CN111484796A

CN111484796A - Corrosion-resistant basalt scale daub and preparation method thereof

Info

Publication number: CN111484796A
Application number: CN202010317959.3A
Authority: CN
Inventors: 刘国玲; 刘中生
Original assignee: Weifangzhong Innovation Material Technology Co ltd
Current assignee: Weifangzhong Innovation Material Technology Co ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-08-04

Abstract

The invention discloses corrosion-resistant basalt scale daub and a preparation method thereof, belongs to the technical field of pipeline corrosion resistance, and solves the technical problems of poor corrosion resistance and low mechanical property of the existing scale daub. The basalt scale daub is prepared from the following raw materials in parts by weight: 16-18 parts of resin, 4-6 parts of basalt flakes, 2-3 parts of filler and 3-4 parts of additive; wherein the filler comprises SiO₂Particles and carbon black, additives including a curing speed modifier, a silane surface treatment agent and a viscosity modifier. The preparation method comprises the following steps: s2-1: adding scale, filler and additiveMixing the components uniformly; s2-2: adding resin and stirring to be uniform; s2-3: discharging bubbles introduced during stirring; s2-4: standing for 1.5-2.5 hours in a sealed state. The basalt scale daub can be used for preparing a corrosion-resistant layer of a desulfurization pipeline, and has better corrosion resistance and mechanical property.

Description

Corrosion-resistant basalt scale daub and preparation method thereof

Technical Field

The invention relates to the technical field of pipeline corrosion prevention, in particular to corrosion-resistant basalt scale daub and a preparation method thereof.

Background

The desulfurization pipeline is a main process pipeline of a sulfuric acid workshop of a smelting plant, and is an electric spray device and a dry device which are positioned in a purification processBetween drying towers in the drying process. The function of the method is to purify the copper smelting flue gas (mainly containing SO) of the smelting workshop through the purification process₂) Conveying to a drying process, dehydrating and drying by concentrated sulfuric acid, and then conveying to a converter for reaction and conversion into SO₃。

With the gradual use of the glass flakes as an anticorrosive coating on the inner layer of the pipeline, the corrosion phenomenon is further improved. The invention patent with the publication number of CN 106479327B discloses a vinyl ester resin glass flake daub coating, wherein the formula of the flake daub comprises the following components: 98.0 of vinyl ester resin, 1.0 to 3.0 of fumed silica, 1.0 to 2.0 of thixotropic stabilizer, 1.0 to 10.0 of low shrinking agent, 0.5 to 1.5 of coupling agent, 0.5 to 2.0 of promoter B, 0.5 to 1.0 of defoaming agent, 1.0 to 4.0 of color paste, 50.0 of 20-mesh glass flake, 5.0 of 80-mesh glass flake, 5.0 of 120-mesh glass flake, 10.0 of 800-mesh mica powder and 1.0 to 4.0 of 90 percent cumene hydroperoxide.

At present, glass flakes are widely researched and applied by the chemical production industry as the main corrosion-resistant layer of the desulfurization pipeline, but when the daub is used in a flake flue, the use environment is severe because the desulfurization pipeline contains more corrosive gas, so that when the glass flakes are used in the desulfurization pipeline, the phenomenon of perforation after the desulfurization pipeline is corroded is often found, and in severe cases, hundreds of repairing points are reached, and the production efficiency is seriously influenced. In addition, when the glass flakes are used as the main corrosion-resistant layer of the desulfurization pipeline in the chemical production industry, the desulfurization pipeline used in the large-scale industrial production can transmit vibration waves due to the mechanical vibration of a large-scale machine, and particularly, when the tensile strength and the bending strength of the daub layer are not high, cracks or microcracks appear at the daub layer after endless vibration, so that the daub layer is easy to fall off, and the corrosion resistance of the desulfurization pipeline is reduced.

Disclosure of Invention

Aiming at the defects in the prior art, the first purpose of the invention is to provide the corrosion-resistant basalt scale daub which has the advantages of better corrosion resistance, higher tensile strength and bending strength.

The second purpose of the invention is to provide a preparation method of the corrosion-resistant basalt scale daub, which has the advantages that the raw materials for preparing the corrosion-resistant basalt scale daub are better mixed, so that the product obtains higher tensile strength and bending strength, the preparation method is simple, and the industrialization is facilitated.

In order to achieve the first object, the invention provides the following technical scheme: a corrosion-resistant basalt flake daub,

the basalt scale daub is prepared from the following raw materials in parts by weight:

16-18 parts of resin,

4-6 parts of basalt flakes,

2-3 parts of a filler,

3-4 parts of an additive,

wherein the filler comprises SiO₂Particles and carbon black, the additives including a cure rate modifier, a silane surface treatment agent, and a viscosity modifier; the arrangement mode of the basalt scales in the basalt scale daub is staggered up and down and arranged in parallel.

By adopting the technical scheme, the invention takes resin as a main film forming agent, takes basalt scales as aggregate and then is added with a filler (SiO)₂Particles and carbon black) and additives (curing speed regulator, silane surface treatment agent and viscosity regulator) to form a composite resin cement. After the basalt flakes are introduced into resin, the shrinkage rate of the film forming agent can be reduced, the internal stress between a daub layer and a substrate is eliminated, cracking and peeling are inhibited, the adhesive force is improved, and the impact resistance is good; meanwhile, the arrangement mode that the basalt scales are staggered up and down and arranged in parallel in the basalt scale daub generates a labyrinth effect, and the distance that small molecules such as acid, alkali and the like enter the basalt scale daub and finally enter the surface of a pipeline is increased, so that the corrosion resistance of the basalt scale daub is enhanced. Because the basalt scales are inorganic materials and the resin is organic materials, in order to make the adhesion between the basalt scales and the resin better, the silane surface treating agent is added through the surface of the basalt scalesThe surface treatment is used for promoting the interaction force between the basalt scales and the resin, the addition of the curing speed regulator accelerates the curing speed of the resin, the viscosity of the cement is increased due to the addition of the viscosity regulator, and the cement has two advantages after the viscosity is increased; and secondly, the prepared daub has stronger viscosity when being used for an anticorrosive coating of a pipeline and the pipeline, and is not easy to fall off. The filler is made of SiO₂The particles are used as reinforcing agent and fill the gaps between the raw materials at the same time, because of SiO₂The particles have small size effect and large specific surface area, and the surface of the particles contains a plurality of silicon hydroxyl groups, SiO₂The network structure can be formed among the particles under the action of hydrogen bonds and Van der Waals force, so that the internal structure of the basalt flake is tighter, the corrosion resistance is enhanced, and the tensile strength and the bending strength are relatively higher. The carbon black has small particle size (as low as 5nm), and can compensate large particles (SiO) in the basalt scale cement₂Particles and basalt flakes) is a better reinforcing material; meanwhile, the thickening agent is used in the invention, so that the consistency of the prepared basalt scale daub is better.

Further, the SiO₂The mass ratio of the particles to the carbon black is 1-2: 1.

by adopting the technical scheme, the SiO₂The particle size of the particles is larger than that of the carbon black, and the carbon black with smaller particle size can enter SiO₂And in microscopic gaps of the particles, the mechanical property of the final daub product is further enhanced. If it is SiO₂The particles are used in excess, first of all SiO₂Microscopic pores among the particles cannot be fully filled, and the compactness of a final product is reduced, so that the barrier effect of the cement product on acid and alkali corrosion substances is weakened, and the tensile strength and the bending strength are relatively reduced; meanwhile, the thickening effect of the carbon black is weakened, so that the prepared basalt scale daub is relatively soft and has insufficient mechanical strength. SiO 2₂Too little amount of particles will also result in a decrease in the filler content of the resin, and to achieve a certain product corrosion protection, the amount of resin will be increased, so thatThe preparation cost of the basalt flake daub is increased. Therefore, under the raw material proportion, the performances of the basalt scales are mutually promoted, so that the final basalt scale daub is higher in acid and alkali corrosion resistance, tensile strength and bending strength.

Further, the filler also comprises mica powder, and the SiO powder₂The mass ratio of the particles to the mica powder is 0.5-1.5: 2.

further, the granularity of the mica powder is not more than 2um, and the SiO powder₂The particle size is 20-25 um.

By adopting the technical scheme, the mica powder as a non-metallic mineral contains a plurality of components, wherein SiO is mainly contained₂The content is about 49% in general, and Al₂O₃The content is about 30 percent. The mica powder has the characteristics of good elasticity, toughness, insulativity, high temperature resistance, acid and alkali resistance, corrosion resistance, strong adhesive force and the like; the particle size of mica powder is relative to that of SiO₂The particles are smaller, the smaller the particle size is, the larger the specific surface area is, the better the reinforcing effect is, the higher the hardness is, the SiO₂The particles and the mica powder are used as reinforcing materials together, and the mica powder with smaller particle size enters SiO with larger particle size₂Gaps among the particles are filled, so that the mechanical property, the wear resistance and the corrosion resistance of the prepared basalt scale daub are enhanced while the microscopic pores of the prepared basalt scale daub are reduced. And basalt scales and SiO₂The particle size ranges of the particles, the mica powder and the carbon black are sequentially reduced (the basalt scales are 170-300 mu m, and SiO is₂The particle size of the mica powder is not more than 2 mu m, and the particle size of the carbon black is as low as 5nm), and the four inorganic raw materials fill the space in the resin step by step, so that the prepared basalt flake daub has a compact structure, the acid and alkali corrosion resistance is enhanced, and the tensile strength and the bending strength are also increased.

Further, the thickness of the basalt scales is 2-4 um, and the particle size is 170-300 um.

Further, the curing speed regulator is p-hydroxybenzene sulfonic acid, the silane surface treating agent is silane gamma-glycidyl ether oxypropyl trimethoxy silane, and the viscosity regulator is ethylene bis stearamide; the mass ratio of the p-hydroxybenzene sulfonic acid to the gamma-glycidyl ether oxypropyl trimethoxy silane to the ethylene bis-stearic acid amide is 1-2: 1: 1.5-3. .

By adopting the technical scheme, through the addition of the curing speed regulator, the surface treating agent and the viscosity regulator, firstly, the silane surface treating agent is gamma-glycidoxypropyltrimethoxysilane, which can well mix organic resin and inorganic filler (SiO)₂Particles and mica powder) and organic resin and inorganic basalt scales are coupled together, so that the adhesiveness between the particles and the mica powder is stronger, the isolation hindering acting force of the prepared basalt scale cement on acid-base corrosive substances is stronger, and the acid-base resistance is stronger. The ethylene bis-stearic acid amide is used as a viscosity regulator, and not only is the viscosity of the raw material regulated; simultaneous pair filler (SiO)₂Particles, carbon black and mica powder) has a certain dispersion effect, so that the filler has better dispersion uniformity in the process of stirring the raw materials, and SiO is further promoted₂The particles, the carbon black and the mica powder better fill microscopic pores of the basalt scale daub, so that the basalt scale daub is more compact, the effect of blocking corrosive substances such as acid and alkali is stronger, and the tensile strength and the bending strength are also better; the dispersion stability of the basalt scales is further improved, and the settlement phenomenon of the basalt scales is avoided.

Further, the resin is bisphenol A type unsaturated polyester resin or trifunctional epoxy resin, the viscosity of the bisphenol A type unsaturated polyester resin is 0.4-0.6 Pa.s, the acid value is 14-36 mg KOH/g, and the gelling time is 12-25 min; the trifunctional epoxy resin has an epoxy equivalent of 0.96/100g and a viscosity of 1700 pas.

By adopting the technical scheme, the basalt scales are pure natural products of basalt, have excellent corrosion resistance, and form daub with the resin, so that the basalt scales have excellent corrosion resistance and good mechanical properties.

In order to achieve the second object, the invention provides the following technical scheme: the preparation method of the corrosion-resistant basalt scale daub comprises the following steps:

s1: adding the scales, the filler and the additive, and mechanically stirring uniformly;

s2: equally dividing the resin into three equal parts, adding the resin into the mixture obtained in the step S2-1 in three times, and stirring the resin uniformly after each addition;

s3: vacuumizing or mechanically oscillating to discharge bubbles introduced during stirring of the raw materials;

s4: standing for 1.5-2.5 hours in a sealed state.

By adopting the technical scheme, the prepared basalt scale daub is compact and has high corrosion resistance and mechanical property.

Further, the preparation process of the basalt scales comprises the following steps:

(1) crushing, cleaning and weighing basalt, wherein the single-grain crushing granularity is 2-4 mm;

(2) melting basalt, wherein the melting temperature is 1350-1410 ℃, and preserving heat for 27-33 min;

(3) the melt is vacuumized to 10 degrees under the closed condition^-3Pa, mechanically stirring for 1-3 min under a vacuum state;

(4) and blowing and molding the melt under the pressure of 3-3.5 MPa after the melt enters the mold, and slowly cooling the melt to form molded scales.

In conclusion, the invention has the following beneficial effects:

firstly, the invention takes resin as a main film forming agent, takes basalt scales as aggregate, and then adds filler and additive to form the composite resin daub. The addition of the additive further promotes the adhesiveness between the resin and the basalt scale, and the addition of the filler reduces microscopic pores and improves the compactness of the cement paste for preparing the basalt scale, so that the final product performance of the cement paste for preparing the basalt scale is improved, and the corrosion resistance, tensile strength and bending strength of the final cement paste for preparing the basalt scale are better.

Second, SiO is preferably used in the present invention₂Particles, mica powder and carbon black are used as fillers, and the mica powder has good elasticity and toughness,Acid and alkali resistance, corrosion resistance and the like, and SiO₂The particles and the mica powder are complementary in granularity, so that the corrosion resistance and the mechanical property of the prepared basalt scale daub are enhanced while the microscopic gaps of the basalt scale daub are reduced.

And thirdly, the additive is selected from gamma-glycidoxypropyltrimethoxysilane, ethylene bis stearamide and p-hydroxyphenylsulfonic acid, so that the adhesion among raw materials is stronger while the curing process is effectively regulated, the viscosity of the raw materials is regulated, the ethylene bis stearamide has a good dispersing effect on mica powder and carbon black, and the settlement of basalt scales is prevented, so that the filler has good dispersion uniformity in the raw material stirring process, the microstructure of the basalt scale daub is more compact and uniform, and the corrosion resistance, tensile strength and bending strength of a final product are further enhanced.

Detailed Description

The present invention will be described in further detail with reference to examples.

The raw materials are commercially available, and the bisphenol A type unsaturated polyester resin is purchased from Jinan Yisheng resin Co., Ltd, and the product model is Y-146; the trifunctional epoxy resin is purchased from Shanghai friendship resin Co., Ltd, and has the product model of MY-0500; SiO 2₂The particles are purchased from Timer (Beijing) New Material science and technology Limited, and the product model is 4N; the carbon black is purchased from Shanghai Likangming chemical industry Co., Ltd, and the product model is N220; CAS number for p-hydroxybenzenesulfonic acid is: 98-67-9, available from Guangzhou Huao chemical Co., Ltd, product type C₆H₆O₄S; the CAS number of ethylene bis stearamide is: 110-30-5, available from Shanghai Ji to Biochemical technology, Inc., and having a product type of formula C₃₈H₇₆N₂O₂(ii) a The gamma-glycidoxypropyltrimethoxysilane is purchased from Oscar organosilicon Co., Ltd, and has the product model of KH 560; the 901 type vinyl resin is purchased from the North Hebei jumping anticorrosive materials Co.

Preparation examples of raw materials

Preparation example 1

Preparation of basalt scales

The process comprises the following steps:

(2) melting basalt, keeping the melting temperature at 1350 ℃ for 27 min;

(3) the melt is vacuumized to 10 degrees under the closed condition^-3Pa, mechanically stirring for 1min under a vacuum state, wherein the stirring speed is 150 r/min;

(4) and blowing and molding the melt under the pressure of 3MPa after the melt enters the mold, and slowly cooling to room temperature to obtain molded scales.

The thickness of the prepared basalt scales is 2-4 um, and the particle size is 170-300 um.

Preparation example 2

Preparation of basalt scales

The process comprises the following steps:

(2) melting basalt, keeping the melting temperature at 1410 ℃ for 33 min;

(3) the melt is vacuumized to 10 degrees under the closed condition^-3Pa, mechanically stirring for 3min under a vacuum state, wherein the stirring speed is 180 r/min;

(4) and blowing and molding the melt under the pressure of 3.5MPa after the melt enters the mold, and slowly cooling to room temperature to obtain molded scales.

Preparation example 3

Preparation of basalt scales

The process comprises the following steps:

(2) melting basalt, wherein the melting temperature is 1380 ℃, and keeping the temperature for 30 min;

(3) the melt is vacuumized to 10 degrees under the closed condition^-3Pa, mechanically stirring for 2min under vacuum condition with stirring speed of 170r/min；

(4) And blowing and molding the melt under the pressure of 3.3MPa after the melt enters the mold, and slowly cooling to room temperature to obtain molded scales.

Examples

Example 1

The invention provides corrosion-resistant basalt scale daub which is prepared from the following raw materials in parts by weight:

16Kg of resin, 4Kg of basalt flakes, 2Kg of filler and 3Kg of additive, wherein the resin is bisphenol A type unsaturated polyester resin, the viscosity of the resin is 0.4-0.6 Pa.s, the acid value is 14-36 mgKOH/g, the gelling time is 12-25 min, the solid content is 58-64%, and the resin is specifically Y-146 type bisphenol A type unsaturated polyester resin; the basalt flakes are prepared from preparation example 3; the filler is SiO₂The particles and carbon black were mixed in a ratio of 1:1, wherein SiO is mixed₂The particle size is 20-25 um; the additive is a mixture of a curing speed regulator, a silane surface treatment agent and a viscosity regulator which are mixed according to the mass ratio of 1:1:1.5, wherein the curing speed regulator is p-hydroxybenzene sulfonic acid, the silane surface treatment agent is gamma-glycidoxypropyltrimethoxysilane, specifically KH560 type gamma-glycidoxypropyltrimethoxysilane, and the viscosity regulator is ethylene bis stearamide.

A preparation method of the corrosion-resistant basalt scale daub comprises the following steps:

s3: vacuumizing or mechanically oscillating to discharge bubbles introduced during stirring of the daub;

s4: standing for 1.5h in a sealed state.

And (3) preparing the obtained corrosion-resistant basalt scale daub into a plate, and then detecting correlation performance parameters.

Examples 2 to 13

Examples 2-13 differ from example 1 in the raw materials and/or amounts used to make the corrosion resistant basalt flake cement, as shown in table 1, and otherwise in example 1.

Table 1 formulations and proportions for making corrosion resistant basalt flakes cement of examples 1-13

The trifunctional epoxy resin has an epoxy equivalent of 0.96/100g and a viscosity of 1700 Pa.s, and is specifically aminophenol trifunctional epoxy resin, the product model is MY-0500, the trifunctional epoxy resin is a reddish brown viscous liquid, and the proportion of non-volatile parts is 98.5%.

Comparative examples 1 to 9

Comparative examples 1 to 9 are different from example 1 in the raw materials and/or the amounts of the raw materials for preparing the corrosion-resistant basalt flake plaster, and are shown in table 2, and the others are the same as example 1.

Table 2 formula and ratio for preparing corrosion-resistant basalt flake daub in comparative examples 1-9

Comparative example 9

The difference between the comparative example and the example 13 is that the basalt scales are replaced by the same amount of glass scales, the thickness of the glass scales is 2-5 mu m, and the particle size is 170-300 mu m.

Comparative example 10

Comparative example 13 differs in that this comparative example replaces the unsaturated polyester resin of type Y-46 bisphenol A with an equivalent amount of vinyl resin. The specific model of the vinyl resin is 901 type vinyl resin.

(I) mechanical Property measurement

(1) Tensile property test specimen

The tensile strength, tensile modulus and elongation at break tests were carried out according to the regulations of HG/T3797-2005 and the thickness of the test specimen was 4mm according to the relevant regulations of GB/T1447-2005.

(2) Bending property test specimen

The bending strength and the bending modulus are performed according to the regulations of HG/T3797-2005 and the thickness of the sample is 4mm according to the relevant regulations of GB/T1449-2005.

(3) Impact performance test specimens.

According to the regulations of HG/T3797-.

The mechanical properties of the scale cement sheets prepared by the one-step method in examples 1 to 13 and comparative examples 1 to 9 were tested, and the test results are shown in table 3.

(II) acid and alkali corrosion resistance detection

The test block used in the corrosion resistance test is 20mm × 20mm × 20mm in size, is soaked for a certain time at a fixed temperature, is taken out after being soaked for a specified time, is washed clean with water, is sucked to dry the surface of the test block by test paper, is subjected to various tests, and is evaluated for corrosion resistance according to the change of weight.

The preparation method of the test block comprises the steps of stirring and mixing the daub powder uniformly at room temperature, pouring the daub powder into a stainless steel mold with the inner size of 20mm × 20mm × 20mm, dispersing the daub uniformly as much as possible in the pouring process, demolding after curing at room temperature for 50-60 min, and testing the prepared daub according to the regulation of the building anti-corrosion engineering construction and acceptance Specification GB 50212-2014, wherein each group of samples has 3 parallel samples.

The acid and alkali resistance of the scale cements prepared in examples 1-13 and comparative examples 1-10 were measured, and the results are shown in table 3.

Weight change (%) - (W)₁-W₀)/W₀×100％，

Wherein, W₁Is the final weight, W, of the basalt scale cement₀Is the initial weight of the basalt scale cement.

Table 3 shows the mechanical properties and the acid and alkali corrosion resistance of the scale mastic prepared by the schemes of examples 1-13 and comparative examples 1-10

As shown in table 3, it is seen from the data of the five basalt scale cements of comparative examples 3 to 5 and comparative examples 3 to 4 that, in the raw materials for preparing the scale cement, the amount of basalt scales is large for the mechanical properties of the finally prepared scale cement, and the reduction of the amount of basalt scales directly affects the tensile strength of the finally prepared scale cement, and the bending strength and the impact strength thereof are also correspondingly reduced. However, when the amount of the basalt scales is too large, the tensile strength of the finally prepared scale cement is reduced, the amount of the basalt scales is increased, the dosage ratio of each raw material to the basalt scales is directly influenced, the mutual matching relationship between the raw materials is influenced, and the product performance of the finally prepared scale cement is reduced. Further explanation is: after the dosage of the basalt scales is reduced, various strength indexes of the basalt scale daub are reduced because the content of the basalt scales serving as a reinforcing phase is low, the mechanical strength of the basalt scale daub is more determined by the mechanical strength of resin, and the proportion of each raw material is changed microscopically, so that the basalt scales and SiO are subjected to change₂The particles and the mica powder are distributed in different microscopic forms, and the matching relationship between the raw materials is changed, so that the mechanical property of the final product is reduced. After the dosage of the basalt scales is increased and the content of the basalt scales is too much (more than 5Kg), a matrix phase (resin) and a reinforcing phase (the basalt scales and SiO) are changed₂Particles and mica powder) to make the basalt flakes and SiO₂Intercordination between particles, reinforcing phases (basalt scales and SiO)₂Particles) and resin, and the mechanical strength exhibited by the final product decreases. Therefore, in comparative example 4, although the amount of basalt scales added was more than that in example 3, the mechanical properties of the prepared basalt scale cement were relatively low, and particularly, the bending strength and impact strength of the product in comparative example 4 were greatly changed.

Data for comparative example 3, examples 7-8 and comparative examples 5-6, which resultsThe results show that when the filler is SiO₂When the mixture of the particles and the carbon black is used, the dosage ratio of the particles and the carbon black has influence on the product performance of the finally prepared basalt scale cement, and when SiO is used, the product performance of the finally prepared basalt scale cement is influenced₂The mass ratio of the particles to the carbon black is 1.5: the basalt scale daub prepared in the step 1 has good mechanical property, and the tensile strength, the bending strength and the impact strength of the product are 26.7MPa, 49.0MPa and 0.24MPa respectively. And it is shown by the results of comparative examples 5 to 6 that when SiO is contained in the filler₂When the using amount of the particles is more, the bending strength of the final basalt scale daub is reduced: SiO 2₂The particle size of the particles is large, and in the process of adding the particles into raw materials to prepare products, micro pores generated among the particles are large, so that the mechanical property of the products is influenced, especially the bending strength of the products.

In the examples 9 to 11, mica powder, which is the most excellent material in mechanical properties, is added to the filler, so that the properties of the final product obtained by the preparation are excellent. When SiO is present₂The mass ratio of the particles to the carbon black to the mica powder is 1.5: 1: 3, the product performance of the prepared basalt scale daub is optimal. The mica powder with smaller granularity fills up SiO with larger granularity in the microcosmic aspect₂Gaps between the particles and the basalt flakes further promote the adhesion between inorganic raw materials (mica powder) and organic raw materials (bisphenol A type unsaturated polyester resin, p-hydroxyphenylsulfonic acid, gamma-glycidoxypropyltrimethoxysilane and ethylenebisstearamide), and meanwhile, the good elasticity and toughness of the mica powder further enhance the bending strength of the final product.

Examples 11-13 analysis compares three additives: the influence of the amount of p-hydroxybenzene sulfonic acid, gamma-glycidoxypropyltrimethoxysilane and ethylenebisstearamide on the properties of the final product is determined when the mass ratio of p-hydroxybenzene sulfonic acid, gamma-glycidoxypropyltrimethoxysilane and ethylenebisstearamide is 1.5: 1: and 2.25, the mechanical property of the prepared basalt scale daub is optimal. Also, as seen from the results of comparative examples 7-8, the absence of either gamma-glycidoxypropyltrimethoxysilane or ethylenebisstearamide had an effect on the final product properties: the tensile strength and the bending strength of the material are obviously reduced. The data of comparative example 9 shows that, when two raw materials are used for preparing the flake daub product, the mechanical properties of the flake daub prepared from the glass flake are relatively poor compared with those of the basalt flake daub. The protocol in example 11 of the invention is therefore the most preferred protocol for the preparation of the invention.

The acid and alkali corrosion resistance results in Table 3 show that the cement prepared according to the different embodiments of the present invention has 10% H₂SO₄After being treated for 1 month at the temperature of middle and 50 ℃, the weight change range of the basalt scale daub is as follows: -0.031% to-0.023%; after being treated for 1 month under the conditions of 10 percent NaOH and 50 ℃, the weight change range of the basalt scale daub is as follows: -0.023% to-0.014%. The daub prepared in different comparative examples is 10% H₂SO₄After being treated for 1 month at the temperature of middle and 50 ℃, the weight change range of the basalt scale daub is as follows: -0.049% to-0.029%; after being treated for 1 month under the conditions of 10 percent NaOH and 50 ℃, the weight change range of the basalt scale daub is as follows: -0.041% to-0.017%.

The basalt flake cement obtained in example 13 was at 10% H₂SO₄After being treated for 1 month at the temperature of 50 ℃ and medium, the weight change of the basalt scale daub is-0.023%; the resulting glass flake cement of comparative example 9 was at 10% H₂SO₄After 1 month of treatment at the temperature of middle and 50 ℃, the weight change of the glass flake daub is-0.049%; the result shows that the acid corrosion resistance of the basalt scale daub is obviously superior to that of the glass scale daub. After the basalt scale cement obtained in example 13 was treated with 10% NaOH at 50 ℃ for 1 month, the weight change of the basalt scale cement was-0.014%; the resulting glass flake cement in the comparative example was at 10% H₂SO₄After 1 month of treatment at the temperature of middle and 50 ℃, the weight change of the glass flake daub is-0.041 percent; the result shows that the alkali corrosion resistance of the basalt scale daub is obviously superior to that of the glass scale daub.

The basalt scale daub is prepared by the scheme of the embodiment 1-4, and other performance parameters of the basalt scale daub are detected, which are shown in table 4.

Table 4 other performance parameters of the basalt flake cement of examples 1-4

Item	Example 1	Example 2	Example 3	Example 4
					Tensile strength/MPa	25.4	25.5	26.4	26.1
Tensile modulus/MPa	8869	8812	8712	8769
					Elongation at break/%	0.26	0.24	0.28	0.26
Flexural Strength/MPa	49.7	49.2	48.8	48.6
					Flexural modulus/MPa	9201	9219	9501	9288
Compressive strength/MPa	52.0	54.3	53.9	55.7
					Impact strength/MPa	0.22	0.22	0.20	0.24
Barkel hardness	44	42	39	41

Wherein, the compression performance test is carried out according to the regulations of HG/T3797-2005, the compression performance test sample is carried out according to the relevant regulations of GB/T1448-2005, the thickness is 10mm, the width is 10mm, and the height is 30 mm. The detection standard of the Barkel hardness is GB/T3854-2005.

The tensile strength, the tensile modulus and the elongation at break are measured according to the relevant regulations of GB/T1447-.

The basalt scale cement prepared in example 13 was subjected to acid and alkali corrosion resistance measurement under different conditions, and the results are shown in table 5.

Table 5 acid and alkali corrosion resistance of basalt flake cement prepared in example 13

As shown in Table 5, the basalt scale daub prepared by the invention is easy to be corroded by the nitric acid solution compared with sulfuric acid, hydrochloric acid and nitric acid solution with the same concentration at the same temperature, wherein the corrosion of the sulfuric acid solution to the basalt scale daub is minimum, namely the performance of resisting the corrosion of sulfuric acid of the basalt scale daub is better. When the concentration of the same acid solution or alkali solution is higher, the acid/alkali corrosion resistance of the basalt scale daub is weakened; the higher the temperature is, the acid/alkali corrosion resistance of the basalt scale daub is relatively weakened.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The corrosion-resistant basalt scale daub is characterized by being prepared from the following raw materials in parts by weight:

16-18 parts of resin,

4-6 parts of basalt flakes,

2-3 parts of a filler,

3-4 parts of an additive;

2. The corrosion-resistant basalt scale mastic of claim 1, wherein the SiO is₂The mass ratio of the particles to the carbon black is 1-2: 1.

3. the corrosion-resistant basalt scale mastic as recited in claim 2, wherein the filler further comprises mica powder, the SiO being₂The mass ratio of the particles to the mica powder is 0.5-1.5: 2.

4. the corrosion-resistant basalt scale mastic as recited in claim 3, wherein the mica powder has a particle size of not greater than 2 μm, and the SiO is₂The particle size is 20-25 um.

5. The corrosion-resistant basalt scale daub according to claim 1, wherein the thickness of the basalt scale is 2 to 4um, and the particle size is 170 to 300 um.

6. The corrosion-resistant basalt scale mastic of claim 1, wherein the setting speed regulator is p-hydroxybenzene sulfonic acid, the silane surface treatment agent is γ -glycidoxypropyltrimethoxysilane, and the viscosity regulator is ethylenebisstearamide; the mass ratio of the p-hydroxybenzene sulfonic acid to the gamma-glycidyl ether oxypropyl trimethoxy silane to the ethylene bis-stearic acid amide is 1-2: 1: 1.5-3.

7. The corrosion-resistant basalt scale mastic as recited in claim 1, wherein the resin is a bisphenol a type unsaturated polyester resin or a trifunctional epoxy resin, the bisphenol a type unsaturated polyester resin has a viscosity of 0.4 to 0.6 Pa-s, an acid value of 14 to 36mg KOH/g, and a gel time of 12 to 25 min; the trifunctional epoxy resin has an epoxy equivalent of 0.96/100g and a viscosity of 1700 pas.

8. A method for preparing the corrosion-resistant basalt scale cement of any of claims 1 to 7, comprising the steps of:

s4: standing for 1.5-2.5 hours in a sealed state.

9. The method for preparing the corrosion-resistant basalt scale daub according to claim 8, wherein the preparation process of the basalt scale comprises the following steps: