CN112394164A - Method for testing alkali resistance of primer - Google Patents
Method for testing alkali resistance of primer Download PDFInfo
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- CN112394164A CN112394164A CN202011294575.0A CN202011294575A CN112394164A CN 112394164 A CN112394164 A CN 112394164A CN 202011294575 A CN202011294575 A CN 202011294575A CN 112394164 A CN112394164 A CN 112394164A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; viscous liquids; paints; inks
- G01N33/32—Paints; inks
Abstract
The invention provides a test method for the alkali resistance of a primer, which comprises the following steps: (1) sequentially coating mortar and primer on the bottom plate, and drying to obtain the bottom plate with the primer coating; (2) soaking the base plate with the primer coating obtained in the step (1) by using water, drying, and obtaining a result of the alkali-efflorescence resistance test of the primer through the alkali-efflorescence area of the base plate; the test method can simulate the actual situation, can accelerate the test speed, greatly shortens the test time of the alkali efflorescence resistance of the primer, has convenient operation and simple equipment in the whole process, and is suitable for being applied in various scenes.
Description
Technical Field
The invention belongs to the technical field of paint testing, and particularly relates to a method for testing the alkali resistance of a primer.
Background
The paint can be divided into priming paint, middle paint, finish paint, putty and the like according to the using level. Generally, when painting, firstly, putty is applied to a construction surface to form a base coat, the putty is polished and leveled by using sand paper after being dried, a primer is painted once, and a finish coat is painted after the primer is dried. If the alkali resistance of the primer is good, alkaline substances cannot penetrate into the surface of the finish paint, and the phenomenon of blooming (namely white alkaline substances exuded from the wall) cannot be seen on the wall coated with the paint; if the base paint has poor efforescence resistance, a severe blooming phenomenon of the finish paint film can be seen on the wall body coated with the paint.
At present, in the primer standard JG/T210-2018 for the architectural coating, a test board is maintained for 7 days according to standard requirements for testing the alkali-efflorescence resistance of the primer, and then the test is carried out.
CN105334312A discloses a method for rapidly evaluating the performance of a primer, comprising the following steps: respectively brushing test primer on the surfaces of the asbestos cement board and the fiber reinforced cement medium-density flat plate, carrying out water permeability test, adhesive force test, saltpetering resistance test and salting-out resistance test on the asbestos cement board and the fiber reinforced cement medium-density flat plate, and if the water permeability, the adhesive force, the saltpetering resistance of the inner wall primer or the saltpetering resistance and the salting-out resistance of the outer wall primer are qualified, judging that the evaluation is qualified; if the water permeability, the adhesive force, the alkali resistance of the inner wall primer or the alkali resistance and the salting-out resistance of the outer wall primer are unqualified, the evaluation is unqualified. CN105527411A discloses a test method for testing the alkali resistance of a primer, comprising the following steps: the method comprises the following steps: and (3) batch putty coating: scraping the putty layer in batches, and performing the next step after the putty layer on the wall surface or the test board is dried; step two: coating sodium hydroxide: coating a sodium hydroxide solution, and carrying out the next step after the sodium hydroxide solution on the wall surface or the test board is dried; step three: coating a primer to be detected: coating the primer to be detected on the wall surface or the test board, and performing the next step after the primer to be detected on the wall surface or the test board is dried; step four: spraying paint surfaces: showering the surface of the wall surface or the test board until the putty layer is thoroughly wetted, and carrying out the next step after the wall surface or the test board is dried; step five: and (3) measuring results: the water spraying times and the paint surface damage rate are used as the detection result of the primer to be detected, and the method can be applied to the wall surface which is brushed, simulate the alkali amount which is penetrated out of the wall body for a long time, and accelerate the alkali efflorescence resistance of the primer in practical application. CN107966547A discloses a method for detecting the alkali-efflorescence resistance of a primer, which comprises the following specific detection steps: s1: preparing before detection; performing putty pretreatment on the surface of a wall to be detected, performing surface stain treatment and light polishing on the wall, increasing the bonding strength between putty paste and the wall, scraping the putty paste on the surface of the treated wall, wherein the thickness of the putty paste is 2.0-2.2 mm, airing the wall after the putty paste is scraped, after airing, polishing the surface of the putty paste, increasing the flatness of a putty paste layer, wherein the thickness of the putty paste layer after polishing is 1.5-1.8 mm, and blowing off dust on the surface of the putty paste layer through air blowing equipment; s2: sampling a material; s3: and comparison and conclusion are obtained, and the method improves the accuracy of the test by taking a comparison mode as the basis of the experiment. Although the three methods can effectively evaluate the alkali resistance of the primer, the accuracy of the test result is still to be improved, and the three methods still have the defects of troublesome operation steps, overlong operation time and the like.
Therefore, the method for testing the alkali resistance of the primer is convenient to operate, simple in equipment, short in time consumption and high in test result accuracy, and has important use value.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a primer efflorescence resistance test method, which comprises the steps of coating mortar and a primer on a base plate in sequence, drying, soaking the base plate with a primer coating by water, drying, and finally obtaining an efflorescence resistance test result of the primer through the efflorescence area of the base plate; the whole testing process has the advantages of convenience in operation, simple equipment, short time consumption and high accuracy, and has high use value.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a test method for the alkali resistance of a primer, which comprises the following steps:
(1) sequentially coating mortar and primer on the bottom plate, and drying to obtain the bottom plate with the primer coating;
(2) and (2) soaking the base plate with the primer coating obtained in the step (1) with water, drying, and obtaining the alkali-efflorescence resistance test result of the primer through the alkali-efflorescence area of the base plate.
The primer efflorescence resistance test method provided by the invention comprises the steps of firstly coating mortar and primer on a bottom plate, drying to obtain the bottom plate with the primer coating, and not only can simulate an actual substrate, but also can accelerate the test speed; and then soaking the base plate with the primer coating by using water, and observing the whiskering area on the base plate after drying to obtain a whiskering resistance test result of the primer.
In the test method provided by the invention, the saltpetering area is less than 10% of the total area of the primer coating, which represents that the saltpetering resistance of the primer is qualified; the smaller the base bleed area, the stronger the base bleed resistance of the primer.
Preferably, the volume water absorption of the base plate in the step (1) is 6-10%, such as 6.2%, 6.4%, 6.6%, 6.8%, 7%, 7.2%, 7.4%, 7.6%, 7.8%, 8%, 8.4%, 8.8%, 9%, 9.2%, 9.4% or 9.8%, and the specific values therebetween are limited by space and for the sake of brevity, and the invention is not exhaustive of the specific values included in the range.
Preferably, the pH of the mortar coated base plate is greater than 12, such as 12.2, 12.4, 12.6, 12.8 or 13, and the like.
The base plate used in the invention can be an inorganic modified polystyrene base plate, the modified polystyrene base plate adopts a vacuum adsorption mode to fill inorganic flame-retardant gel materials into the base plate, and the plate contains more inorganic materials and has strong self water absorption.
Preferably, the coating amount of the mortar in the step (1) on the base plate is 0.5-3 kg/m2For example 0.7kg/m2、0.9kg/m2、1.1kg/m2、1.3kg/m2、1.5kg/m2、1.7kg/m2、1.9kg/m2、2.1kg/m2、2.3kg/m2、2.5kg/m2、2.7kg/m2Or 2.9kg/m2And the specific values between the foregoing, are not intended to be exhaustive or to limit the invention to the precise values encompassed within the scope, for reasons of brevity and clarity.
Preferably, the coating amount of the primer in the step (1) on the base plate is 0.1-0.2 kg/m2For example 0.11kg/m2、0.12kg/m2、0.13kg/m2、0.14kg/m2、0.15kg/m2、0.16kg/m2、0.17kg/m2、0.18kg/m2Or 0.19kg/m2And the specific values between the foregoing, are not intended to be exhaustive or to limit the invention to the precise values encompassed within the scope, for reasons of brevity and clarity.
Preferably, the drying time in step (1) is 10-28 h, such as 11h, 12h, 13h, 14h, 15h, 16h, 17h, 18h, 19h, 20h, 21h, 22h, 23h, 24h, 25h, 26h or 27h, and the specific values therebetween, which are not limited by the space and for the sake of brevity, the present invention does not exhaustive list the specific values included in the range, preferably 24-28 h.
Preferably, the drying temperature in step (1) is 20-30 ℃, for example 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃, 26 ℃, 27 ℃, 28 ℃ or 29 ℃, and the specific values therebetween are limited by space and for the sake of brevity, and the invention is not exhaustive of the specific values included in the range, and preferably 24-28 h.
Preferably, the method for wetting with water in step (2) is wetting with water conducted by a wire.
As the preferable technical scheme of the invention, the method of wetting with water in the step (2) is carried out by adopting linear water conduction, so that the mode that the actual rainwater enters the coating from outside to inside can be simulated, the mode is different from the mode that the water permeates from inside to outside, the accuracy of the test result of the alkali-flooding resistance of the primer is improved, and the method is more consistent with the actual situation.
Preferably, the length of the line is 20-30 cm, such as 21cm, 22cm, 23cm, 24cm, 25cm, 26cm, 27cm, 28cm or 29cm, and the specific values therebetween are limited in space and for the sake of brevity and are not exhaustive of the invention to include the specific values within the stated ranges.
Preferably, the diameter of the wire is 2-10 mm, such as 3mm, 4mm, 5mm, 6mm, 7mm, 8mm or 9mm, and the specific values therebetween are limited by the space and for the sake of brevity, and the invention is not intended to be exhaustive of the specific values included in the ranges.
Preferably, the wire is a wetted wire.
Preferably, the conduction amount of the conduction water is 0.8-2L, such as 0.9L, 1L, 1.1L, 1.2L, 1.3L, 1.4L, 1.5L, 1.6L, 1.7L, 1.8L or 1.9L, and the specific point values between the above point values are limited to space and for the sake of brevity, the present invention does not exhaustively enumerate the specific point values included in the range, preferably 1-1.5L.
Preferably, the drying time in step (2) is 10-28 h, such as 11h, 12h, 13h, 14h, 15h, 16h, 17h, 18h, 19h, 20h, 21h, 22h, 23h, 24h, 25h, 26h or 27h, and the specific values therebetween, which are not limited by the space and for the sake of brevity, the present invention does not exhaustive list the specific values included in the range, preferably 24-28 h.
Preferably, the drying temperature in step (2) is 20-30 ℃, for example, 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃, 26 ℃, 27 ℃, 28 ℃ or 29 ℃, and the specific values therebetween are limited by space and for the sake of brevity, and the invention is not exhaustive of the specific values included in the range.
As a preferred technical scheme, the testing method comprises the following steps:
(1) on the bottom plate according to the weight of 0.5-3 kg/m2Coating mortar in a coating amount of 0.1 to 0.2kg/m2Coating the primer in the coating amount, and drying for 10-28 h to obtain a bottom plate with a primer coating;
(2) and (2) conducting 0.8-2L of water to the base plate with the primer coating obtained in the step (1) through a wetting line to wet the base plate, and observing the base plate efflorescence area after drying for 10-28 h to obtain the anti-efflorescence test result of the primer.
Compared with the prior art, the invention has the following beneficial effects:
the primer efflorescence resistance test method comprises the steps of sequentially coating mortar and a primer on a base plate, drying, soaking the base plate with a dried primer coating with water, and observing the efflorescence area of the base plate after drying to obtain an efflorescence resistance test result of the primer; the method can simulate an actual substrate and accelerate the test speed, greatly shortens the test time of the alkali efflorescence resistance of the primer compared with the test method in the prior art, has the advantages of convenient operation, simple equipment and high accuracy, and is suitable for being applied in various scenes.
Drawings
Fig. 1 is a diagram of a water conduction device and a conduction process provided in example 1;
FIG. 2 is a graph showing the results of the saltpetering resistance test obtained in example 1;
FIG. 3 is a graph showing the results of the saltpetering resistance test obtained in example 2;
FIG. 4 is a graph showing the results of the saltpetering resistance test obtained in example 3;
FIG. 5 is a graph showing the results of the saltpetering resistance test obtained in example 4;
FIG. 6 is a graph showing the results of the saltpetering resistance test obtained in example 5;
FIG. 7 is a graph showing the results of the saltpetering resistance test obtained in example 6;
FIG. 8 is a graph showing the results of the saltpetering resistance test obtained in example 7;
wherein, the 1-line position, the 2-pantone position.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
A test method for the alkali resistance of a primer specifically comprises the following steps:
(1) on an FS-A grade insulation board (Fuste, FS-A) with the volume water absorption rate of 6 percent according to the weight of 2kg/m2Coating mortar (BS212 one-component finishing) to obtain mortar-coatedThe base plate (pH value of the base plate coated with mortar is 12), dried at 25 ℃ for 10h according to the coating amount of 0.15kg/m2Coating a primer (Fuste and primer 1#), and drying at 25 ℃ for 19h to obtain a bottom plate with a primer coating;
(2) putting one end of a soaked cotton thread with the length of 25cm into a container filled with 1.4L of water (the end of the cotton thread is immersed in the water), fixing the other end of the cotton thread at one side of the base plate with the coating obtained in the step (1), gradually conducting the water in the container onto the base plate through the cotton thread, and showing a conducting device and a conducting process in a figure 1, wherein 1 represents the position of the thread, and drying for 19h at 25 ℃ after the conduction is finished to obtain a result of the anti-efflorescence test of the primer.
The results of the alkali-efflorescence resistance test obtained by the test method provided in this example are shown in fig. 2, wherein 2 represents an alkali-efflorescence site; the alkali-efflorescence-resistant strength of the primer is judged according to the alkali-efflorescence area, the condition that the alkali-efflorescence area ratio in the whole coating is less than 10 percent is met, and the alkali-efflorescence-resistant strength of the primer is further judged; as can be seen from fig. 2, the outline of the whiskering position in the primer coating obtained by the test method provided by the embodiment is clear, whiskering is obvious, the ratio of the whiskering area to the whole coating area can be clearly calculated, the whiskering resistance of the primer can be effectively judged, and the whiskering resistance of the primer is consistent with the whiskering resistance test result of the primer in JG/T210-2018 primer for internal and external walls of a building, which indicates that the whiskering resistance test result provided by the embodiment is accurate.
Example 2
A test method for the alkali resistance of a primer specifically comprises the following steps:
(1) in an FS-A grade insulation board (Fuste, FS-A) with the volume water absorption rate of 6 percent, according to the proportion of 2kg/m2Coating BS212 one-component plastering mortar to obtain a mortar-coated base plate (pH value of the mortar-coated base plate is 12), drying at 25 ℃ for 10h, and coating the mortar-coated base plate with 0.1kg/m2Coating primer (Fuste and primer 1#) in the coating amount, and drying at 25 ℃ for 10 hours to obtain a bottom plate with a primer coating;
(2) and (3) putting one end of the soaked cotton thread with the length of 20cm into a container filled with 0.8L of water (namely, one end of the cotton thread is immersed into the water), fixing the other end of the cotton thread on one side of the base plate with the coating obtained in the step (1), gradually conducting the water in the container onto the base plate through the cotton thread, and drying for 10 hours at 25 ℃ after the conduction is finished to obtain the anti-efflorescence test result of the primer.
The results of the alkali-efflorescence resistance test by the test method provided in this example are shown in fig. 3, in which 2 represents an alkali-efflorescence site; the alkali-efflorescence-resistant strength of the primer is judged according to the alkali-efflorescence area, the condition that the alkali-efflorescence area ratio in the whole coating is less than 10 percent is met, and the alkali-efflorescence-resistant strength of the primer is further judged; as can be seen from fig. 3, the outline of the whiskering-resistant portion obtained by the testing method provided by the embodiment is clear, whiskering is obvious, the ratio of the whiskering-resistant area to the whole coating area can be clearly calculated, the whiskering-resistant strength of the primer can be effectively judged, and the whiskering-resistant strength is consistent with a whiskering-resistant testing result of the primer in JG/T210-2018 primer for internal and external walls of a building, which indicates that the whiskering-resistant testing result provided by the embodiment is accurate.
Example 3
A test method for the alkali resistance of a primer specifically comprises the following steps:
(1) on an FS-A grade insulation board (Fuste, FS-A) with the volume water absorption rate of 6 percent according to the weight of 2kg/m2Coating the single-component mortar of BS212 to obtain a mortar-coated base plate (pH value of the mortar-coated base plate is 12), and coating the mortar-coated base plate with the mortar-coated base plate at a rate of 0.2kg/m2Coating primer (Fuste, primer 2#) in the coating amount, and drying for 28h at 25 ℃ to obtain a bottom plate with a primer coating;
(2) and (3) putting one end of the soaked cotton thread with the length of 30cm into a container filled with 3L of water (namely, one end of the cotton thread is immersed into the water), fixing the other end of the cotton thread on one side of the base plate with the coating obtained in the step (1), gradually conducting the water in the container onto the base plate through the cotton thread, and drying for 28 hours at 25 ℃ after the conduction is finished to obtain the anti-efflorescence test result of the primer.
The results of the test for saltpetering resistance obtained by the test method provided in this example are shown in FIG. 4, in which 2 represents a saltpetering site; the alkali resistance of the primer is judged according to the alkali efflorescence area, the alkali efflorescence area ratio in the whole coating is less than 10 percent, and the alkali resistance of the primer is judged; as can be seen from fig. 4, the outline of the whiskering-resistant portion obtained by the testing method provided by the embodiment is clear, whiskering is obvious, the ratio of the whiskering-resistant area to the whole coating area can be clearly calculated, the whiskering-resistant strength of the primer can be effectively judged, and the whiskering-resistant strength is consistent with a whiskering-resistant testing result of the primer in JG/T210-2018 primer for internal and external walls of a building, which indicates that the whiskering-resistant testing result provided by the embodiment is accurate.
Example 4
A primer bleeding resistance test method, which is different from example 1 only in that the FS-A grade insulation board used in step (1) is replaced with an extruded board (XPS board) having A volume water absorption of 0.1%, and other components, amounts and steps are the same as those of example 1.
The results of the test for saltpetering resistance obtained by the test method provided in this example are shown in FIG. 5, in which 2 represents a saltpetering site; as can be seen from fig. 5, the outline of the whiskering position on the coating obtained by the test method provided in this embodiment is clear, but whiskering is not obvious, and the whiskering area in the whole coating area can be calculated, but the consistency of the test result on the whiskering resistance of the primer in JG/T210-2018 "primer for interior and exterior walls of buildings" is not good, which indicates that although the whiskering resistance test provided in this embodiment can test the whiskering resistance of the primer, the test result is not easy to observe and has poor accuracy compared with example 1.
Example 5
A test method for the alkali resistance of a primer specifically comprises the following steps:
(1) on an FS-A grade insulation board (Fuste, FS-A) with the volume water absorption rate of 6 percent according to the weight of 2kg/m2Coating mortar (BS212 one-component finishing) to obtain a mortar-coated base plate (pH value of the mortar-coated base plate is 12), drying at 25 ℃ for 10h, and coating in an amount of 0.15kg/m2Coating a primer (Fuste, primer 2#), and drying at 25 ℃ for 19h to obtain a bottom plate with a primer coating;
(2) and (3) placing the base plate with the coating obtained in the step (1) in a container filled with water, so that the coating on the base plate is completely soaked, and drying at (temperature) DEG C for 19h to obtain the anti-efflorescence test result of the primer.
The results of the test for saltpetering resistance obtained by the test method provided in this example are shown in FIG. 6, in which 2 represents a saltpetering site; as can be seen from fig. 6, the coating obtained by the test method provided in this example has very significant efflorescence, but the position profile is not very clear, the proportion of efflorescence area in the whole coating cannot be accurately calculated, and only the anti-efflorescence condition of the primer can be qualitatively observed.
Example 6
A test method for the alkali resistance of a primer specifically comprises the following steps:
(1) on an FS-A grade insulation board (Fuste, FS-A) with the volume water absorption rate of 6 percent according to the weight of 2kg/m2Coating mortar (BS212 one-component finishing) to obtain a mortar-coated base plate (pH value of the mortar-coated base plate is 12), drying at 25 ℃ for 10h, and coating in an amount of 0.15kg/m2Coating a primer (Fuste, primer 2#), and drying at 25 ℃ for 19h to obtain a bottom plate with a primer coating;
(2) and (3) directly spraying water on the base plate with the coating obtained in the step (1) to completely wet the coating on the base plate, and drying at 25 ℃ for 19 hours to obtain the anti-efflorescence test result of the primer.
The results of the alkali-efflorescence resistance test by the test method provided in this example are shown in fig. 7, in which 2 represents an alkali-efflorescence site; as can be seen from fig. 7, the coating obtained by the test method provided in this example has very obvious whiskering, but the position profile is not very clear, the ratio of whiskering area to the whole coating cannot be accurately calculated, and only the whiskering resistance of the primer can be qualitatively observed.
Example 7
A primer efflorescence resistance test method is different from the example 1 only in that the FS-A grade insulation board used in the step (1) is replaced by A glass board, and other components, using amounts and steps are the same as those of the example 1.
The results of the alkali-efflorescence resistance test by the test method provided in this comparative example are shown in fig. 8, in which 2 represents an alkali-efflorescence site; as can be seen from fig. 8, the outline of the whiskering part obtained by the test method provided in this embodiment is clear, whiskering is not obvious, and the whiskering area can be calculated in the whole specific area of the coating, but the test result of whiskering resistance of the primer is not consistent well with that of JG/T210-2018 "primer for interior and exterior walls of a building", which indicates that although the whiskering resistance test provided in this embodiment can test whiskering resistance of the primer, the test result is not easy to observe and has poor accuracy compared with example 1.
Comparative example 1
A test method for the alkali efflorescence resistance of a primer is carried out according to the alkali efflorescence resistance test of the primer in JG/T210-2018 primer for building interior and exterior walls, the alkali efflorescence resistance test result of the primer can be accurately obtained, but the time is as long as 72 hours, the whole test period of the test method provided by the invention is about 20-56 hours, and the test time is shortened by 28-260%.
The applicant states that the present invention is illustrated by the above examples as a process method of testing the anti-efflorescence performance of the primer, but the present invention is not limited to the above process steps, i.e., it does not mean that the present invention must rely on the above process steps to be carried out. It will be apparent to those skilled in the art that any modification of the present invention, equivalent substitutions of selected materials and additions of auxiliary components, selection of specific modes and the like, which are within the scope and disclosure of the present invention, are contemplated by the present invention.
Claims (10)
1. A test method for the alkali-efflorescence resistance of a primer is characterized by comprising the following steps:
(1) sequentially coating mortar and primer on the bottom plate, and drying to obtain the bottom plate with the primer coating;
(2) and (2) soaking the base plate with the primer coating obtained in the step (1) with water, drying, and obtaining the alkali-efflorescence resistance test result of the primer through the alkali-efflorescence area of the base plate.
2. The test method according to claim 1, wherein the volume water absorption rate of the base plate in the step (1) is 6-10%;
preferably, the pH of the mortar coated back plate is greater than 12.
3. The test method according to claim 1 or 2, wherein the coating amount of the mortar of the step (1) on the base plate is 0.5 to 3kg/m2。
4. The test method according to any one of claims 1 to 3, wherein the primer of step (1) is applied to the substrate in an amount of 0.1 to 0.2kg/m2。
5. The test method according to any one of claims 1 to 4, wherein the drying time in step (1) is 10 to 28 hours, preferably 24 to 28 hours;
preferably, the drying temperature in the step (1) is 20-30 ℃.
6. The test method according to any one of claims 1 to 5, wherein the method for wetting with water in step (2) is wetting with water conducted through a wire.
7. The test method according to claim 6, wherein the length of the wire is 20 to 30 cm;
preferably, the diameter of the wire is 2-10 mm;
preferably, the wire is a wetted wire.
8. The test method according to claim 6 or 7, wherein the amount of the conductive water is 0.8-2L, preferably 1-1.5L.
9. The test method according to any one of claims 1 to 8, wherein the drying time in step (2) is 10 to 28 hours, preferably 24 to 28 hours;
preferably, the drying temperature in the step (2) is 20-30 ℃.
10. The test method according to any one of claims 1 to 9, characterized in that it comprises the steps of:
(1) on the bottom plate according to the weight of 0.5-3 kg/m2Coating mortar in a coating amount of 0.1 to 0.2kg/m2Coating the base paint in the coating amount, and drying at the temperature of 20-30 ℃ for 10-28 h to obtain the base plate with the base paint coating;
(2) and (2) conducting 0.8-2L of water to the base plate with the primer coating obtained in the step (1) through a wetting line to wet the base plate, drying at 20-30 ℃ for 10-28 h, and observing the base plate efflorescence area to obtain an anti-efflorescence test result of the primer.
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