CN114894653A - Method for testing surface performance of black chromium coating - Google Patents
Method for testing surface performance of black chromium coating Download PDFInfo
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- CN114894653A CN114894653A CN202210518981.3A CN202210518981A CN114894653A CN 114894653 A CN114894653 A CN 114894653A CN 202210518981 A CN202210518981 A CN 202210518981A CN 114894653 A CN114894653 A CN 114894653A
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 193
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 168
- 239000011651 chromium Substances 0.000 title claims abstract description 168
- 238000012360 testing method Methods 0.000 title claims abstract description 123
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910052724 xenon Inorganic materials 0.000 claims description 5
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
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- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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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
- G01N17/004—Investigating resistance of materials to the weather, to corrosion, or to light to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a method for testing the surface performance of a black chromium coating, which comprises the steps of respectively carrying out a friction test and a light accelerated aging test on a first black chromium coating sample plate and a second black chromium coating sample plate, then measuring to obtain a first color difference change value, a second color difference change value, a first glossiness retention rate, a second glossiness retention rate and a first maximum scratch width, and determining a test result according to the measurement results. The invention can test the surface performances of the black chromium coating such as wiping resistance, sunlight resistance, wiping resistance under the condition of sunlight, and the like, can simulate the conditions that the black chromium coating of an automobile part in an actual use environment is possibly corroded by pollutants, cleaned daily, subjected to sunlight, and the like, can test the surface performance of the black chromium coating from the aspects of appearance commodity property, invisible damage to naked eyes and the like, and can objectively evaluate the surface performance of the black chromium coating, thereby being applied to the fields of black chromium coating product design, quality inspection and the like. The invention is widely applied to the technical field of automobile accessory testing.
Description
Technical Field
The invention relates to the technical field of automobile part testing, in particular to a method for testing the surface performance of a black chromium coating.
Background
The black chromium plating is applied to automobile parts such as front and rear bumpers, grilles, signs, automobile body anti-friction decoration strips, handles, center control instrument panels and the like, and can generate black metal appearance effects on the automobile parts. Black chromium coatings are composed of alloys of chromium and have poorer surface properties than pure chromium coatings. For example, the black chromium plating layer cannot generate a passive film by itself, and the hardness, wear resistance and corrosion resistance of the black chromium plating layer are poor, so that the current surface performance testing technology of the pure chromium plating layer cannot be applied to the surface performance testing of the black chromium plating layer.
Disclosure of Invention
Aiming at the technical problems that no surface performance testing technology suitable for the black chromium coating exists at present, and the like, the invention aims to provide a method for testing the surface performance of the black chromium coating, which comprises the following steps:
obtaining a first black chromium coating sample plate and a second black chromium coating sample plate;
measuring the first black chromium coating sample plate to obtain a first color difference value and a first glossiness value;
performing a friction test on the first black chromium coating sample plate, and measuring to obtain a second color difference value and a second glossiness value;
carrying out an illumination accelerated aging test on the first black chromium coating sample plate and the second black chromium coating sample plate, and then measuring; measuring the first black chromium plating sample plate to obtain a third color difference value, a third glossiness value and a first maximum scratch width, and measuring the second black chromium plating sample plate to obtain a fourth color difference value and a fourth glossiness value;
determining a first color difference change value according to the first color difference value and the second color difference value; determining a first gloss retention according to the first gloss value and the second gloss value;
determining a second color difference change value according to the third color difference value and the fourth color difference value; determining a second gloss retention according to the third gloss value and the fourth gloss value;
and determining a test result according to the first color difference change value, the second color difference change value, the first glossiness retention rate, the second glossiness retention rate and the first maximum scratch width.
Further, the measurement after the friction test of the first black chromium plating sample plate comprises the following steps:
smearing pollutants on the first black chromium coating template and standing for a period of time;
putting the first black chromium coating sample plate into a friction tester; the friction testing machine comprises a plurality of friction heads, wherein test cotton cloth is fixed on each friction head, and each test cotton cloth is soaked by different types of cleaning agents;
performing a friction test on each position on the first black chromium coating sample plate by using each friction head;
measuring the position of the first black chromium coating sample plate after the friction test to obtain a plurality of color difference values and a plurality of glossiness values;
and taking the average value of the plurality of color difference values as the second color difference value, and taking the average value of the plurality of glossiness values as the second glossiness value.
Further, when the first black chrome plating template comes from the exterior parts of the vehicle, the contaminants include artificial dust, and vehicle detergent.
Further, when the first black chrome plating template is from a vehicle interior trim part, the contaminants include artificial sweat, cosmetics, food.
Further, the different kinds of detergents include pure water, neutral detergent, and alcohol.
Further, the measurement after the light accelerated aging test is performed on the first black chromium plating sample plate and the second black chromium plating sample plate includes:
putting the first black chromium coating sample plate and the second black chromium coating sample plate into a xenon accelerated aging testing machine to perform an illumination accelerated aging test;
after the illumination accelerated aging test is finished, cleaning and drying the first black chromium coating sample plate and the second black chromium coating sample plate;
measuring positions of the first black chromium coating sample plate and the second black chromium coating sample plate after friction tests to respectively obtain a plurality of color difference values and a plurality of glossiness values;
taking an average value of a plurality of color difference values measured from the first black chromium plating sample plate as the third color difference value, and taking an average value of a plurality of gloss values measured from the first black chromium plating sample plate as the third gloss value; the average value of the plurality of color difference values measured from the second black chrome plating sample plate was taken as the fourth color difference value, and the average value of the plurality of gloss values measured from the second black chrome plating sample plate was taken as the fourth gloss value.
Further, the measurement after the light accelerated aging test is performed on the first black chromium plating sample plate and the second black chromium plating sample plate, further includes:
carrying out microscopic shooting on the first black chromium coating sample plate to obtain a first micrograph;
the first micrograph is measured to obtain the first maximum scratch width.
Further, determining a test result according to the first color difference change value, the second color difference change value, the first gloss retention ratio, the second gloss retention ratio, and the first maximum scratch width includes:
and when the first color difference change value, the second color difference change value, the first glossiness retention rate, the second glossiness retention rate and the first maximum scratch width are all in the corresponding qualified intervals, determining that the test result is qualified, otherwise, determining that the test result is unqualified.
Further, the method for testing the surface performance of the black chromium coating also comprises the following steps:
performing a friction test on the second black chromium coating sample plate, and then measuring to obtain a fifth color difference value, a fifth glossiness value and a second maximum scratch width;
determining a third color difference change value according to the fifth color difference value and the second color difference value; determining a third gloss retention according to the fifth gloss value and the second gloss value;
and determining a test result according to the third color difference change value, the third glossiness retention rate and the second maximum scratch width.
Further, the determining a test result according to the third color difference variation value, the third gloss retention ratio, and the second maximum scratch width includes:
and when the third color difference change value, the third glossiness retention rate and the second maximum scratch width are all in the corresponding qualified intervals, determining that the test result is qualified, otherwise, determining that the test result is unqualified.
The beneficial effects of the invention are: the method for testing the surface performance of the black chromium coating in the embodiment can test the surface performance of the black chromium coating, such as wiping resistance, sunlight resistance, wiping resistance under the condition of sunlight, and the like, can simulate the conditions that the black chromium coating of an automobile part in an actual use environment is possibly corroded by pollutants, cleaned daily, and subjected to sunlight, and the like, comprehensively test the surface performance of the black chromium coating from different angles, such as appearance commodity, invisible damage to naked eyes, and the like, and can objectively evaluate the surface performance of the black chromium coating, so that the method can be applied to the fields of black chromium coating product design, quality inspection, and the like.
Drawings
FIG. 1 is a flow chart of a surface property test method of a black chromium coating in an embodiment;
FIG. 2 is a schematic view of a first black chrome plating template and a second black chrome plating template in an example;
FIG. 3 is a schematic structural view of a friction tester in an embodiment;
FIG. 4 is a schematic illustration of the first and second micrographs in the example.
Detailed Description
In this embodiment, referring to fig. 1, the method for testing the surface performance of the black chromium plating layer includes the following steps:
s1, obtaining a first black chromium coating sample plate and a second black chromium coating sample plate;
s2, measuring the first black chromium coating sample plate to obtain a first color difference value and a first glossiness value;
s3, measuring the first black chromium coating sample plate after a friction test is carried out on the first black chromium coating sample plate to obtain a second color difference value and a second glossiness value;
s4, carrying out an illumination accelerated aging test on the first black chromium coating sample plate and the second black chromium coating sample plate, and then measuring; measuring the first black chromium plating sample plate to obtain a third color difference value, a third glossiness value and a first maximum scratch width, and measuring the second black chromium plating sample plate to obtain a fourth color difference value and a fourth glossiness value;
s5, determining a first color difference change value according to the first color difference value and the second color difference value; determining a first gloss retention ratio according to the first gloss value and the second gloss value;
s6, determining a second color difference change value according to the third color difference value and the fourth color difference value; determining a second gloss retention according to the third gloss value and the fourth gloss value;
s7, determining a test result according to the first color difference change value, the second color difference change value, the first glossiness retention rate, the second glossiness retention rate and the first maximum scratch width.
In step S1, the first black chromium plating template and the second black chromium plating template may be randomly selected from a plurality of automobile parts during the production or testing of the automobile parts. For example, among the black chromium plated automobile signs manufactured in a batch, two black chromium plated automobile signs were randomly selected as the first black chromium plating sample T1 and the second black chromium plating sample T2, respectively. The first black chromium plating sample plate T1 and the second black chromium plating sample plate T2 may have the same size and be produced based on the same black chromium plating process.
In this embodiment, the first black chrome plating sample plate T1 and the second black chrome plating sample plate T2 are both 150mm × 30mm as shown in fig. 2. Positions indicated by ellipses in fig. 2 are marked on the first black chromium plating sample plate T1 and the second black chromium plating sample plate T2 as positions where measurement, friction test, and the like are subsequently performed.
In step S2, before various treatments are performed on the first black-chrome plating sample plate T1, the first black-chrome plating sample plate is measured by using a color difference meter to obtain a first color difference value E 1 (L, A, B values), the first black chrome plating sample was measured using a gloss meter to obtain a first gloss value S 1 . First hue difference value E 1 And a first gloss value S 1 In fact the initial value.
In this embodiment, when step S3, that is, the step of obtaining the second color difference value and the second gloss value by performing the friction test on the first black chromium plating sample, is executed, the following steps may be specifically executed:
s301, smearing pollutants on the first black chromium coating template and standing for a period of time;
s302, placing the first black chromium coating sample plate into a friction tester; the friction testing machine comprises a plurality of friction heads, wherein test cotton cloth is fixed on each friction head, and each test cotton cloth is soaked by different types of cleaning agents;
s303, performing friction tests on each position on the first black chromium coating sample plate by using each friction head;
s304, measuring the positions of the first black chromium coating sample plate after the friction test to obtain a plurality of color difference values and a plurality of glossiness values;
s305, taking the average value of the plurality of color difference values as a second color difference value, and taking the average value of the plurality of glossiness values as a second glossiness value.
In step S301, a reagent or a contaminant with 0.1ml of liquid or 0.1g of solid may be sucked by a rubber dropper, and the contaminant is uniformly smeared at the position for measuring the color difference and is left at room temperature for 24 hours. These agents or contaminants are selected based on the actual use of the automobile parts. For example, when the first black chrome plating pattern T1 is derived from exterior parts of vehicles such as front and rear bumpers, grilles, etc., artificial dust or vehicle cleaners such as car wash wax, glass cleaner, acid and alkali chemical agents, etc. may be used as contaminants; when the first black chrome plating pattern T1 is derived from a vehicle interior such as a center console, artificial sweat, food, or cosmetics such as lipstick and perfume may be used as contaminants.
In step S302, the first black chrome plating template T1 is placed in a friction tester. In this embodiment, the friction tester has a plurality of friction heads, and the structure of each friction head is as shown in fig. 3, and the friction head is provided with a weight capable of increasing gravity, and is wrapped with a test cotton cloth, and the test cotton cloth can be soaked by a cleaning agent. The friction head is driven by the connecting rod to be attached to the first black chromium plating template T1 to reciprocate.
In step S302, a friction tester having 3 friction heads is used, and the friction tester is applied to three measurement positions on the first black chromium plating template T1 as shown in fig. 2. Among the 3 friction heads, the test cotton cloth of 1 friction head was soaked by pure water, the test cotton cloth of the first friction head was soaked by pure water, the test cotton cloth of the second friction head was soaked by neutral detergent, and the test cotton cloth of the third friction head was soaked by alcohol.
In step S303, the weight of the weight is adjusted so that the load of the friction head is equal to the force (e.g., 2N) to be wiped when the automobile part is actually used, the reciprocating speed of the friction tester is set to 25 times per minute, and the first black-chromium plating sample plate T1 is rubbed 50 times.
In step S304, after the first black chromium plating sample T1 is washed clean with pure water, the first black chromium plating sample T1 is dried with a blower, and the position of the first black chromium plating sample T1 that has undergone the friction test is measured, so as to obtain a plurality of color difference values and a plurality of gloss values. Specifically, the measurement may be performed at a plurality of measurement positions shown in fig. 2 in the first black chrome plating sample plate T1 using a color difference meter, respectively, to obtain a plurality of measurement values, and step S305 may be performed to use the average value of the measurement values as the second color difference value E 2 (ii) a The first black chrome plating sample T1 may be measured at a plurality of measurement positions as shown in FIG. 2 using a gloss meter to obtain a plurality of measurement values, and the step S305 may be performed to take the average of the measurement values as the second gloss value S 2 。
In this embodiment, when the step S4 is executed, that is, the step of performing the measurement after performing the light accelerated aging test on the first black chromium plating sample plate and the second black chromium plating sample plate, the following steps may be specifically executed:
s401, placing the first black chromium coating sample plate T1 and the second black chromium coating sample plate T2 into a xenon accelerated aging testing machine for an illumination accelerated aging test;
s402, after the illumination accelerated aging test is finished, cleaning and drying the first black chromium plating layer sample plate T1 and the second black chromium plating layer sample plate T2;
s403, measuring positions of the first black chromium coating sample plate T1 and the second black chromium coating sample plate T2 which are subjected to friction tests to respectively obtain a plurality of color difference values and a plurality of glossiness values;
s404, taking an average value of a plurality of color difference values measured from the first black chromium plating sample plate T1 as a third color difference value, and taking an average value of a plurality of gloss values measured from the first black chromium plating sample plate T1 as a third gloss value; taking an average value of a plurality of color difference values measured from the second black chromium plating sample plate T2 as a fourth color difference value, and taking an average value of a plurality of gloss values measured from the second black chromium plating sample plate T2 as a fourth gloss value;
s405, carrying out microscopic shooting on the first black chromium coating sample plate to obtain a first micrograph;
s406, measuring the first micrograph to obtain a first maximum scratch width.
In step S401, the first black chromium plating sample T1 and the second black chromium plating sample T2 are put into a xenon accelerated aging tester to perform an illumination accelerated aging test
In step S402, the first black-chromium plating sample T1 and the second black-chromium plating sample T2 are taken out from the xenon accelerated weathering tester, the first black-chromium plating sample T1 and the second black-chromium plating sample T2 are washed clean with pure water, and the first black-chromium plating sample T1 and the second black-chromium plating sample T2 are dried by a blower.
In step S403, the plurality of measurement positions shown in fig. 2 in the first black chrome plating template T1 are measured by a color difference meter to obtain a plurality of color difference values, and in step S404, the plurality of color differences are calculatedThe average value of the values is taken as the third color difference value E 3 . In step S403, the plurality of measurement positions shown in fig. 2 in the second black chrome plating sample plate T2 are measured by a color difference meter to obtain a plurality of color difference values, and in step S404, an average value of the plurality of color difference values is used as a fourth color difference value E 4 . In step S403, a plurality of gloss values are obtained by measuring a plurality of measurement positions shown in FIG. 2 of the first black chrome plating template T1 using a gloss meter, and in step S404, an average value of the plurality of gloss values is used as a third gloss value S 3 . In step S403, a plurality of gloss values are obtained by measuring a plurality of measurement positions shown in FIG. 2 of the second black chrome plating template T2 using a gloss meter, and in step S404, an average value of the plurality of gloss values is used as a fourth gloss value S 4 。
In step S405, the first black chrome plating template T1 may be placed in a microscope for visual observation or photographed microscopically using a camera to obtain a first photomicrograph. The first micrograph is in the form shown in fig. 4.
In step S406, the first maximum scratch width L may be measured by observing and measuring with the naked eye or processing the first micrograph with image processing software 1 . Wherein the first maximum scratch width L 1 Is the width of the scratch having the largest width among all scratches included in the first micrograph.
In step S5, the first color difference value E is determined according to the color difference value measured in step S2 1 And the second color difference value E measured in step S3 2 Determining a first color change value Delta E 1 ＝|E 1 -E 2 L, |; first gloss value S measured according to step S2 1 And a second gloss value S measured in step S3 2 Determining a first gloss retention;
in step S6, the third color difference value E is measured according to the step S2 3 And a fourth color difference value E 4 Determining a second value of chromatic change Δ E 2 ＝|E 3 -E 4 L, |; according to a third gloss value S 3 And a fourth gloss value S 4 And determining the second gloss retention.
The rubbing test performed in step S3 can simulate a cleaning wiping operation during actual use of the automobile parts, and the light accelerated aging test performed in step S4 can simulate a sun exposure environment during actual use of the automobile parts. The first maximum scratch width L measured in step S406 1 The abrasion condition of the first black chromium plating sample T1 after the friction test and the light accelerated aging test can be reflected, so that the abrasion resistance and the sunlight resistance of the first black chromium plating sample T1 in the actual use environment can be reflected; the first color difference change value Δ E calculated in step S5 1 The first gloss retention rate can reflect the color difference change condition and the gloss retention condition of the first black chromium plating sample T1 after the friction test and the illumination accelerated aging test, so that the first black chromium plating sample T1 can be used for reflecting the wiping resistance and the sunlight resistance of the first black chromium plating sample T1 in the actual use environment; the second color difference change value Δ E calculated in step S6 2 And the second glossiness retention rate can reflect the color difference change condition and the glossiness retention condition of the first black chromium plating sample T1 subjected to the friction test and the light accelerated aging test simultaneously and the second black chromium plating sample T2 subjected to the light accelerated aging test only but not subjected to the friction test, so that the first black chromium plating sample T1 can be used for reflecting the wiping resistance performance of the first black chromium plating sample T1 in an actual use environment under the condition of being exposed to sunlight.
In step S7, the first color difference change value Δ E may be used 1 Second value of color change Δ E 2 A first gloss retention ratio, a second gloss retention ratio and a first maximum scratch width L 1 The specific size of (a) determines the test result. Specifically, the first color difference change values Δ E may be set separately 1 Second value of color change Δ E 2 A first gloss retention ratio, a second gloss retention ratio and a first maximum scratch width L 1 Respective corresponding pass intervals, e.g. for a first maximum scratch width L 1 The acceptable range can be set to [0,50 μm ]]I.e. if the first maximum scratch width L 1 > 50 μm, then the first maximum scratch width L 1 Is unqualified and canDirectly determining the test results of the first black chromium plating sample plate T1 and the second black chromium plating sample plate T2 as unqualified; if the first maximum scratch width L 1 Less than or equal to 50 μm, then the first maximum scratch width L 1 Is qualified, and can judge the first color difference change value delta E in the same way 1 And a second value of color change Δ E 2 If the other measurement results are qualified, the first color difference change value delta E 1 Second value of color change Δ E 2 A first gloss retention ratio, a second gloss retention ratio and a first maximum scratch width L 1 In the case where all the samples are qualified, the test results of the first black chromium plating sample T1 and the second black chromium plating sample T2 can be determined as being qualified; if there are some measurement results that are not good, it can be determined that the first black chromium plating sample T1 and the second black chromium plating sample T2 have the test results that are not good.
In this embodiment, the method for testing the surface performance of the black chromium plating layer further includes the following steps:
s8, measuring the second black chromium coating sample plate after a friction test to obtain a fifth color difference value, a fifth glossiness value and a second maximum scratch width;
s9, determining a third color difference change value according to the fifth color difference value and the second color difference value; determining a third gloss retention ratio according to the fifth gloss value and the second gloss value;
and S10, determining a test result according to the third color difference change value, the third glossiness retention rate and the second maximum scratch width.
The principle of step S8 is the same as step S4. Referring to steps S401 to S406, the fifth color difference value E corresponding to the second black chrome plating template T2 can be obtained by replacing the processing object in steps S401 to S406 with the first black chrome plating template T1 and the second black chrome plating template T2 5 A fifth gloss value S 5 And a second maximum scratch width L 2 。
The principle of step S9 is the same as step S5. In step S9, the fifth color difference value E is measured according to the step S8 5 And the second color difference value E measured in step S3 2 Determining a third color difference change value Delta E 3 ＝|E 5 -E 2 L, |; measured according to step S8Five gloss values S 5 And a second gloss value S 2 And determining the third gloss retention.
Since the second black chrome plating sample T2 has been subjected to the light accelerated aging test in step S4 before step S8 is performed, the second black chrome plating sample T2 is also subjected to the rubbing test and the light accelerated aging test after step S8 is performed, like the first black chrome plating sample T1, and thus the third aberration variation Δ E measured through steps S8 and S9 3 A third gloss retention ratio and a second maximum scratch width L 2 The wiping resistance and the sunlight resistance of the second black chromium plating sample plate T2 can be reflected.
The principle of step S10 is the same as step S7. In the step S10 of the present invention,
can vary the value Δ E according to the third color difference 3 A third gloss retention ratio and a second maximum scratch width L 2 The specific size of (a) determines the test result. Specifically, the third hue difference change value Δ E may be set separately 3 A third gloss retention ratio and a second maximum scratch width L 2 Respective corresponding pass intervals, e.g. for a second maximum scratch width L 2 The acceptable range can be set to [0,50 μm ]]I.e. if the second maximum scratch width L 2 > 50 μm, then the second maximum scratch width L 2 If the test result is not qualified, the test results of the first black chromium plating sample plate T1 and the second black chromium plating sample plate T2 can be directly determined to be not qualified; if the second maximum scratch width L 2 Less than or equal to 50 mu m, then the second maximum scratch width L 2 Is qualified, and can judge the third aberration variation value delta E in the same way 3 And the third gloss retention rate is qualified or not, and the change value delta E of the third color difference is 3 A third gloss retention ratio and a second maximum scratch width L 2 In the case where all the samples are qualified, the test results of the first black chromium plating sample T1 and the second black chromium plating sample T2 can be determined as being qualified; if there are some measurement results that are not good, it can be determined that the first black chromium plating sample T1 and the second black chromium plating sample T2 have the test results that are not good.
The third color difference change value Δ measured through steps S8 and S9E 3 A third gloss retention ratio and a second maximum scratch width L 2 And the first color difference change value Δ E measured through step S5 1 A first gloss value and a first maximum scratch width L 1 In contrast, they all have the same meaning, i.e. the third colour difference change Δ E 3 A third gloss retention ratio and a second maximum scratch width L 2 The scratch resistance of the second black chromium plating sample T2 after being exposed to the sun can be reflected, and the first color difference change value Delta E 1 A first gloss value and a first maximum scratch width L 1 The sunlight resistance performance of the first black chromium plating sample T1 after being wiped can be reflected, the difference is that the reflected samples are different, therefore, the steps S1-S7 are executed, and S8-S10 is executed, so that the sampling error in the process of obtaining the first black chromium plating sample T1 can be reduced by considering the difference of different samples.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the descriptions of upper, lower, left, right, etc. used in the present disclosure are only relative to the mutual positional relationship of the constituent parts of the present disclosure in the drawings. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, unless defined otherwise, all technical and scientific terms used in this example have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description of the embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this embodiment, the term "and/or" includes any combination of one or more of the associated listed items.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element of the same type from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. The use of any and all examples, or exemplary language ("e.g.," such as "or the like") provided with this embodiment is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed.
It should be recognized that embodiments of the present invention can be realized and implemented by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Further, operations of processes described in this embodiment can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described in this embodiment (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.
Further, the method may be implemented in any type of computing platform operatively connected to a suitable connection, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, or the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or write storage medium, RAM, ROM, or the like, such that it may be read by a programmable computer, which when read by the storage medium or device, is operative to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described in this embodiment includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein.
A computer program can be applied to input data to perform the functions described in the present embodiment to convert the input data to generate output data that is stored to a non-volatile memory. The output information may also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including particular visual depictions of physical and tangible objects produced on a display.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means. The invention is capable of other modifications and variations in its technical solution and/or its implementation, within the scope of protection of the invention.
Claims (10)
1. A surface performance test method of a black chromium plating layer is characterized by comprising the following steps:
obtaining a first black chromium coating sample plate and a second black chromium coating sample plate;
measuring the first black chromium coating sample plate to obtain a first color difference value and a first glossiness value;
performing a friction test on the first black chromium coating sample plate, and measuring to obtain a second color difference value and a second glossiness value;
carrying out an illumination accelerated aging test on the first black chromium coating sample plate and the second black chromium coating sample plate, and then measuring; measuring the first black chromium plating sample plate to obtain a third color difference value, a third glossiness value and a first maximum scratch width, and measuring the second black chromium plating sample plate to obtain a fourth color difference value and a fourth glossiness value;
determining a first color difference change value according to the first color difference value and the second color difference value; determining a first gloss retention according to the first gloss value and the second gloss value;
determining a second color difference change value according to the third color difference value and the fourth color difference value; determining a second gloss retention according to the third gloss value and the fourth gloss value;
and determining a test result according to the first color difference change value, the second color difference change value, the first glossiness retention rate, the second glossiness retention rate and the first maximum scratch width.
2. The method for testing the surface performance of the black chromium coating according to claim 1, wherein the measurement after the friction test of the first black chromium coating template comprises:
smearing pollutants on the first black chromium coating template and standing for a period of time;
putting the first black chromium coating sample plate into a friction tester; the friction testing machine comprises a plurality of friction heads, wherein test cotton cloth is fixed on each friction head, and each test cotton cloth is soaked by different types of cleaning agents;
performing a friction test on each position on the first black chromium coating sample plate by using each friction head;
measuring the position of the first black chromium coating sample plate after the friction test to obtain a plurality of color difference values and a plurality of glossiness values;
and taking the average value of the plurality of color difference values as the second color difference value, and taking the average value of the plurality of glossiness values as the second glossiness value.
3. The method as claimed in claim 2, wherein when the first black chrome plating template is from exterior parts of a vehicle, the contaminants include artificial dust and detergent for the vehicle.
4. The method for testing the surface performance of black chrome plating according to claim 2, wherein the contaminants include artificial sweat, cosmetics, food when the first black chrome plating template is from a vehicle interior.
5. The method for testing the surface properties of a black chrome plating layer according to claim 2, wherein the different kinds of detergents include pure water, neutral detergent and alcohol.
6. The method for testing the surface performance of the black chromium coating according to any one of claims 2 to 5, wherein the measurement after the light accelerated aging test of the first black chromium coating sample plate and the second black chromium coating sample plate comprises:
putting the first black chromium coating sample plate and the second black chromium coating sample plate into a xenon accelerated aging testing machine to perform an illumination accelerated aging test;
after the illumination accelerated aging test is finished, cleaning and drying the first black chromium coating sample plate and the second black chromium coating sample plate;
measuring positions of the first black chromium coating sample plate and the second black chromium coating sample plate after friction tests to respectively obtain a plurality of color difference values and a plurality of glossiness values;
taking an average value of a plurality of color difference values measured from the first black chromium plating sample plate as the third color difference value, and taking an average value of a plurality of gloss values measured from the first black chromium plating sample plate as the third gloss value; the average value of the plurality of color difference values measured from the second black chrome plating sample plate was taken as the fourth color difference value, and the average value of the plurality of gloss values measured from the second black chrome plating sample plate was taken as the fourth gloss value.
7. The method for testing the surface performance of the black chromium coating according to claim 6, wherein the measurement is performed after the light accelerated aging test is performed on the first black chromium coating sample plate and the second black chromium coating sample plate, and further comprising:
carrying out microscopic shooting on the first black chromium coating sample plate to obtain a first micrograph;
the first micrograph is measured to obtain the first maximum scratch width.
8. The method for testing the surface performance of the black chromium coating according to claim 1, wherein the determining the test result according to the first color difference variation value, the second color difference variation value, the first gloss retention ratio, the second gloss retention ratio and the first maximum scratch width comprises:
and when the first color difference change value, the second color difference change value, the first glossiness retention rate, the second glossiness retention rate and the first maximum scratch width are all in the corresponding qualified intervals, determining that the test result is qualified, otherwise, determining that the test result is unqualified.
9. The method for testing the surface performance of a black chromium plating according to claim 1, further comprising:
performing a friction test on the second black chromium coating sample plate, and then measuring to obtain a fifth color difference value, a fifth glossiness value and a second maximum scratch width;
determining a third color difference change value according to the fifth color difference value and the second color difference value; determining a third gloss retention according to the fifth gloss value and the second gloss value;
and determining a test result according to the third color difference change value, the third glossiness retention rate and the second maximum scratch width.
10. The method for testing surface properties of a black chrome plating layer according to claim 9, wherein the determining the test result according to the third color difference variation value, the third gloss retention ratio and the second maximum scratch width includes:
and when the third color difference change value, the third glossiness retention rate and the second maximum scratch width are all in the corresponding qualified intervals, determining that the test result is qualified, otherwise, determining that the test result is unqualified.
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| JPH10176991A (en) * | 1996-10-14 | 1998-06-30 | Sumitomo Metal Ind Ltd | Method for detecting surface state of chromium-series stainless steel plate |
| CN108531854A (en) * | 2018-03-21 | 2018-09-14 | 中信戴卡股份有限公司 | A kind of ageing-resistant periodic variable reacts black chromium plated film and forming method |
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