Coating process: Determination of moisture resistance of coatings

Core tips: 1 Measurement range and description of moisture resistance of coating This method is mainly used to test the change of foaming degree and appearance of paint film after coating under 100% relative humidity and when there is always condensation water on the paint film 2 Instruments and materials (1) Humid heat box: the temperature of saturated air shall be kept at (38 ± 1) ℃ and the relative humidity must be kept at 100%; (2) distilled water: meet the requirements of GB / T 6682 grade water 3 Determination method (1) Coating according to product standard requirements 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 Coating home news: 1 The measurement range and description of the moisture resistance of the coating This method mainly tests the change of the foaming degree and appearance of the coating film after coating under the condition of 100% relative humidity of the coating sample and the condensation water on the coating film all the time 2 Instruments and materials (1) damp heat box: the temperature of saturated air shall be kept at (38 ± 1) ℃, and the relative humidity must be kept at 100%; 2) distilled water: meet the requirements of GB / T 6682 water 3 Test method (1) coating coating test plate according to product standard requirements, drying and state adjustment can also be mutually agreed by the supplier and the demander (2) Put the test plate into a humid hot box which has been adjusted to a temperature (38 ± 1) ℃ and a relative humidity of 100% (3) The paint test panel shall be placed so that condensation water is generated on the surface of the paint film, and the test panels shall not contact each other during the test (4) Damp heat test shall be carried out continuously When it is necessary to check during the test, the retention time of anticorrosive coating test plate outside the box shall not exceed 0.5h (5) At the end of the test, take out the test plate, carefully dry it with absorbent paper or cloth, and immediately check the surface condition of the paint film; then place the test plate in the environment of temperature (23 ± 2) ℃, relative humidity (50 ± 5)% for 24 hours, and then check it 4 The results show that the size, number and density of blisters and other damage phenomena are recorded 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,