Sleepers play an important role in the railway industry, bearing the weight of trains while also dealing with external environmental factors such as sunlight and rain. Due to long-term use and environmental factors, sleepers are prone to cracking, which affects the safety and stability of railways. In order to extend the service life of sleepers, anti-corrosion treatment has become crucial, and oil injection is one of the widely used anti-corrosion methods.

The amount of oil injected is an important consideration when performing anti-corrosion treatment on sleepers. Some people believe that the more oil is injected, the less likely the sleepers are to crack. However, this may not be the case in reality. According to expert research, in general, the suitable immersion depth for anti-corrosion oil in sleepers is 10-13mm. Excessive anti-corrosion oil may not bring better anti-corrosion effects, but may instead lead to some problems with the sleepers themselves.

The prepared anti-corrosion oil is relatively thick, and the gaps in the wood itself are very small. Even pure water is not easy to penetrate into the interior in a short period of time. So generally, before anti-corrosion treatment, the sleepers will be scratched first. The so-called engraving refers to the use of a engraving machine to leave marks on the surface of the sleeper, which is equivalent to expanding the gaps on the surface of the sleeper itself, making it easier for anti-corrosion oil to penetrate into the interior of the sleeper under high temperature and pressure.

So, when it comes to cracking, what is the correlation with the depth of immersion in oil?

A simple truth is that when immersed in oil shallowly, for example, at a depth of only a few millimeters, the sleepers may not be used for long and the oil layer may be worn off, losing its anti-corrosion effect and leading to cracking. What if it exceeds the standard of 13mm? We can roughly understand when we associate it with "chopping firewood". In order to allow the anti-corrosion oil to penetrate deeper, deeper scratches may be required on the sleepers during the scratch treatment. Once the scratches are deeper, the risk of sleeper cracking will also be greater. So the appropriate immersion depth range is 10-13mm, which can ensure good anti-corrosion ability and better avoid the risk of cracking.

In summary, the amount of oil injected does indeed affect the anti-corrosion effect of sleepers. An appropriate amount of anti-corrosion oil can effectively delay the cracking of sleepers and improve their durability; Before immersing in excessive anti-corrosion oil, deeper scratches are required, which may lead to changes in the sleeper structure and exacerbate the cracking situation. In railway maintenance, engineers should reasonably control the amount of anti-corrosion oil injected according to the actual situation to ensure the safety and stability of sleepers.