With the changes in seasons and work tasks, most agricultural locomotives are often parked for long periods of time. Agricultural vehicles parked for a long time, especially those parked in the open air, are naturally eroded by wind, sunlight, rain, etc., making the vehicles prone to metal rust, aging of rubber products, mildew of cotton fabrics, decay of wood products, etc. Seriously affected the technical performance and service life of the vehicle. Therefore, in the process of long-term parking of vehicles, it is necessary to strengthen management, and take timely and effective protective measures in response to different situations, so as to avoid or mitigate the adverse effects of various external factors on the parts during the parking of the vehicle as much as possible. The original performance of the vehicle makes it in a good technical state. First, metal parts corrosion and protection of metal corrosion refers to the appearance of brown rust on the surface, loss of luster, severe formation of flakes or powder oxide peeling phenomenon. As a result, the cross-sectional dimensions of the metal parts are gradually reduced, the mechanical strength is reduced, the service life is shortened, and the use value is completely lost. Most of the parts of the vehicle are ferrous metal products. The corrosion is mainly due to electrochemical corrosion. The internal reason is that the internal structure of the iron and steel material is not pure, external factors are the aqueous solution of acid, alkali and salt, and the role of oxygen, carbon dioxide, sulfur dioxide, ammonia and other media, so that the metal surface electrochemical corrosion, resulting in metal corrosion. The method of protection against corrosion of metal parts of vehicles is mainly to prevent the contact between metal parts and external media, and to prevent and eliminate the conditions for the formation of electrolytes (such as aqueous solutions of acids, alkalis, and salts) on the parts. The main measures are: (1) Separating the metal surface from the outside world. Adhere to the frequent maintenance of the surface of the metal parts, remove the moisture, dust, and other impurities adhering to the surface of the metal parts, coat them with oil, grease, paint, or wrap them with oil paper to isolate them from the outside world. (2) Use a gaseous or liquid rust inhibitor in a closed container. For example, use a vehicle-specific deoxygenation sealer or vapor-phase rust inhibitor in dry-type sealed radiators or oil tanks, and use anti-rust solvents in wet-type enclosed radiators. (3) Seal the pores of the vehicle assembly and prevent air, moisture, and dust from entering the interior. (4) Pay attention to the selection and improvement of the environment in which the vehicles are parked. Do not store garbage, firewood, and corrosive substances nearby to prevent the emission of harmful gases. The garage should be kept clean and it should be ventilated regularly to keep the relative air humidity below 70%. Second, aging and aging rubber products refers to the vehicle tires, gaskets, dust jackets, tapes and other rubber products, cracks, elasticity and strength decreased, the surface sticky, hard and brittle, broken and other phenomena. After aging of the rubber products, the properties deteriorate and the service life is shortened. Measures to slow the aging of rubber products are as follows: (1) Avoid exposure. Under the effect of high temperature, the rubber will decompose the unsaturated hydrogen sulfide, it is easy to combine with oxygen and accelerate its aging rate. Tests have shown that when the ambient temperature rises by 10°C, the rate of rubber aging doubles. Especially in direct sunlight, it can promote rubber aging. Under the effect of light, the air permeability of rubber increases, and oxygen easily penetrates into the interior to generate oxidation. The light can also make part of the oxygen become ozone (more active than oxygen), which accelerates the oxidation of rubber. In addition, the light can also oxidize the free sulfur and bound sulfur in the rubber, and generate sulphuric acid and sulfurous acid in water, which can damage the rubber. In order to reduce the aging of the tires, external protection should be strengthened, such as parking the vehicle in storage, and using metal garage doors as much as possible; applying new technologies, new materials, such as coating polyurethane anti-aging coating on the outer surface of tires, etc. . (2) Avoid long-term stress deformation. Rubber products can be fatigued when subjected to pressure or pulling force for a long time, making the rubber hardened, reducing its elasticity, and causing permanent deformation. In order to prevent permanent deformation after the tire is stressed, the tire must leave the ground during long-term parking of the vehicle. (3) Avoid contamination of rubber products with oil. If rubber parts are contaminated with mineral oil (gasoline, diesel oil, grease, lubricating oil, etc.), the volume expands, the gum becomes soft, and the elasticity decreases. Therefore, rubber parts should avoid the exposure of petroleum products. If it is inadvertently soiled, it should be wiped clean immediately. Third, wood, cotton and linen products deterioration and protection of cargo compartments, cushions, backrests, tarpaulin and other wood and cotton and linen products, easy to absorb moisture items, especially in wet areas or rainy season, these items will make water after the monomer mold Accelerate reproduction, causing decay and mildew. At the same time, wood and cotton products are also easily bitten by insects and rats. Methods to prevent deterioration of wood and cotton products include: (1) The use of anti-mold agents to inhibit or kill mold. When conditions permit, controlling the temperature and humidity of the garage can also prevent mold growth. (2) Do regular inspections and cleaning work to prevent pests from destroying. (3) Always ventilate the air and keep the parts dry.
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