Technology

NanoChrome: chrome plating reinforced with detonation nanodiamonds

A diamond-bearing additive — ultradispersed diamond cores in an X-ray-amorphous carbon shell — is introduced into the chrome electrolyte. The particles embed into the coating, refining the grain and densifying the structure. Protected by RU patent No. 2404294.

Coating properties

up to 1400 kg/mm²Microhardness before heat treatment; 1200–1250 kg/mm² after HT. RU patent No. 2404294

×1.4–2.6Wear resistance vs. chrome without diamond additive (a 40–160% increase). RU patent No. 2404294

×2–33Corrosion resistance; 4.2× in a typical coating example. RU patent No. 2404294

1000–1200 HVHardness at standard deposition modes (conventional chrome: 800–1100 HV). Company data

Crack-freeFine-grained dense structure without the crack network of conventional hard chrome. Company data

RestorationRestores worn part surfaces back to drawing dimensions. Company data

Coating microstructure under electron microscope

Coating microstructure and surface scans from company materials

Value ranges depend on additive concentration, deposition modes and heat treatment. Exact parameters for your part are selected based on trial coating.

Independent testing

We publish only results confirmed by test reports of testing organizations.

TsNIIMash, 2006

Report No. 14 of 26.09.2006. R18 steel taps with a 7 µm chrome-diamond coating, thread cutting in grade 20 steel: tool service life increased 4.9 times.

VNIIZhT, 2022

Testing on railway wheel rim specimens (GOST 10791-2011), MI-1 friction machine, 60,000 cycles: wheel specimen wear resistance +18%, total friction pair wear −11%, rolling contact fatigue resistance +5%. No increase in rail specimen wear.

Patents and R&D

RU patent No. 2404294

"Composite metal-diamond coating, method of its production, electrolyte, diamond-bearing electrolyte additive and method of its production". Filed 29.11.2007, published 20.11.2010. Holders: Almazny Center CJSC and RAM LLC.

Utility model No. 81781, invention No. 2533280

"Slide valve" and "Downhole sucker rod pump with a short piston" — the patent base of the group's oilfield business.

New filings

Chrome-nanodiamond coating of railway wheel forging dies (microhardness up to 1200 kg/mm² after heat treatment). A nanodiamond cosmetic composition — a research direction. Applications pending.