Metal finishing Q&As since 1989

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Best Coating Material

Dear Friends,

1. What is the industrially used coating materials for the following

-Wear Resistant Application
-Corrosion Resistant Application
-Aesthetic Appearance

2. Is that Nickel Coating is applicable for all?

Karthick Venkatesh
Researcher - Salem, Tamilnadu, India
April 6, 2009

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Yes, Karthick. Nickel meets those requirements. But it is difficult or impossible to say what is the "best" coating without a pretty exhaustive process and highly detailed conditions.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
April 14 , 2009

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First of two simultaneous responses --

Electroless nickel is harder and more wear resistant than most other nickel plate. There also is a difference in properties between different EN types.

James Watts
- Navarre, Florida
April 21, 2009

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Second of two simultaneous responses --

Hard Chrome Plating is the best suitable Coating material for your applications. Hard Chrome is having excellent wear resistance, high Hardness and high corrosion resistance compared to Nickel Plating. You can get good brightness by using Secondary Organic Catalyst Hard Chrome plating solutions.

R Adiga
- Bangalore, India
April 22, 2009

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Thanks, R, there is indeed a lot to be said for hard chrome plating. But more corrosion resistant than electroless nickel? Sorry, that's not correct.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
April 23, 2009

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First of two simultaneous responses -- April 24, 2009

Hi Karthick,

why you want only nickel plating?
if you are doing teflon based coating, like PTFE or Powder coating (Rilsan)or Zinc flake coatings (Geomet & dacrol) you will solve your problems.

Kannan Boopathi
- Salem, Tamil Nadu

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Second of two simultaneous responses --

Yes Mr.Ted, you are right. I quoted only against Electro Nickel Plating. Electroless Nickel(High Phosphorus) having maximum corrosion resistance but with a lower Aesthetic appearance.

R Adiga
- Bangalore, India
April 24, 2009

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If you are talking wear resistance, PVD coatings -- mostly metal nitrides and carbo-nitrides -- greatly outperform wet platings. PVD coatings are also used for decorative purposes on a wide variety of products, including faucets and door hardware. The coatings are thin and likely to have pinholes down to the substrate, so don't provide much in the way on corrosion resistance. I'm working on that problem, looking at post-deposition processes to fill in the holes in the coating.

Jim Treglio - scwineryreview.com
PVD Consultant & Wine Lover - San Diego,
California
April 30, 2009