The use of wire ropes in the maritime sector is widespread. These ropes, which are used on all sorts of marine vessels, such as ships, large boats, and drilling units, have flexibility, breaking strength, resistance to deformation and bending, anti-corrosion and anti-frictional qualities.
Wire ropes are widely used in mooring, towing, and transporting heavy lifts and other tasks. Wire ropes are subjected to constant wear and tear as a result of their extensive usage. They are exposed to corrosive seawater, dry and heated working temperatures, high and changing pressures/tensions on wires and strands, chafing and internal wear.
To prevent wire ropes from breaking down prematurely, it’s critical to understand onboard maintenance standards such as lubrication. Understanding onboard maintenance standards such as lubrication are essential to avoiding wire rope failure.
Construction of a steel wire rope
Heavy-duty wire ropes are long wires that have been tightly twisted together to form strands. These strands are formed by firmly twisting the core of the wire rope over the wire rope core. The wire rope’s core is composed of a variety of materials, including nylon, hemp, and others.
The quantity of strands and wires in each strand are the main factors that determine the wire rope’s construction. The strand’s placement of wires, kind of lay, and outer and core materials are all determined by the rope’s onboard usage.
How to Use Lubrication to Prevent Rope Corrosion?
Lubrication is especially essential for wire rope wires to avoid corrosion, extend their lifespan, and save from future damage as a result of continuous wear and tear. Regular lubrication is critical. However, marine oils are readily available in large quantities.
Characteristics of Wire Rope Lubricants
• Should not have contaminants that result in degeneration and corrosive reactions
• Be non-emulsifying and water-resistant
• Should not have water grit or chlorine impurities.
• Should have low-quality layering properties.
• Should have the capability of penetrating into the wire’s core.
Why is Re-lubrication required?
During the production of steel wire ropes, lubrication is used to safeguard against corrosion-induced damage. This also helps to avoid excessive wear and tear on the wire ropes. Once loose, wire ropes lose their initial lubrication and begin to “dry up.”
Regular re-lubrication is therefore required to optimize the shelf life of ropes that are subject to usage and storage conditions. At regular intervals, wire rope lubrication should be included in shipboard maintenance charts such as “Planned Maintenance Systems.” Additionally, the type of lubricants that are preferred for each class of wire ropes aboard should be taken into account. (masto)
The most popular synthetic oils include those that are formulated with ‘Synthetic Oil’ as a base. They’re high-performance multi-fits that usually contain lithium-based additives/solvents for optimum viscosity and thickness and anti-corrosive substances with rust preventives and water resistance. Wire ropes coated in special lubricants are pushed into place by pressurized lubricators. (https://masto.no/products/wire-rope-lubricator/)
In conclusion, there are many excellent lubricants for wire rope applications, depending on the machinery’s overall design and composition. The proper lubrication for wire ropes on ships is just as important as planned maintenance.