CN110987575A - Gasification type antirust performance test method - Google Patents
Gasification type antirust performance test method Download PDFInfo
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- CN110987575A CN110987575A CN201911143748.6A CN201911143748A CN110987575A CN 110987575 A CN110987575 A CN 110987575A CN 201911143748 A CN201911143748 A CN 201911143748A CN 110987575 A CN110987575 A CN 110987575A
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- G01N1/00—Sampling; Preparing specimens for investigation
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- G01N1/32—Polishing; Etching
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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Abstract
The invention discloses a gasification type antirust performance testing method, and relates to the technical field of antirust performance detection. The technical key points are as follows: the method comprises the following steps: (1) cleaning a test metal by using a cleaning agent, washing the test metal by using distilled water, drying the test metal by using an oven, polishing the surface of the test metal, cleaning the test metal by using alcohol, naturally drying the test metal in air, and placing the test metal in a drying box for later use; (2) adding 30mL of distilled water into a quart glass bottle, putting a grid table into the bottle, putting a ring-shaped sample, taking out a test metal from a drying box, and putting the test metal on the grid table in the middle of the ring-shaped sample; (3) and (3) covering and sealing the test bottle, standing for 2 hours at room temperature, then standing for 1 hour in an oven at 49 ℃, taking out the test bottle, standing for 30 minutes at room temperature, taking out the test metal from the test bottle, and inspecting the proportion and percentage of rust to obtain the gasification antirust performance of the sample. The test method has the advantages of simple and convenient operation, short time span and accurate test result.
Description
Technical Field
The invention relates to the technical field of antirust performance detection, in particular to a gasification type antirust performance testing method.
Background
The antirust film is a short name of a gas-phase antirust plastic film (VCI anti rust film), and is a new-generation innovative high-tech product based on the combination of a high polymer material and the VCI gas-phase antirust technology development. After the rustproof metal object is packaged and sealed by a rustproof film (which can also be made into various plastic bag shapes), VCI contained in the film body begins to sublimate and volatilize rustproof gas factors, and the gas factors are diffused and permeated to the surface of the rustproof object and adsorbed on the surface of the rustproof object to form a dense protection film layer with a single molecular thickness, so that various factors inducing rust are isolated from contacting the surface of the rustproof object, and the generation of rust is effectively prevented.
The anti-rust paper is a short name of gas-phase anti-rust paper series, and is prepared by processing and refining high-quality anti-rust base paper and a special high-efficiency compound gas-phase corrosion inhibitor (VCI LIQUID) through a special process. In the sealed packaging space, VCI contained in the paper body begins to sublimate at normal temperature and normal pressure to volatilize rust-proof gas factors, and the VCI diffuses and permeates to the surface of a rust-proof object and is adsorbed on the surface of the rust-proof object to form a monomolecular dense protective film layer, so that the aim of rust prevention is fulfilled.
After the existing enterprises produce the anti-rust films and anti-rust papers with different specifications, gasification type and contact type anti-rust performance tests are needed to be carried out on the anti-rust films and the anti-rust papers so as to detect whether the anti-rust films and the anti-rust papers have qualified anti-rust performance or not. In general, the national standard GB/T19532-2018 is adopted for detecting the antirust performance of the product, a constant-temperature and constant-humidity salt spray box is adopted for simulating an environment easy to rust, the process is complicated, and the detection time span is large.
Therefore, a new solution is needed to solve the above problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a gasification type antirust performance test method which has the advantages of simplicity in operation, short time span and accurate detection result.
In order to achieve the first purpose, the invention provides the following technical scheme:
a gasification type antirust performance test method comprises the following steps:
a. cleaning a test metal by using a cleaning agent, washing the test metal by using distilled water, drying the test metal by using an oven, polishing the surface of the test metal, cleaning the test metal by using alcohol, naturally drying the test metal in air, and placing the test metal in a drying box for later use;
b. adding 30mL of distilled water into a quart glass bottle, putting a grid table into the bottle, putting a ring-shaped sample, taking out a test metal from a drying box, and putting the test metal on the grid table in the middle of the ring-shaped sample;
c. and (3) covering and sealing the test bottle, standing for 2 hours at room temperature, then standing for 1 hour in an oven at 49 ℃, taking out the test bottle, standing for 30 minutes at room temperature, taking out the test metal from the test bottle, and inspecting the proportion and percentage of rust to obtain the gasification antirust performance of the sample.
By adopting the technical scheme, the testing metal is treated by adopting the cleaning agent and the distilled water, dirt, grease and the like on the surface of the testing metal are washed away, and then the moisture on the surface of the testing metal is dried by using the oven, so that the influence of the moisture on the oxidation of the testing metal is avoided; and polishing the surface of the test metal to remove an oxide layer on the surface of the test metal, so as to avoid the influence of the passivated oxide layer on the test, and finally washing off the polished oxide by using alcohol. The pretreatment work ensures that the surface of the tested metal is clean and dry, so that the accuracy of the test result is ensured.
The test metal is placed on the grid table, the grid table is made of organic glass, the test metal cannot be affected by rusting, and the grid table is arranged in a grid shape, so that the contact area with the test metal is reduced, and normal rising and settlement of water vapor are facilitated. The circle-shaped sample is an anti-rust film or anti-rust paper to be tested for anti-rust performance, the circle-shaped sample is rolled into a circle shape and is vertically placed on the grid table, so that an anti-rust area is defined, and water vapor generated by water below the grid table can pass through the upper part and the lower part of the circle-shaped sample to form a circulating humid environment. The total time consumption is 3.5h, the antirust performance of the sample can be obtained within half a day, and the test method is simple and convenient to operate, short in time span and accurate in test result.
More preferably, the metal is 45# steel with a thickness of 12.7mm and a diameter of 25.4 mm.
By adopting the technical scheme, the 45# steel is metal containing a certain content of carbon, has excellent cutting processability and high strength, and is suitable for carrying out an antirust performance test.
More preferably, the metal is polished by using a 240# aluminum oxide cloth.
By adopting the technical scheme, the 240# aluminum oxide cloth, namely the 240# sand paper, has large particles and is easy to polish, and the oxide layer on the surface of the tested metal can be removed.
More preferably, the sample is a rust preventive film or a rust preventive paper.
By adopting the technical scheme, the anti-rust film and the anti-rust paper are respectively a gas-phase anti-rust plastic film and a gas-phase anti-rust paper, the test metal is placed in an area surrounded by the anti-rust film or the anti-rust paper, VCI contained in the anti-rust film or the anti-rust paper begins to sublimate and volatilize anti-rust gas factors, the anti-rust gas factors are diffused and permeated to the surface of the test metal and adsorbed on the surface of the test metal to form a dense protection film layer with single molecule thickness, and various factors inducing rust are isolated from being in contact with the surface of an anti-rust object.
More preferably, the length of the sample is 178mm, and the width thereof is 63.5 mm.
By adopting the technical scheme, the sample with the length of 178mm and the width of 63.5mm is adopted, and after the sample is rolled up, the sample is highly adaptive to the height of a glass bottle and the diameter of a grid table, so that a good rust-proof area is enclosed, VCI rust-proof factors in the sample can be conveniently diffused and attached to the surface of a test metal, and the precision of a test result is improved.
Preferably, the grid table comprises an upper cylinder, a lower cylinder and a grid plate, the upper cylinder and the lower cylinder are fixed on two sides of the grid plate and are coaxially arranged, and the periphery of the ring-shaped sample is tightly attached to the inner wall of the upper cylinder.
Through adopting above-mentioned technical scheme, lower drum plays the effect that supports the grid plate and pull up the grid plate height, goes up the drum and plays the effect of encircleing the sample, and the grid plate plays and supports test metal side effect, and the setting can be dismantled to the net table, easily washs and pours distilled water into, convenient fixed sample.
More preferably, the upper cylinder is 25.4mm high, the lower cylinder is 76mm high, and the thickness of the grid plate is 3.2 mm.
Through adopting above-mentioned technical scheme, lower drum height 76mm, 30 mL's distilled water can not contact the grid plate, and the sample can just be lived in firm circle to the last drum that 25.4mm is high, and surface sample breaks away from or emptys, and grid plate thickness 3.2mm makes things convenient for steam to circulate about normal to guarantee the accuracy of test result.
In summary, compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, before testing, the testing metal is pretreated, and grease and an oxide layer on the surface of the testing metal are removed in the modes of cleaning by using a cleaning agent and distilled water, drying, polishing and alcohol cleaning, so that the accuracy of a testing result is ensured;
(2) after the test metal is placed in the glass bottle, the total time is consumed for 3.5 hours, the antirust performance of the test sample can be tested in half a day, and the test result is obtained, so that the operation is simple, and the time span is short;
(3) the invention adopts the grid table consisting of the upper cylinder, the grid plate and the lower cylinder to support the tested metal, thereby facilitating the fixation of the sample, enclosing a VCI rust-proof factor volatilization area and improving the accuracy of the test result.
Drawings
FIG. 1 is an overall view of the experimental device in example 1;
fig. 2 is a schematic view of the grid table of embodiment 1.
Reference numerals: 1. testing the metal; 2. a glass bottle; 3. a grid table; 301. an upper cylinder; 302. A lower cylinder; 303. a grid plate; 4. and (4) sampling.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example 1: a gasification type antirust performance test method comprises the following steps:
a. taking 45# steel with the thickness of 12.7mm and the diameter of 25.4mm as a test metal 1, cleaning the surface of the test metal 1 by using a vertical white detergent, washing the surface of the test metal 1 by using distilled water, drying the cleaned test metal by using an oven, polishing the surface of the test metal 1 by using 240# aluminum oxide cloth, cleaning the surface of the test metal 1 by using alcohol with the volume concentration of 85%, naturally drying the cleaned test metal 1 in air, and placing the dried test metal 1 in a drying oven for later use;
b. taking a quart glass bottle 2 with the thickness of 89mm by 165mm, adding 30mL of distilled water, placing a grid table 3 in the middle of the bottle, placing a ring-shaped sample 4, taking out a test metal 1 from a drying box, and placing the test metal on the grid table 3 in the middle of the ring-shaped sample;
c. and covering and sealing the test bottle by using a glass cover, placing the test bottle at room temperature for 2 hours, then placing the test bottle in an oven at 49 ℃ for 1 hour, taking out the test bottle, placing the test bottle at room temperature for 30 minutes, taking out the test metal 1 from the test bottle, and inspecting the proportion and percentage of rust to obtain the gasification antirust performance of the sample 4.
The grid table 3 in the step (2) comprises an upper cylinder 302301 with the height of 25.4mm, a lower cylinder with the height of 76mm, and a grid plate 303 with the thickness of 3.2mm, wherein the upper cylinder 302301 and the lower cylinder are fixed on two sides of the grid plate 303, the upper cylinder 302301 and the lower cylinder are coaxially arranged, the ring-shaped sample 4 is inserted into the upper cylinder 302301, the bottom of the sample 4 is abutted against the grid plate 303, the peripheral side of the sample 4 is tightly attached to the inner wall of the upper cylinder 302301, the test metal 1 is placed in the middle of the grid plate 303 and is not contacted with the sample 4, and the top of the sample 4 is not contacted with a glass cover.
In the experiment, 3 glass bottles 2 are used as a group, wherein 2 samples 4 are rust-proof films, and the other sample is a common PE sample.
Example 2: a gasification type antirust performance test method is different from the embodiment 1 in that 3 glass bottles 2 are adopted as a group in the embodiment, 2 samples 4 adopt antirust paper, and the other sample adopts a common PE sample.
Criterion of evaluation
The rusting condition of the test metal 1 can refer to a rusting ratio comparison table, so that the rusting ratio and the rusting percentage of the test metal 1 are obtained, and finally the rust resistance of the test sample 4 is obtained.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited only by the scope of the present invention
Rusting proportion comparison table
Corrosion Inhibition Rating Legend
The technical solutions belonging to the idea of the present invention are all within the protection scope of the present invention, limited to the above embodiments. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. A gasification type antirust performance test method is characterized by comprising the following steps:
a. cleaning the test metal (1) by using a cleaning agent, washing by using distilled water, drying by using an oven, polishing the surface of the test metal (1), cleaning by using alcohol, naturally drying in the air, and placing in a drying oven for later use;
b. adding 30mL of distilled water into a quart glass bottle (2), putting a grid table (3) into the bottle, putting a ring-shaped sample (4), taking out a test metal (1) from a drying box, and putting the test metal on the grid table (3) in the middle of the ring-shaped sample;
c. and (3) covering and sealing the test bottle, placing the test bottle at room temperature for 2 hours, then placing the test bottle in an oven at 49 ℃ for 1 hour, taking out the test bottle, placing the test bottle at room temperature for 30 minutes, taking out the test metal (1) from the test bottle, and inspecting the proportion and percentage of rust to obtain the gasification antirust performance of the sample (4).
2. The method for testing the gasification type antirust performance according to claim 1, wherein the metal is 45# steel with the thickness of 12.7mm and the diameter of 25.4 mm.
3. The method for testing gasified rust inhibitive performance of claim 1, wherein 240# aluminum oxide cloth is used for the metal polishing.
4. The gasification rust inhibitive performance test method according to claim 1, wherein the test specimen (4) is a rust inhibitive film or a rust inhibitive paper.
5. The method of claim 1, wherein the sample (4) has a length of 178mm and a width of 63.5 mm.
6. The gasification type rust inhibitive performance test method according to claim 1, wherein the grid table (3) comprises an upper cylinder (301), a lower cylinder (302), and a grid plate (303), wherein the upper cylinder (301) and the lower cylinder (302) are fixed on both sides of the grid plate (303), the upper cylinder (301) and the lower cylinder (302) are coaxially arranged, and the peripheral side of the test sample (4) is closely attached to the inner wall of the upper cylinder (301).
7. The gasification rust inhibitive performance test method according to claim 6, wherein the upper cylinder (301) is 25.4mm high, the lower cylinder (302) is 76mm high, and the mesh plate (303) is 3.2mm thick.
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