Metal finishing Q&As since 1989
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Zintec vs. zinc electroplated CRCA steel
Q. What is the difference between Zintec & CRCA with zinc plating?
* Whether both are equivalent/any distinct difference?
* Which is more corrosion resistant for manufacturing racks (internal applications)?
* Is the CRCA with zinc plating a replacement option for zintec sheets?
Please suggest with more details on this subject.
- cochin Kerala India
May 27, 2021
A. Hi Shivil. "Zintec" was a 1949 trademark, since abandoned, of British Steel for their zinc plated sheet. So at this point whether you say "zintec" or "zinc plated sheet steel" you are describing the same thing.
But the real issue is that neither is a specification -- they are both just very loose slang: those phrases don't describe the thickness of the plating, its post-treatment, and certainly not its corrosion resistance.
You must find an actual standard/specification and require compliance with it.
Luck & Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
June 2021
Q. Thanks for the feedback.
So Zintec is a trade name for pre treated steel with Zn.
And Steel post treated with Zn is different from zintec in terms of process, plating thickness, corrosion resistance, etc.
Please correct me if my understanding is wrong.
- cochin Kerala India
June 7, 2021
A. Sorry, you have indeed misinterpreted what I tried to say. "Zintec" and "zinc plating" are the same thing -- but neither phrase is a proper "standard" or "specification" because neither specifies the plating thickness, the corrosion resistance, or any other important parameter. Both terms are similar to "car" or "house" or "food" or "radio" -- the terms are so loose they do not constitute a useful requirement. You must search ISO standards, or ASTM standards, or Indian Standards, etc., and refer to a specification/standard that requires some particular thickness, some particular amount of corrosion resistance, etc., or there is simply no lower limit to the poor quality you may receive.
Luck & Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
June 2021
A. Atotech licenses a process by the name of Zintek, which is a dip-spin coating competitive with Metal Coatings International (Nippon Paints), Magni, Doerken, Yuken, etc. It is much more expensive and much more corrosion-resistant than zinc electroplate. You pays your money and you takes your choice.
Tom Rochester
CTO - Jackson, Michigan, USA
Plating Systems & Technologies, Inc.
June 11, 2021
June 2021
Thanks for telling us this because Shivil should recognize this as an additional possible cause of further confusion. But the fact remains that Zintec (with a "c") is still a very widely used word, as Google reveals, and which now generically means zinc electroplated sheet steel -- all the more reinforcement that we need to specify things by accordance with standards, not loose-meaning words or phrases :-)
Luck & Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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