Coating technology: detection of electrophoretic paint

The main results are as follows: (1) detection of the fineness of electrophoretic paint The fineness of electrophoretic paint was measured by scraper fineness meter (2) Detection of pH value of electrophoretic paint See the following table for configuration requirements of paint solution to be tested for pH value of electrophoretic paint: Table 1 configuration requirements of paint solution to be tested for pH value The requirements for the classification of the serial number to be tested are 1 After the mixture of two component emulsion and deionized water is 1:1, the mixture of 2 components and deionized water is determined by volume ratio of 1:1 After mixing, the new working fluid of 3 working fluid can be determined after being cured by 2H, and the 4 fluid can be directly determined by field working fluid Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Home of coatings: (1) detection of fineness of electrophoretic paint The fineness of electrophoretic paint was measured by scraper fineness meter (2) Detection of pH value of electrophoretic paint The pH value of the electrophoretic paint needs to be measured The following table is shown below: table 1pH value The size of the lacquer solution to be tested is required to be ordinal The requirement for the classification of the liquid to be tested is 1 After mixing the two component emulsion and the deionized water volume ratio 1:1, the mixture of 2 two-component colorants and deionized water is determined by volume ratio of 1:1 After mixing, the 3 working fluid is determined, and the new working fluid can be determined after curing the 2H, and the field working fluid can be directly determined Direct determination of polar solution in 4-polar solution extraction cycle 5 Direct determination of ultrafiltration (3) detection of solid content of electrophoretic paint The detection steps of the solid content of the electrophoretic paint are as follows: ① according to the specified sampling amount (1.5-2g for the electrophoretic paint, 1.5-2g for the electrophoretic working solution and 1.5-2g for the ultrafiltration), take the tested sample and place it in the crucible (W0) that has been accurately weighed ② Weigh the crucible together with the sample (W1) to three decimal places It should be controlled at 120 ℃ and dried for about 1H ③ Put the weighed sample (together with the crucible) into the oven for drying, and the temperature shall be controlled at 120 ℃ for about 1H ④ Take out the sample, cool it to room temperature and weigh it (W2) ⑤ The formula of solid fraction (%) = (W2 ­ W0) / (w1-w0) × 100% was used to calculate the solid fraction of electrophoretic paint (4) Conductivity detection of electrophoretic paint Conductivity, also known as specific conductivity, refers to the conductivity of the solution and the difficulty of conducting the solution The unit is μ s / cm, that is, the conductivity on the area of 1cm2 at 1cm spacing See the following table for configuration requirements of paint solution to be tested for conductivity of electrophoretic paint Table 2 conductivity requirements for the lacquer solution to be tested are required to be ordinal The requirement for the classification of the liquid to be tested is 1 The mixture of two component emulsion and deionized water is 1:1 mixed The mixture of 2 two-component colorants and deionized water is determined to be 1:1 After mixing, the new working fluid of 3 working fluid can be determined after being cured by 2H The field liquid can be used to directly determine the polar solution of the 4 polar liquid in circulation and directly determine 5 Direct determination of 6 deionized water by ultrafiltration (5) screen residue of electrophoretic paint Screen residue of electrophoretic paint refers to the residue of two-component color paste or working solution filtered under the standard screen The test method is to take 1000ml of the solution to be tested, filter it with 325 mesh (pore diameter is about 40 μ m) nylon mesh (recorded as W0), put the filtered mesh and residue into the oven, control the temperature at 105 ℃, dry it for 30min, take it out and cool it, accurately weigh it (recorded as W1), and record w1-w0 as the sieve residue (mg / L) (6) Sedimentation test of electrophoretic paint No matter it is electrophoretic paint, electrophoretic paint or electrophoretic paint, the detection of its precipitate adopts cone-shaped measuring cylinder method Pour the tested solution into a 1000ml cone-shaped measuring cylinder, and observe the stratification of the tested solution and the amount of pigment precipitation after a certain period of time Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,