Dave, thanks for the questions.
Yes, the Hellas were a dead on match for the rest of the drum hardware and the Artist Die Cast hoops that were on the Artist Bronze. They also match a couple of triple flange Sonor hoops I got from Aaron Edgar. And I might add that it is a beautiful finish.
As to the black nickel question. I am not aware of Sonor currently using it.
To you last comment/question: if given the option, I would have opted for chrome. However having just done a quick review, I think I just changed my mind. Here is what I have found verbatim:
Example A:
Yes, ruthenium is used in metal plating for both decorative and industrial applications, providing a hard, durable, wear-resistant, and corrosion-resistant finish. It is applied to jewelry to improve its appearance and durability, especially as an alloy with platinum and palladium, and in electronics for components and contacts. Ruthenium plating can create a range of finishes from light gray-white to dark, smooth black, depending on the plating solution used.
Applications of Ruthenium Plating
Jewelry: Plating with ruthenium enhances the hardness and scratch resistance of jewelry, giving sterling silver, gold, and platinum a beautiful, durable finish, according to Sharretts Plating. It can also provide a unique dark gray or black color as an alternative to rhodium or black nickel plating.
Electronics: Ruthenium plating is ideal for electronic components and electrical contacts due to its hardness, wear resistance, and chemical stability.
Industrial Uses: Its excellent wear resistance makes it suitable for aerospace applications and as a catalyst. It can be a substitute for palladium plating, offering similar benefits with potential cost advantages.
Benefits of Ruthenium Plating
Hardness and Durability: It significantly increases the wear resistance and hardness of the underlying substrate.
Corrosion Protection: Ruthenium plating offers excellent protection against corrosion and tarnishing.
Decorative Finishes: It can produce a wide range of attractive finishes, from a mirror-like luster to a sleek, pure black, making it a popular choice for decorative items like watches and enhanced coins.
Chemical Stability: Ruthenium is unaffected by many chemicals, making it a very stable and inert finish.
Example B:
Ruthenium and black chrome are two distinct materials used for different types of metallic coatings. While both can produce a dark, hard-wearing finish, they are made from different metals and have different properties.
What is ruthenium?
A platinum-group metal: Ruthenium is a rare, transition metal in the same family as platinum and rhodium.
Properties: As a coating, ruthenium is exceptionally hard, resistant to scratching, and durable. It is chemically inert and highly resistant to corrosion.
Appearance: Ruthenium finishes can range from a light, gray-white to a medium-to-dark gray or black, depending on the process. It often has a sleek, subtle shine.
Applications: It is often used in high-end applications like watches and jewelry to create a durable and scratch-resistant dark finish. It is also valuable in the electronics and aerospace industries.
What is black chrome?
A chromium-based finish: Black chrome is a type of electroplating that uses a layer of chromium, often with additives, to produce a dark finish.
Properties: It is known for its aesthetic appeal, corrosion resistance, and durability. The finish can be lustrous, semi-lustrous, or matte.
Appearance: Depending on the plating process, black chrome is a dark, lustrous finish that can vary from a dull dark gray to a reflective, nearly black sheen.
Applications: Black chrome is widely used in the automotive industry for trim and wheels, architectural hardware, and optical instruments.