"Meanings of plating spec abbreviations: MFZn-Ni, MFZn1c, MFZn2-C, MFZn-1S-2, MFZn8-S, etc."

A. Kanhaiya,
Maybe you've gotten the idea from the replies to the older similar questions below, but the best thing to do in a situation like this is go back to the CUSTOMER, ask what spec or standard the plating grade comes from, if they can give you a copy of that spec or standard, and if not where you can get it from.

A proper drawing should have the relevant spec or standard listed right on there.

A. Hi Muhammad. No, they are not the same.
Thank you for writing in American english, but I think we are having language difficulties, because several people have repeatedly tried to make the same two points.

1. Words like "MFZnIII" mean nothing at all until we know what spec authority we are referencing. "III" could mean "trivalent chromate", it could mean "level 3 inspection required", it could mean "for severe exposure" as opposed to for mild or moderate exposure, Only after we say, for example, 'per ABC Automotive Company plating specification XYZ987' does it mean anything.
2. Quoting something, let alone trying to supply it, without the specification on hand is madness. You have to obtain the spec. Either your customer supplies the spec, or they tell you where to get it.

Luck & Regards,

? Hi Joe. You've moved on to the second problem of what does "-S" mean ...

But you've skipped over the first problem of what does "MFZn8" mean? Although it probably means 8 microns of Zinc plating, does it imply "per ASTM B-633" or "DIN xxxx" or "ISO xxxx" or "JIS xxxx" or "Honda xxxx", etc. Numerous specs may have "MFZn8", and some may have an "-S" ... but complying with one doesn't necessarily mean you complied with the spec. that the customer intended :-(

Luck & Regards,

A. Per your question regarding MFZn2-C, "C" means Yellow passivation.
B means Blue passivation,
C means Yellow passivation and
K means Black passivation

? I think C may refer to CLEAR and K may refer to Black? Be happy to hear from someone who KNOWS!

A. C means the Zn plating color is yellow, and B means Bright color.

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November 2013

Hi all. I'd bet that the answer is right within the spec and the way to know is to read the spec. I hope people are not quoting & plating to specs they don't even have -- but seeing so many inquiries here, there seems little doubt that people are doing just that. I'd love to see the certs:

"We hereby certify that these parts have been plated in full accordance with internet rumors about what that spec might say"  :-)

Regards,

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

A. Hi John. Apparently "MF" means a ferrous substrate in lots of different Japanese specs; "Zn-Ni" means zinc-nickel plating, "8" probably means 8 micron plating thickness. "a3-3" is probably some description of the chromating requirement but I'm not sure.

Hello Cintadi. It has the sound of a JIS spec for zinc plating plus chromating on steel to me,

These letters and numbers are not specifications! They are acronyms used within a specification. I would inquire of these customers if they are referring to Japanese specifications JIS H-8610 [affil. link to spec at Techstreet] and JIS H-8625 [affil. link to spec at Techstreet] or some other spec. Good luck.

A. Hi Angie. According to an on-line list of specs maintained by epiplating.com, I believe that one is a Mitsubishi Motors spec for zinc plating on a steel substrate. Good luck.

Regards,

A. Hi Karthik.

Where did you get that spec? Did it come from a Honda drawing? If not, is it reasonable to think from the circumstances where you found it that it is a Honda spec? If it came from Honda, you get the spec from your Honda buyer. Good luck.

Regards,

A. Hi Muhammad. It sounds like zinc-nickel alloy plating. Please put it into context: where did you hear it?

Most people seem to think it's a Honda spec, so if you have no reason to believe otherwise, then you probably ought to contact Honda and get the spec. You cannot offer plating to a spec. without having the spec. in hand, so finding out what the acronyms stand for isn't the whole answer anyway. Good luck.

Regards,

Q. Hi, Ted Mooney

Yes, it is Honda Spec.

MFZnNi2-B
This is Zinc alloy plating (Ni is 6 ~ 10%)
Thickness is 8 Microns min and Bright in colour

Please explain in detail.

Thanks

A. Hi cousin. Sorry, but we might be having some language difficulties. You've told us this is a Honda spec. for Zn-Ni plating with 6-10% nickel, a minimum of 8 microns in thickness, and must be bright in color. So I don't quite understand what you mean by asking us to tell you "what does it mean?" :-)

If you are asking us to put the spec on line or email it to you, sorry but no one is allowed to do that except your Honda buyer and perhaps specification services which have licensed that right from Honda. You must contact your Honda buyer and get their specs from them. Good luck.

Regards,

A. Hi Marudhupandian.

I hope this isn't too confusing, but if I were to ask you to tell me about "type 1 class 2" plating, you would respond that it is a shorthand within a specification, and will mean different things depending on what specification I'm talking about, and I'd need to find out the specification number first.

While we might assume that MFZN5-C means 5 microns of zinc plating with yellow chromate, that code is a shorthand within a specification (perhaps JIS H-8610 and JIS H-8625) but you must find out what specification number it refers to and get a copy of it, because there is really nothing to prevent a given manufacturer from using that acronym/abbreviation for something different in a different spec. Good luck.

Regards,