In the "skeleton" system of railways, sleepers are key components that support rails and disperse pressure. But wood is naturally afraid of water and insects. When exposed to sunlight and rain, ordinary sleepers will rot within a few years. However, anti-corrosion sleepers can "lock" anti-corrosion oil, allowing the wood to "live" longer. The secret behind this is hidden in the "magic" of high temperature and pressure.

1、 Pine wood: the "indigenous" of sleepers

The raw materials for anti-corrosion sleepers mostly come from pine wood. This type of wood has a straight texture and a coarse structure, resembling a sponge that absorbs water and can easily "drink" anti-corrosion oil. But the "belly" of pine wood cannot hold too much oil, it needs external help - this is where the high-temperature and high-pressure oil immersion process comes in handy.

2、 High temperature and high pressure: activate anti-corrosion oil

Anti corrosion oil itself is as viscous as honey, making it difficult to penetrate the fine cracks of wood at room temperature. At this moment, high temperature and high pressure appeared. Imagine putting pine wood into a sealed "pressure cooker", filling it with hot anti-corrosion oil, and then applying high pressure. The high temperature makes the oil flow like water, while the high pressure acts like an invisible hand, pushing the oil deep into the wood.

How crucial is this process? If the temperature is not enough, the oil will become viscous and difficult to penetrate; The pressure is insufficient, and the oil can only penetrate shallowly into the surface. After undergoing high-temperature and high-pressure "baptism", the anti-corrosion oil can penetrate more than 13 millimeters deep into the interior of the wood.

3、 Cooling and solidification: locking in the "source of life"

After immersion in oil, the anti-corrosion sleepers will slowly cool down, and the anti-corrosion oil immersed in the wood will also completely solidify. This kind of solidification is not simply "hardening", but a physical combination with the wood, forming a layer of anti-corrosion coating.

4、 Simple processing: Let wood undergo a complete transformation

The process of anti-corrosion treatment is actually not complicated. The pine wood is first cut into standard sizes and then placed in a huge sealed jar. First, evacuate the tank and then inject high-temperature anti-corrosion oil. Oil is immersed in wood under pressure, and after immersion is complete, the wood is removed and naturally cooled.

5、 Why is high temperature and high pressure irreplaceable?

Someone may ask: Can't it be soaked in regular water? The answer is negative. At room temperature, anti-corrosion oil can only float on the surface and cannot penetrate deep into the interior of wood. High temperature and high pressure can break the viscosity of oil, allowing it to permeate like water.

More importantly, high temperature and pressure can make the anti-corrosion oil bond more tightly with the wood. After cooling, the oil does not simply adhere to the surface, but blends with the wood fibers. This binding force ensures that the anti-corrosion oil will not be lost during long-term use, truly achieving the "blood locking" effect.

6、 Write at the end

The "blood locking" skill of anti-corrosion sleepers is essentially a perfect combination of science and technology. High temperature and high pressure activate the anti-corrosion oil, while cooling and solidification solidify it. Although this process is simple, it can transform ordinary pine wood into a "longevity star" on the railway.