Dear railway infrastructure construction monster, bridge construction tycoon, and friends in the family who have mines and need to lay sleepers, let's talk about it today – how to select a "anti-manufacturing" anti-corrosion sleeper! After all, it is necessary to carry the train and withstand the rain, so it is not suitable to let you experience the stimulus of "railway collapse" in minutes.
From the material selection and production process of anti-corrosion sleepers, we know their root causes, sources and details, and then we can select the best for use.
When pine trees are transported out of the forest farm, is it a "little fresh meat" with excessive water content and directly laid with rails? Split into "emoticons pack" in minutes! Therefore, the first step is to make it "lie flat" in the sun - stack the wood into ventilating piles, blow and sun for a period of time, and control the water content only when the water evaporates to a stable value.
The next step is "cosmetic surgery" - saw cutting. Cut the log to standard size with a huge sawing machine, and then make dense "scars" on the surface with a scoring machine. Don't worry, this is to open "VIP channel" for anti-corrosive oil! Without these nicks, the oil cannot penetrate into the depth of the wood, and the anti-corrosion effect is directly folded.
The last step is "soul filling" - boiling hot oil. Insert the carved sleepers into the huge pressure tank, vacuum first, then pour hot anti-corrosive oil, and finally pressurize to "suspected wood". Under high pressure, the oil is forced into the wood like a "overbearing president", and the oil immersion depth directly exceeds 13mm! The treated pine wood turns dark from light yellow, which leaves a "blacked version of Iron Man", and the anti-corrosion capacity is directly filled.
Analyzing the above production process, we can summarize several guidelines for procurement of refuge pits——
Color: High-quality oil-immersed sleepers are even dark black, bright and dark; If the color is mottled and the reflection is obvious, the oil may not penetrate evenly.
Section inspection: This is also the most direct way to inspect whether the sleeper is subject to oil immersion treatment and the depth of oil immersion. Select one end for cutting inspection. If there is obvious internal seepage of anti-corrosive oil on the end face, i.e. the oil-immersed sleeper. If there is no internal seepage or the penetration is very shallow, it may be the sleeper coated with anti-corrosive oil.
Test weight: because of the impregnation treatment, the wood contains a certain amount of preservative oil, which is certainly much heavier than the painted type of sleeper.
Check certification: Look at GB9221-88 or TB/T3172-2007 standards. ISO certified manufacturers are more reliable. For example, Qingdao Tiehan Wood Corrosion Protection Co., Ltd. has rich product lines and supports personalized customization according to engineering requirements. This flexibility is especially critical when dealing with complex construction scenes, and can effectively meet the specific requirements of different projects.
So why is it important to distinguish between "oil immersion" and "brushing"?
Brushing anti-corrosive oil is like applying sunscreen to wood. The surface is bright but peels off once it is rubbed. It will be rotten after a long time; Immersion treatment is to make "whole-body water light needle" for wood. The oil directly penetrates into the depth of 13mm to form a 360-degree protective layer without dead corner. Even if the surface is rubbed down a little by the wind and rain, the deep oil can still carry fungus and insect bites.
A qualified anti-corrosive sleeper with a service life of dozens of years, bearing a pressure of more than 20 tons per day, and being exposed to heavy rain, sun and insects. However, people never complain, and they can be called "railway model" by lying silently under the rail as a "stepping stone". Therefore, don't be stingy when purchasing. A good choice is not only responsible for the project, but also for the "workplace dignity" of sleepers!
