After the CCTV 315 Evening Gala exposed consumer scandals such as "second-class sanitary diapers returning to the market" and "1 pound of shrimp, 7 liang of ice", the public's vigilance towards product quality was once again awakened. When the superficial "illusion" becomes a means for some businesses to profit, consumers need a pair of "sharp eyes" even more. This vigilance also applies to the field of railway engineering - seemingly identical black sleepers may have vastly different internal qualities.

1、 True and False Monkey King with Anti corrosion Treatment for Sleepers

The "black" of oil immersed sleepers comes from their unique processing technology: injecting anti-corrosion oil into the interior of wood fibers through high temperature and high pressure to form a deep anti-corrosion layer. This treatment not only gives the wood a black and shiny appearance, but also gives it the anti-corrosion performance of "both internal and external repair". But there is another type of "disguiser" in the market - "replicas" made by coating anti-corrosion oil on the surface. This type of sleeper, although also black in color, cannot withstand the test like gold-plated copper.

The essential difference between the two processing techniques is comparable to that of "Western medicine infusion" and "skin ointment": the former achieves deep protection through forced infiltration, while the latter is only superficial. The amount of anti-corrosion oil required for brushing and treating each cubic meter of wood is not on the same scale as that required for impregnating wood, and this cost difference is precisely the incentive for some businesses to take risks.

2、 Deadly Gap: Verification from Laboratory to Rail

In the accelerated corrosion experiment in the laboratory, the anti-corrosion layer of oil immersed sleepers remained intact after simulating 30 years of natural erosion, while the protective layer of painted sleepers showed significant peeling after 5 years. This difference is due to changes in the cellular structure of wood - oil immersion treatment forms a eutectic structure between wood fibers and anti-corrosion oil, increasing compressive strength by more than 40%.

3、 Three step identification method: Let 'Li Gui' have nowhere to hide

1. Sectional observation method: Cut the sleepers, observe their cross-sections, and apply only a layer of black on the surface of the sleepers. Oil immersed sleepers will have a black color deeper than 13mm.

2. Drilling inspection method: Take a 10mm diameter drill bit to drill holes on the side of the sleepers. The debris of the oil immersed sleepers is dark brown oil immersed, and the coated material is natural wood colored debris.

3. Knocking for sound recognition: Lightly tap with a hammer, and the oil immersed sleepers will make a dull "thump" sound, while the painted products will present a crisp "click" sound.

In the era of high-speed rail, every sleeper carries the safety burden of millions of passengers. Choosing genuine oil immersed sleepers is not only an economic consideration, but also a reverence for life. The next time you see the shiny black sleepers on the railway tracks, remember: the true safety line is always hidden deep away from the naked eye. This may be the inspiration given by modern industrial civilization - under the ostentatious appearance, only a solid foundation can support the weight of the times.