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Views: 0 Author: Site Editor Publish Time: 2026-03-13 Origin: Site
During elevator operation, steel wire ropes may develop rust and metal powder residue, often referred to as rust powder or flying powder. These problems are not only a sign of deterioration, but also a serious threat to elevator safety, service life, and traction performance. Understanding the causes of elevator steel wire rope corrosion and taking the right countermeasures is essential for safe and reliable elevator operation.
One of the main reasons for rust powder on elevator steel wire rope is corrosion inside the rope structure. The rope core plays a critical role in the performance of steel wire rope. It supports the strands, helps the rope maintain its shape and roundness, and allows lubricant to form a protective oil film on the surface of the strands and wires. This oil film fills the gaps between wires, reduces friction, and helps prevent corrosion.
However, in real working conditions, elevator wire ropes are often exposed to unfavorable environments. During installation, the rope may come into contact with water. In long-term service, the rope may also operate in a humid elevator shaft. When air conditioning systems are installed in the shaft, temperature differences and moisture can create a warm and damp environment, making it easier for water to penetrate the rope core.
Because water is not compatible with lubricating oil, moisture inside the rope core can gradually displace the lubricant. Under continuous rope pressure, the internal oil may be squeezed out and mixed with iron particles and dust, forming oily sludge. This sludge may later fall off from the rope surface, leaving the outer wires dry and lacking lubrication.
Once the rope core loses lubrication, it may become dry and shrink. As a result, the rope strands are subjected to stronger compression under tensile load, leading to strand indentation and deformation. This condition increases wear between strands and reduces the overall service life of the rope.
At the same time, friction between individual wires becomes more severe. The wire surfaces begin to wear, producing fine iron powder. When this metal powder is exposed to moisture and air, it oxidizes and turns into rust powder. Therefore, rust powder on elevator steel wire rope is often a visible sign of internal corrosion, poor lubrication, and progressive mechanical damage.
Corrosion has a serious impact on the mechanical properties of elevator steel wire rope. It not only increases wear, but also weakens the wire structure itself. In severe cases, corrosion may cause the rope to become brittle and lead to a sudden avalanche-type brittle fracture. This kind of failure poses a major safety hazard to elevator operation.
Once a steel wire rope has become seriously weakened by rust, continued use is extremely dangerous. In such cases, the rope should be replaced immediately to ensure safe elevator performance.
Corrosion issues are not limited to the steel wire rope alone. The traction sheave can also be affected. During elevator operation, the carburized layer in the traction sheave groove may wear under constant friction with the rope. This wear can produce fine iron particles, which then oxidize and form rust powder.
As rust powder accumulates, it may further affect the contact condition between the steel wire rope and the traction sheave groove, reducing traction performance and increasing the risk of abnormal wear. This can ultimately influence the safety and stability of elevator operation.
Severe corrosion of elevator steel wire rope and traction sheave grooves can cause major safety risks. If heavy rusting appears, the rope must be replaced without delay. Ignoring the problem, or simply performing basic surface rust removal and continuing to use the rope, is highly unsafe.
Maintenance companies should clearly explain the seriousness of the issue to the building owner or equipment user. Corroded steel wire rope is not just a cosmetic problem. It is a warning sign of structural deterioration that may lead to unexpected failure.
To reduce corrosion and improve the service life of elevator steel wire rope, the following measures are recommended:
Keep the elevator shaft as dry as possible. Moisture, condensation, and poor ventilation should be minimized, especially in shafts with air conditioning systems or high humidity.
During transport, storage, and installation, the rope should be protected from rainwater, surface moisture, and contamination.
Regular lubrication is essential for preserving the protective oil film on the rope surface and within the rope core. Proper lubrication reduces friction, prevents drying of the core, and lowers the risk of corrosion.
If rust powder or abnormal metal dust is found, maintenance personnel should inspect the rope immediately to determine whether the issue is caused by corrosion, wear, lubrication failure, or traction sheave groove damage.
Once serious corrosion, strand deformation, or embrittlement is found, the elevator steel wire rope should be replaced promptly instead of being reused after simple cleaning.
Elevator steel wire rope corrosion is a serious issue that can affect lubrication, increase wear, reduce mechanical strength, and even lead to brittle fracture. Moisture intrusion, poor lubrication, internal wear, and traction sheave groove damage are all common causes of rust powder formation. To ensure elevator safety, corrosion problems must be taken seriously, inspected in time, and resolved through proper maintenance and timely rope replacement.
