How to inspect paint film for container house?

How to inspect the paint film of container houses?

When purchasing a container house, it is worth paying attention to the paint film on the outside. The quality of the paint film of the container house will affect the length of its service life, so how to What about inspecting the paint film? Let's teach you the following.

1. Inspection of paint film color and appearance inspection

Determine the color of container house paint film and its appearance, The visual method should be used to compare the color of the paint film and its appearance with the standard swatches and standard samples for observation and evaluation. Before painting construction, the color of the paint should be inspected. After the paint painted on the test plate is dried, its color should be consistent with the color specified in the design; the inspection is generally compared with the color code of the standard color card; the appearance of the paint film, It should be uniform, dense and full of luster

2. Inspection of the flexibility of the paint film

Determination of the flexibility of the paint film of the container house, It is to bend the sample plate on shaft rods of different diameters, and it is expressed by the diameter of the smaller shaft rod that does not cause damage to the paint film. The flexibility of the paint film is the comprehensive performance of the paint film attached to the substrate after being bent, and it is related to the tensile strength, tensile strength, thickness and adhesion of the paint film.

3. Determination of paint film gloss

When the surface of the object is irradiated with light, the light The property of reflection in a direction is called gloss. The glossiness of the sample is expressed as a percentage of the ratio of the amount of regular reflection light from the surface of the sample to the amount of regular reflection light from the surface of the standard sample under the same conditions at a specified incident angle.

4. Water resistance test of paint film

Water resistance of paint film refers to immersing paint film in water or boiling water Carry out the test, and after reaching the specified time, it is expressed as the surface change of the paint film. Water resistance refers to the changes in the properties of the physical and chemical reactions that occur when the paint film is immersed in water. The water resistance of the paint film is an important item to test the quality of the paint, because many paints are used in water, underground or humid conditions for a long time. . Even if it is not used in water for a long time, bubbles, loss of light, discoloration, etc., or the paint film can be restored to its original state after leaving the water, but the quality of the paint film will also be affected, thereby reducing its protective performance.

5. Inspection of heat resistance of paint film

Heat resistance of paint film refers to the test of paint film in blast oven Or heated in a high-temperature furnace, and after reaching the specified temperature and time, its rationality or surface change phenomenon. All kinds of container house coatings have a temperature range of use. If the temperature is too high or too low, it will affect the quality of the paint film. Especially, the coatings used under high temperature conditions should pay attention to testing their heat resistance to prevent them from being used after construction. When layering, bubbling, cracking and discoloration occur, the protective properties of the paint film are lost or reduced.

6. Paint film abrasion resistance test

The abrasion resistance of container house paint film refers to the paint film can withstand The ability to wear can be measured using a paint film abrasion tester. The measurement is under the load condition, after the specified number of abrasions, the weight loss (g) of the paint film is expressed.