coating and a chemical-resistant floor on the inner surface of a building structure after alkali liquor in a fertilizer plant leaks, and has a good anti-permeability effect and slight scratch on the floor surface after being applied for 3 years.

The embodiment shows that compared with vinyl ester glass flake daub, the vinyl ester glass flake daub applied to the protection of wet desulphurization system equipment has obvious advantages in the aspects of flame retardance, wear resistance, peeling resistance and other performances, can generally achieve more than 2 times of the protection effect of the flake daub, and is safe and flame retardant. The paint has longer service life than the traditional paint in the aspect of corrosion of general chemicals, can be used for anti-permeability and corrosion prevention of workshops and floors and walls, and particularly has remarkable effect on the corrosion working condition of fluid belt scouring and abrasion.

Claims

1. A coating material suitable for corrosion prevention and wear resistance of equipment in the thermal power generation and desulfurization industry comprises: based on the weight portion, the weight portion of the material,

5-20 parts of phosphorus flame retardant, 0-10 parts of nitrogen flame retardant, 0.5-5 parts of coupling agent, 0.5-5 parts of dispersing agent, 0.5-5 parts of defoaming agent, 0.5-5 parts of rheological agent, 50-350 parts of grinding material, 5-15 parts of fiber and 0-15 parts of pigment in a main agent and/or a curing agent;

the preparation process of the No. 2 polyurethane prepolymer comprises the following steps: heating 1, 4-cyclohexane diisocyanate (CHDI) to 80-100 ℃ for melting and heat preservation, adding the CHDI into dehydrated PTMEG1000 or PTMEG2000, reacting for 40-60 minutes at 80-100 ℃, cooling and discharging for later use; obtaining a self-made polyurethane prepolymer with NCO value of 2.8;

the preparation process of the self-made No. 3 modified aromatic amine comprises the following steps: adding m-phenylenediamine MPDA and 4, 4-diaminodiphenylmethane DDM into 3, 5-diethyltoluenediamine DETDA according to a certain ratio, dissolving for 4 hours at 120 ℃, cooling to normal temperature and discharging for later use; the weight ratio of the three materials is DETDA: MPDA: DDM = 100: 150: 50.

2. the coating material suitable for corrosion prevention and wear resistance of equipment in the thermal power generation and desulfurization industry according to claim 1, wherein the abrasive is selected from one or a combination of silicon carbide powder, corundum powder and high-alumina ceramic powder, and the particle size of the abrasive is less than 180 μm.

3. The coating material suitable for corrosion prevention and wear resistance of equipment in the thermal power generation desulfurization industry as claimed in claim 1, wherein the phosphorus flame retardant is aluminum hypophosphite, and the nitrogen flame retardant is melamine.

4. The coating material suitable for corrosion prevention and wear resistance of equipment in the thermal power generation desulfurization industry as claimed in claim 1, wherein the fiber is one or more of aramid fiber, carbon fiber and glass fiber, the length of the fiber is less than 0.5mm, and the length-diameter ratio of the fiber is greater than or equal to 10.

5. The coating material suitable for corrosion prevention and wear resistance of equipment in the thermal power generation desulfurization industry according to claim 1, wherein the reactive diluent is glycidyl ether.