Explanation of coating and film performance terms

1 State in container: whether the original paint of new container cover is good, whether there are crusts, thickening, gel, caking, and whether it can be stirred evenly 2 Nonvolatile content (solid content): the percentage of all non turbid substances in the paint 3 Adaptability and compatibility: the product is applied to the substrate without adverse reactions 4 Covering power: refers to the ability of the color paint to eliminate the color difference of the base material or the previous coating 5 Levelness: the wet film after spin coating can flow to eliminate brush marks, and can get even and even paint film in drying time 6 Repainting property: the degree of difficulty of coating for more than two times and multi-layer coating Each coating can form a border coating, with good combination between layers, and ensure that the final composite coating has a good protective and decorative effect on the coating 7 Adhesion: the firmness of the combination between the coating and the coating (through physical and chemical action), or the adhesion between the layers of the previous coating 8 Hardness: refers to the ability of the coating to resist the impact, indentation, scratch and other mechanical forces 9 Flexibility: the ability of the coating to deform with the substrate without damage 10 Impact resistance: the ability of the coating to deform rapidly without cracking or falling off from the metal substrate under the impact of heavy hammer 11 Tensile strength: refers to the strength of the film against the tensile force, that is, the load applied to the unit cross-sectional area when the free film breaks or plastic changes after tensile test 12 Extension tension: refers to the percentage of the increase in the length of the film under the action of tension, that is, the applied load applied from the beginning of the free film to the time when the film breaks during the force test 13 Wear resistance: refers to the resistance of the coating to external friction 14 Water resistance: refers to the ability of the film to resist blistering and falling off under the action of water penetration 15 Corrosion resistance: refers to the ability of the coating film to resist the corrosive action of the corrosive medium and prevent the corrosion of the coating 16 Salt fog resistance: refers to the resistance of the coating to the salt fog erosion 17 Mildew resistance: the ability of the coating to resist mold growth 18 Heat and humidity resistance: the ability of coating to high temperature and high humidity environment 19 Weather resistance: refers to the degree that the coating is exposed to the sun, rain, snow and chemical air pollution outdoors and can maintain its original performance 21 Light and color retention: refers to the performance that the coating can basically maintain the original luster and color 22 Resistance to alternation of dry and wet: the film still maintains its original performance after being subjected to alternation of dry and wet 23 Surface resistance: the ratio of DC voltage applied on the paint sample to the surface conduction current between electrodes, expressed in (ohms) 24 Breakdown voltage: under the action of uniformly increasing voltage, the voltage value when the film is broken down (expressed in kilovolts) 25 Freeze thaw resistance: the degree to which the coating maintains its original performance after being tested by freezing and melting cycles.