CN104502536A - Detection method for contamination resistance of automobile paint - Google Patents
Detection method for contamination resistance of automobile paint Download PDFInfo
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- CN104502536A CN104502536A CN201410787244.9A CN201410787244A CN104502536A CN 104502536 A CN104502536 A CN 104502536A CN 201410787244 A CN201410787244 A CN 201410787244A CN 104502536 A CN104502536 A CN 104502536A
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Abstract
The invention relates to the field of automobile paint detection, and particularly relates to a detection method for contamination resistance of an automobile paint. The detection method comprises the following steps: (1) preparation of contamination liquid: mixing water and sandy soil according to the mass ratio of 1:(0.9-1.1), and regulating the pH value of the mixed solution to 0.9-1.1; and (2) detection of contamination resistance: dropwise adding the contamination solution onto a sheet which is obliquely arranged and coated with an automobile paint to be detected, and then directly observing the retention condition of the contamination solution on the sheet, thus judging the contamination resistance of the automobile paint; or, dropwise adding the contamination solution onto the sheet which is obliquely arranged and coated with the automobile paint to be detected, then baking the sheet, then washing contaminants on the surface of the sheet, and observing the situation of the surface of the sheet corroded by contamination, thus judging the contamination resistance of the automobile paint. The detection method for contamination resistance of the automobile pain is simple in steps, and low in cost, and the contamination resistance of the paint can be simply, conveniently, intuitively, strictly and scientifically judged.
Description
Technical field
The present invention relates to automobile coating detection field, particularly relate to a kind of automobile coating contaminated resistance detection method.
Background technology
Automobile coating stain resistant method does not have detection method at present, and consulting related data has GB/T 9780-2013 building coating coating contaminated resistance to test, and method is as follows;
The test of exterior coating coating stain resistance adopts experiment to be pollution source with grey standard model, be made into suspending liquid, be attached on coating test plate (panel) with brushing or infusion process, by measuring the stain resistance of the change of the reflection coefficient of front and back or the aberration ranking coating test plate (panel) according to basic ash card, brushing is adapted to flat coating, and infusion process is used in concavo-convex or shaggy coating.
The test of interior wall coating coating stain resistance adopts conventional household stains to do pollution source, is attached on coating test plate (panel) tests by the deposited method of leaching or knife coating.By carrying out the stain resistant integration capability evaluating coating to the stain resistance of different household stains.
The resistance to pickup of outer wall coating calculates stain resistance and calculates, outside X=and (A-B)/A*100%
Outside X ... .... the decline rate of reflectance of exterior coating coating:
A......... the initial average reflection coefficient of coating;
B......... the average reflection coefficient of coating after pickup;
Interior wall coating coating calculates the polluting proofing property of every section of Experimental Area spot: X=Y1/Y0*100%
X........ interior wall coating coating is to the polluting proofing property of every section of pilot region spot, retains 2 Effective Numericals;
Y1...... the average reflection coefficient of pilot region after pickup;
Y0...... the initial average reflection coefficient in test site.
Because the resistance to pickup method of automobile coating film in prior art does not have corresponding method of detection at present, so seldom have corresponding detection to paint film stain resistance.But the contaminated resistance of automobile coating is a very important parameter, if paint film stain resistance is poor, suffering the erosion of rugged surroundings, eater remains in coating surface, can have a huge impact paint film, as loss of gloss, variable color, cracking etc., increase film stain resisting method, if stain resistance is good, the eater in physical environment would not be attached to coating surface, reduces the phenomenon such as loss of gloss, variable color, cracking of paint film.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of step simple and testing result intuitive and accurate automobile coating contaminated resistance detection method, for solving the problems of the prior art.
For achieving the above object and other relevant objects, the invention provides a kind of automobile coating contaminated resistance detection method, comprise the steps:
(1) contaminating fluid configuration: water and sandy soil are mixed according to mass ratio 1:0.9-1.1, then mixed liquor pH value is adjusted to 0.9-1.1;
(2) contaminated resistance detects: step 1 gained contaminating fluid dripped on the sheet material being coated with automobile coating to be measured tiltedly put, and then directly observes the reservation situation of contaminating fluid on sheet material, thus judges the contaminated resistance of automobile coating; Or step 1 gained contaminating fluid is dripped on the sheet material being coated with automobile coating to be measured tiltedly put, again sheet material is toasted, then, after rinsing out the pollutant of plate surface, observe the situation after the contaminated corrosion of plate surface, thus judge the contaminated resistance of automobile coating.
Preferably, described automobile coating is amino acrylic baking paint system, comprises middle painting, finish paint and varnish.
In detection method provided by the present invention, sandy soil specifically refer to the soil mixed by the sand of more than 80% and the clay of less than 20%.
Preferably, use sulfuric acid to regulate when mixed liquor pH value regulates, described sulfuric acid is 98wt% aqueous sulfuric acid.
Preferably, the mixed liquor after adjustment pH is also through filtration treatment.
Preferred, described mixed liquor through the concrete mode of filtration treatment is also: use 100 order filter clothes to filter.
Preferably, contaminating fluid dripping quantity is 0.9-1.1 milliliter, and dripping is highly 11.5-12.5cm, and sheet material is 59-61 ° and tiltedly puts.
Preferably, operating temperature when contaminated resistance detects is 23 DEG C ~ 25 DEG C, and humidity is 65-75%.
Preferably, the temperature of described baking is 49-51 degree Celsius, and baking time is 1.9 ~ 2.1 hours.
Preferably, sheet material rinse out surface pollutant after, also through xenon lamp aging.
Second aspect present invention provides described detection method in the purposes of automobile coating contaminated resistance detection field.
Preferably, described automobile coating is amino acrylic baking paint system, and described automobile coating comprises middle painting, finish paint and varnish.
Automobile coating contaminated resistance detection method step provided by the present invention is simple, with low cost, and can easy, directly perceived, strictly, scientifically pass judgment on coating stain resistance, make automobile coating can increase product film stain resistant detection method in designing and developing.Detection method provided by the present invention can be used for automobile coating film increases stain resistant detection, at research and development or production testing stage effective control for product quality, this detection method can use in each automobile production factory building or former paint factory, perfect automobile coating film detection method, has had more intuitive checking and detection to resistant pickup (paint is sick).
Accompanying drawing explanation
Fig. 1 is shown as the embodiment of the present invention 1 testing result schematic diagram.
Fig. 2 is shown as the embodiment of the present invention 2 testing result schematic diagram.
Embodiment
In the prior art, although there has been numerous detection method about building coating coating contaminated resistance, but these detection methods are when being applied to automobile coating contaminated resistance and detecting, the contaminated resistance of automobile coating can not be gone out, so be not suitable for the detection of automobile coating contaminated resistance by accurate response.And inventor finds, by using specific acid pollution liquid, and by the adjustment to each parameter of detection method, simply, intuitively, exactly can detect automobile coating contaminated resistance, completing the present invention on this basis.
The invention provides the simple and testing result intuitive and accurate automobile coating contaminated resistance detection method of a kind of step, comprise the steps:
(1) contaminating fluid configuration: water and sandy soil are mixed according to mass ratio 1:0.9-1.1, then mixed liquor pH value is adjusted to 0.9-1.1;
(2) contaminated resistance detects: step 1 gained contaminating fluid dripped on the sheet material being coated with automobile coating to be measured tiltedly put, and then directly observes the reservation situation of contaminating fluid on sheet material, thus judges the contaminated resistance of automobile coating; Or step 1 gained contaminating fluid is dripped on the sheet material being coated with automobile coating to be measured tiltedly put, again sheet material is toasted, then, after rinsing out the pollutant of plate surface, observe the situation after the contaminated corrosion of plate surface, thus judge the contaminated resistance of automobile coating.
Can be used for the detection of the various automobile coating contaminated resistance in this area in detection method provided by the present invention, be preferred for the detection of the contaminated resistance of amino acrylic baking paint system.In a preferred embodiment, described automobile coating specifically comprises middle painting, finish paint and varnish, middle painting thickness 30-40 micron, finish paint thickness 12-20 micron, varnish thickness 30-40 micron.
In detection method provided by the present invention, sandy soil specifically refer to the soil mixed by the sand of more than 80% and the clay of less than 20%.
In a preferred embodiment, the mass ratio of water and sandy soil is 1:1.
In automobile coating contaminated resistance detection method provided by the present invention, preferred use sulfuric acid carries out the adjustment of pH value, the sulfuric acid used can be anhydrous slufuric acid, also can be aqueous sulfuric acid, concentration for aqueous sulfuric acid is not particularly limited, and only otherwise to goal of the invention of the present invention produces and limits.Preferably, the concentration >=98wt% of described aqueous sulfuric acid.In a preferred embodiment, the sulfuric acid used is 98wt% aqueous sulfuric acid, and the pH value after adjustment is 1.
In automobile coating contaminated resistance detection method provided by the present invention, the mixed liquor after adjustment pH is preferably also through filtration treatment, and the mixed liquor after filtration treatment should use as early as possible.In one embodiment of the present invention, mixed liquor uses 100 order filter clothes to filter, and filters gained mixed liquor and uses in 24 hours.
In automobile coating contaminated resistance detection method provided by the present invention, when step 1 gained contaminating fluid is dripped on the sheet material being coated with automobile coating to be measured tiltedly put, those skilled in the art can select the dripping quantity of the placed angle of suitable sheet material, the dropping position of contaminating fluid and contaminating fluid according to the situation of sheet material, preferred contaminating fluid dripping quantity is 0.9-1.1 milliliter, dripping is highly 11.5-12.5cm place, and sheet material is 59-61 ° and tiltedly puts.In a preferred embodiment, the dripping quantity of contaminating fluid is 1 milliliter, and dripping is highly 12cm, and sheet material is 60 ° and tiltedly puts.Described dropping is highly specially the distance of dropping place to sheet material base, the circuit that on the concrete fingerboard material of angle that described sheet material is placed, contaminating fluid flows through and the angle of surface level.
In automobile coating contaminated resistance detection method provided by the present invention, particular restriction is not had for the environment temperature operated and humidity, only otherwise to goal of the invention of the present invention produce and limit.In a preferred embodiment, environment temperature is 25 DEG C, and humidity is 75%.
In automobile coating contaminated resistance detection method provided by the present invention, when directly observing the reservation situation of contaminating fluid on sheet material, those skilled in the art can according to the reservation situation of contaminating fluid on sheet material to be measured, the contaminated resistance of direct judgement automobile coating, also one or several suitable reference sheet material can be used, by carrying out parallel contrast with reference sheet material thus observing the contaminated resistance of automobile coating more intuitively.
In a preferred embodiment, on the sheet material of the good automobile coating of contaminated resistance, contaminating fluid residue is less, and on the sheet material of the automobile coating that contaminated resistance is poor, contaminating fluid residue is more.
In automobile coating contaminated resistance detection method provided by the present invention, when contaminating fluid being dripped on the sheet material being coated with automobile coating to be measured tiltedly put, after sheet material baking, flushing, when observing the situation after the contaminated corrosion of plate surface, those skilled in the art can according to the pollution corrosion condition on sheet material to be measured, thus judge the contaminated resistance of automobile coating, also one or several suitable reference sheet material can be used, by carrying out parallel contrast with reference sheet material thus observing the contaminated resistance of automobile coating more intuitively.Preferably, described baking condition is 49-51 degree Celsius, and baking time is 2 hours, and during flushing, use water rinses.Preferred further, after sheet material baking, flushing, also through xenon lamp aging.
In a preferred embodiment, the sheet material of the good automobile coating of contaminated resistance pollutes corrosion condition comparatively light, the sheet material of the automobile coating that contaminated resistance is poor pollutes corrosion condition heavier.
In automobile coating contaminated resistance detection method provided by the present invention, when contaminating fluid being dripped after on the sheet material being coated with automobile coating to be measured tiltedly put, preferably need stop after flowing until contaminating fluid, then carrying out subsequent operation.
The present invention also provides described detection method in the purposes of automobile coating contaminated resistance detection field.Preferably, described automobile coating includes but not limited to amino acrylic baking paint system.In a preferred embodiment, described automobile coating specifically comprises middle painting, finish paint and varnish, middle painting thickness 30-40 micron, finish paint thickness 12-20 micron, varnish thickness 30-40 micron.
Automobile coating contaminated resistance detection method step provided by the present invention is simple, with low cost and result is accurate and visual, can be used for automobile coating film and increase stain resistant detection, at research and development or production testing stage effective control for product quality, this detection method can use in each automobile production factory building or former paint factory, perfect automobile coating film detection method, has had more intuitive checking and detection to resistant pickup (paint is sick).
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this instructions can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this instructions also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.
Notice, in the following example, the concrete process equipment that indicates or device all adopt conventional equipment in this area or device; All force value and scope all refer to absolute pressure.
In addition should be understood that the one or more method steps mentioned in the present invention do not repel and can also to there is additive method step or can also insert additive method step before and after described combination step between these steps clearly mentioned, except as otherwise noted; Will also be understood that, the relation that is connected between the one or more equipment/devices mentioned in the present invention is not repelled and can also to be there are other equipment/devices or can also insert other equipment/devices before and after described unit equipment/device between these two equipment/devices clearly mentioned, except as otherwise noted.And, except as otherwise noted, the numbering of various method steps is only the convenient tool differentiating various method steps, but not be ordering or the enforceable scope of restriction the present invention of restriction various method steps, the change of its relativeness or adjustment, when changing technology contents without essence, when being also considered as the enforceable category of the present invention.
Embodiment 1
Contaminating fluid configures: by pure water: the mass ratio of sandy soil=1:1 carries out contaminating fluid configuration, mix rear use anhydrous slufuric acid and regulate pH to 1, then with 100 order filter clothes, the contaminating fluid configured is filtered, for subsequent use after removing contaminating fluid impurity, used in 24 hours after contaminating fluid has configured.
Sheet material is selected: the coating that sheet material adopts is amino acrylic baking paint system, middle painting thickness 30-40 micron, finish paint thickness 12-20 micron, varnish thickness 30-40 micron, middle painting film adopts in OPZ-1 light gray and is coated with, finish paint film adopts SP M-155 Peal blackberry to dry finish paint, varnish film adopts MAC O-330 varnish, and the supplier of above-mentioned coating is NIPPON PAINT.
Sheet material 1: steel plate+middle painting+finish paint+varnish, the baking condition be coated with in OPZ-1 light gray is 140 DEG C of bakings 20 minutes, and SPM-155 Peal blackberry dries finish paint, the baking condition of MAC O-330 varnish is 140 DEG C of bakings 20 minutes;
Sheet material 2: steel plate+middle painting+finish paint+varnish, the baking condition be coated with in OPZ-1 light gray is 140 DEG C of bakings 20 minutes, and SPM-155 Peal blackberry dries finish paint, the baking condition of MAC O-330 varnish is 140 DEG C of bakings 15 minutes;
Sheet material 3: steel plate+middle painting+finish paint+varnish, the baking condition be coated with in OPZ-1 light gray is 140 DEG C of bakings 20 minutes, and SPM-155 Peal blackberry dries finish paint, the baking condition of MAC O-330 varnish is 140 DEG C of bakings 13 minutes;
Sheet material 4: steel plate+middle painting+finish paint+varnish, the baking condition be coated with in OPZ-1 light gray is 140 DEG C of bakings 20 minutes, and the baking condition that SPM-155 Peal blackberry dries finish paint MAC O-330 varnish is 140 DEG C of bakings 10 minutes;
Sheet material 5: steel plate+middle painting+finish paint+varnish, the baking condition be coated with in OPZ-1 light gray is 140 DEG C of bakings 20 minutes, and SPM-155 Peal blackberry dries finish paint, the baking condition of MAC O-330 varnish is 140 DEG C of bakings 8 minutes.
Note: be coated with in OPZ-1 light gray, baking temperature is all 140 DEG C of bakings 20 minutes, and it is different that SP M-155 Peal blackberry dries finish paint+MACO-330 varnish baking temperature.
Contaminated resistance detects: laboratory temperature 25 DEG C, humidity 75% carries out this experiment, prepare the rectangle performance board 10cm*15cm made by standard temperature, described performance board is dull and stereotyped, ready performance board is become 60 ° tiltedly put with surface level, the length of side is that the limit of 10cm is as base, then contaminating fluid is dripped at performance board upper surface 4/5 At The Height (namely from base vertical distance 12cm place), evenly drop in five positions, each position drips 1 milliliter, then observes contaminating fluid and retains situation at brassboard.
The evaluation result of sheet material 1-5 is respectively as shown in Fig. 1 (a)-Fig. 1 (e), and wherein the contaminated resistance of sheet material 1 is best, and be deteriorated gradually by sheet material 1 to sheet material 5 contaminated resistance, the contaminated resistance of sheet material 4 is the poorest.
From Fig. 1 (a)-Fig. 1 (e), the testing result obtained by contaminated resistance detection method provided by the present invention is conformed to completely with sheet material actual performance, and visible the method accurately can reflect the contaminated resistance of automobile coating film reality.
Embodiment 2
Contaminating fluid configures: by pure water: the mass ratio of sandy soil=1:1 carries out contaminating fluid configuration, mix rear use anhydrous slufuric acid and regulate pH to 1, then with 100 order filter clothes, the contaminating fluid configured is filtered, for subsequent use after removing contaminating fluid impurity, used in 24 hours after contaminating fluid has configured.
Sheet material is selected: the coating that sheet material adopts is amino acrylic baking paint system, middle painting thickness 30-40 micron, finish paint thickness 12-20 micron, varnish thickness 30-40 micron.
Sheet material 6: steel plate+middle painting+finish paint+varnish, the baking condition be coated with in OPZ-1 light gray is 140 DEG C of bakings 20 minutes, and SPM-155 Peal blackberry dries finish paint, the baking condition of MAC O-330 varnish is 140 DEG C of bakings 20 minutes;
Sheet material 7: steel plate+middle painting+finish paint+varnish, the baking condition be coated with in OPZ-1 light gray is 140 DEG C of bakings 20 minutes, and SPM-155 Peal blackberry dries finish paint, the baking condition of MAC O-330 varnish is 140 DEG C of bakings 15 minutes;
Sheet material 8: steel plate+middle painting+finish paint+varnish, the baking condition be coated with in OPZ-1 light gray is 140 DEG C of bakings 20 minutes, and SPM-155 Peal blackberry dries finish paint, the baking condition of MAC O-330 varnish is 140 DEG C of bakings 13 minutes;
Sheet material 9: steel plate+middle painting+finish paint+varnish, the baking condition be coated with in OPZ-1 light gray is 140 DEG C of bakings 20 minutes, and SPM-155 Peal blackberry dries finish paint, the baking condition of MAC O-330 varnish is 140 DEG C of bakings 8 minutes.
Contaminated resistance detects: laboratory temperature 25 DEG C, humidity 75% carries out this experiment, prepare the rectangle performance board 10cm*15cm made by standard temperature, described performance board is dull and stereotyped, ready performance board is become 60 ° tiltedly put with surface level, the length of side is that the limit of 10cm is as base, then contaminating fluid is dripped at performance board upper surface 4/5 At The Height (namely from base vertical distance 12cm place), evenly drop in five positions, each position drips 1 milliliter, stop after flowing until contaminating fluid, brassboard is put into baking oven, baking oven arranges 50 DEG C ± 1 DEG C baking 2 hours, then brassboard is taken out, the pollutant on surface is rinsed out with water, put into xenon lamp aging 2000 hours, state after the contaminated corrosion in surface of observation experiment plate.
The evaluation result of sheet material 5-7 is respectively as shown in Fig. 2 (a)-Fig. 2 (d), and wherein the contaminated resistance of sheet material 6 is best, and be deteriorated gradually by sheet material 6 to sheet material 9 contaminated resistance, the contaminated resistance of sheet material 9 is the poorest.Wherein sheet material 6 does not stain substantially, and the slight loss of gloss of sheet material 7. pollution place expands, shrinkage, and sheet material 8 pollution place slight edge ftractures, and sheet material 9 pollution place is seriously ftractureed.
From Fig. 2 (a)-Fig. 2 (d), the testing result obtained by contaminated resistance detection method provided by the present invention is conformed to completely with sheet material actual performance, and visible the method accurately can reflect the contaminated resistance of automobile coating film reality.
In sum, the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (9)
1. an automobile coating contaminated resistance detection method, comprises the steps:
(1) contaminating fluid configuration: water and sandy soil are mixed according to mass ratio 1:0.9-1.1, then mixed liquor pH value is adjusted to 0.9-1.1;
(2) contaminated resistance detects: step 1 gained contaminating fluid dripped on the sheet material being coated with automobile coating to be measured tiltedly put, and then directly observes the reservation situation of contaminating fluid on sheet material, thus judges the contaminated resistance of automobile coating; Or step 1 gained contaminating fluid is dripped on the sheet material being coated with automobile coating to be measured tiltedly put, again sheet material is toasted, then, after rinsing out the pollutant of plate surface, observe the situation after the contaminated corrosion of plate surface, thus judge the contaminated resistance of automobile coating.
2. a kind of automobile coating contaminated resistance detection method as claimed in claim 1, it is characterized in that, described automobile coating comprises middle painting, finish paint and varnish.
3. a kind of automobile coating contaminated resistance detection method as claimed in claim 1, is characterized in that, uses sulfuric acid to regulate when mixed liquor pH value regulates.
4. a kind of automobile coating contaminated resistance detection method as claimed in claim 1, is characterized in that, the mixed liquor after adjustment pH is also through filtration treatment.
5. a kind of automobile coating contaminated resistance detection method as claimed in claim 1, it is characterized in that, contaminating fluid dripping quantity is 0.9-1.1 milliliter, and dripping is highly 11.5-12.5cm, and sheet material is 59-61 ° and tiltedly puts.
6. a kind of automobile coating contaminated resistance detection method as claimed in claim 1, is characterized in that, operating temperature when contaminated resistance detects is 23 DEG C ~ 25 DEG C, and humidity is 65-75%.
7. a kind of automobile coating contaminated resistance detection method as claimed in claim 1, is characterized in that, the temperature of described baking is 49-51 degree Celsius, and baking time is 1.9 ~ 2.1 hours.
8. a kind of automobile coating contaminated resistance detection method as claimed in claim 1, is characterized in that, sheet material rinse out surface pollutant after, also through xenon lamp aging.
9. the automobile coating contaminated resistance detection method as described in claim as arbitrary in claim 1-8 is in the purposes of automobile coating contaminated resistance detection field.
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| CN106680189A (en) * | 2015-11-06 | 2017-05-17 | 浙江海洋学院 | Machine for testing abrasion property of marine coating |
| CN108303520A (en) * | 2018-02-12 | 2018-07-20 | 安徽江淮汽车集团股份有限公司 | A kind of defeated paint mixing system shrinkage cavity test method of painting dressing automobiles |
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| CN111175220A (en) * | 2020-02-24 | 2020-05-19 | 中国第一汽车股份有限公司 | Method for detecting bird dung resistance of artificial bird dung liquid and coating |
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| CN111175220A (en) * | 2020-02-24 | 2020-05-19 | 中国第一汽车股份有限公司 | Method for detecting bird dung resistance of artificial bird dung liquid and coating |
| CN111579728A (en) * | 2020-06-15 | 2020-08-25 | 江苏徐工工程机械研究院有限公司 | Detection device and detection method for contamination resistance of industrial coating |
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