The first is observation. The park chairs that have been used for a long time have obvious changes on the surface, which are specifically manifested in fading, rust and structural changes. The paint on the surface of the park chair will fade and darken after being washed by rain and exposed to the sun. At the same time, there is also a layer of red or yellow brown chemical substances on the surface of iron metal components such as metal guardrails or chair legs, which is called rust. There is also a situation that the spacing between the boards is uneven. This situation indicates the safety risks of park chairs, which should be properly handled and maintained.
Later, it can also identify whether the leisure chairs in the park have potential safety hazards according to the touch method. Generally, when touching the wood and metal materials of leisure chairs in the park, you will feel more smooth and clean. However, the existing leisure chairs in the park will not be smooth and easy to touch due to damage and corrosion.