Surface treatment is the key to choose the right!

Slewing bearings, as the core “joints” of construction machinery, wind power equipment, port machinery and other fields, turntable bearings surface treatment is like putting on a protective battle suit for it. In the face of galvanized, painted, blackened, sandblasted, galvanized nickel, ordinary antirust oil and other options, how to accurately match? The key lies in understanding the core requirements of the application area!

Severe corrosive environments (e.g. harbor machinery, offshore platforms, chemical equipment):

Prefer zinc-nickel: This is the leader in protection! The zinc-nickel alloy coating provides excellent resistance to salt spray and chemical corrosion, far exceeding ordinary galvanizing, and is the armor of choice against seawater, acid spray and other erosion.

Second choice hot-dip galvanizing: thicker coating provides good base protection, cost-effective for moderately corrosive environments.

Outdoor conventional environments (e.g. outside construction machinery, wind turbine towers):

Painting (especially high quality anticorrosion paint): aesthetically pleasing, available in a wide range of colors, provides good weathering and some corrosion protection. Paint film quality and adhesion must be ensured. Sandblasting is an essential pretreatment before painting, which thoroughly cleans the surface, increases roughness and greatly improves film adhesion and durability.

Indoor or dry, low-corrosion environments (e.g. partially automated equipment, light machinery):

Blackening (bluing): Lower cost, mainly provides basic rust prevention and aesthetic black appearance, but less protective, suitable for occasions with low corrosion requirements.

General Rust Preventive Oils: Typically used only for short-term storage or transportation protection, not a long-term solution.

Abrasion resistance or special appearance is required:

Sandblasting: In addition to being a pretreatment, it can also be used on its own to obtain a uniform matte clean surface that adds a certain amount of abrasion resistance (especially in conjunction with subsequent treatments).

The golden rule of choice:

Look at the environment: Corrosivity is the primary consideration! For harsh environments, always choose galvanized nickel or a good quality paint.

Cost & Longevity: For long term reliable protection, galvanized nickel may be a slightly higher initial investment, but the whole life cost may be lower.

Look for Appearance: Spray paint offers a wide range of color options.

Pre-treatment should not be skipped: sandblasting is the cornerstone of successful painting, plating and other processes.

Choosing the right “suit” for your slewing bearing is a solid foundation for reliable operation and longevity. Clearly demand, according to the need to match, can get twice the result with half the effort!