Industry knowledge
Why do railway bolts corrode?
Railway bolts are fasteners consisting of a threaded bolt, a lug or nut, and a locking washer. Their function is to buckle the rail to the sleeper and fix the gauge between the two rails.
Ballasted track bolts generally use standing bolts. A part of the threaded spike is fixed in the concrete sleeper in advance, and the spring bar is pressed and fixed to the spike by the nut.
Compared with embedded casing bolts, standing bolts have more parts exposed to the outside and are more susceptible to rust due to external factors. Studies have shown that atmospheric composition has a great influence on the corrosion rate. When there is salt spray, sulfur dioxide, hydrogen sulfide and dust in the atmosphere, the metal reacts with it on the surface to generate corresponding compounds, causing chemical corrosion to varying degrees. If it encounters rain, electrochemical corrosion will also occur; in addition, corrosion from soil, organisms, etc. will also exist.
In addition to rail bolts, GNEE RAIL also provides railway rail products of various specifications, which are widely used in railway lines and industrial tracks of different grades. All rails are produced strictly in accordance with international standards, with high strength and good wear resistance, ensuring smooth and safe train operation.
