Cobalt Alloy Coated Fasteners

Cobalt Alloy Coated Fasteners are highly specialized products designed to protect steel substrates in the most aggressive environments. The coating, often a Nickel-Cobalt (Ni-Co) or Zinc-Cobalt (Zn-Co) alloy, is applied via electroplating to impart exceptional resistance against corrosion, wear, and galling. Crucially, coatings like Nickel-Cobalt act as an effective hydrogen embrittlement barrier, making these high corrosion resistance coating fasteners ideal for high-strength steel used in critical applications like offshore oil and gas. Zeron Fastners is a reliable supplier and manufacturer in India, providing a range of these highly protective cobalt alloy coated bolts, studs, and nuts.

Related Products

Zinc-Cobalt Plated Bolts Nickel-Cobalt Plated Studs Cobalt Alloy Coated Nuts Anti-Galling Fasteners Cadmium-Free Coated Fasteners Cobalt Alloy Screws
Cobalt Alloy Coating 336

Cobalt Alloy Coating Chemical Composition

Element Coating Composition
Nickel (Ni) 50.0 - 90.0
Cobalt (Co) 10.0 - 50.0
Iron (Fe) Trace max
Other Elements Balance

Cobalt Alloy Coating Mechanical Properties

Property Value
Coating Thickness 8 - 50 µm
Hardness 300 - 750 HV
Salt Spray Resistance 1000+ hours (Red Rust)
Ductility Uniform and Ductile
Hydrogen Barrier Excellent

Features Product

Duplex UNS S32205 Tees Duplex UNS S32750 Stud Bolts Inconel 625 Flanges Hastelloy C276 Washers SS 316L Couplings

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