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Abbreviations used in electroplating specs: MFZn-Ni, MFZn1c, MFZn2-C, MFZn-1S-2, MFZn8-S

A discussion started in 2007 but continuing through 2019


Q. We are a automotive metal stamping company based in Malaysia and Thailand and recently, one of our potential customers in Thailand have asked us for quotations for parts with the finishing spec as MfZn8-S. We know MfZn8-C to be normal zinc plating but we do not understand the significance of the change of the last letter in the code to S. Could someone who understands please enlighten us.

Additionally, does the colour of the plating need to be specified after the code?

Thank you.

Joe Ong
Customer - Kuala Lumpur, Malaysia

? 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,

Ted Mooney, Teds signature
Ted Mooney, P.E. - Pine Beach, New Jersey
Striving to live Aloha

Abbreviations used in Honda plating specs


Q. Regarding Honda's plating spec no. MFZn2-C. What color would the chromate be on this spec? It seems unclear whether it would be clear or yellow chromate.


Robert Bittner
metal stamping manufacturer - Geneva, Ohio

June 22, 2009

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

- Bangkok, Thailand

July 27, 2010

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

Debbie A [last name deleted for privacy by Editor]
- Grand Rapids, Michigan USA

February 14, 2012

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

- Taichung, Taiwan

November 2013

thumbs up signHi 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"  :-)


Ted Mooney, Teds signature
Ted Mooney, P.E. - Pine Beach, New Jersey
Striving to live Aloha


Q. Does anybody know what the plating spec. MFZn-Ni 8-a3-3 is?

John J Colucci
- Waterbury, Connecticut


Q. I'm working in a plating shop in Bekasi, Indonesia. I have a question from my customer about the meaning of the number "2" in symbols MFZn-1S-2. Would you please find the answer or tell me where I can find the answer. Thank You.

Cintadi P. Liauw
Plating shop - Bekasi, Jawa Barat, Indonesia

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 [link by ed. to spec at TechStreet] and JIS H-8625 [link by ed. to spec at TechStreet] or some other spec. Good luck.

Ted Mooney, Teds signature
Ted Mooney, P.E. - Pine Beach, New Jersey
Striving to live Aloha


Q. I am looking for the details on spec ESP-WS-7620 REV. K with surface treatment MFZn-2S


Angie Robinson
Fastener Distributor - Lake Zurich, Illinois, USA

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


Ted Mooney, Teds signature
Ted Mooney, P.E. - Pine Beach, New Jersey
Striving to live Aloha

May 2, 2012

Q. Hi I am Karthik. I am entirely new to plating, so could you help me in describing the following plating specification?

MFZn1c -- what does this means?

Karthik Kanniyappan
- Chennai, India

May 2, 2012

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.


Ted Mooney, Teds signature
Ted Mooney, P.E. - Pine Beach, New Jersey
Striving to live Aloha

February 14, 2013

Q. What does this mean?


Muhammad Khan
- Pakistan, Karachi

February 14, 2013

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.


Ted Mooney, Teds signature
Ted Mooney, P.E. - Pine Beach, New Jersey
Striving to live Aloha

February 16, 2013

Q. Hi, Ted Mooney

Yes, it is Honda Spec.

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

Please explain in detail.


Muhammad Khan
- Karachi, Pakistan

February 17, 2013

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.


Ted Mooney, Teds signature
Ted Mooney, P.E. - Pine Beach, New Jersey
Striving to live Aloha

May 16, 2013

Q. Hi,

I would like to know about "MFZn-5TC" surface coating. If anyone has the answer please let me know.


Shravan Tripathi
- Indore, India

August 30, 2013 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. Dear sir,


Marudhupandian Ganesan
- Chennai, India

August 30, 2013

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.


Ted Mooney, Teds signature
Ted Mooney, P.E. - Pine Beach, New Jersey
Striving to live Aloha

November 21, 2013 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. Good afternoon,

I am from South Africa and have never encountered this specification before: MF Zn Ni T2-C
Could you assist please?

Jade Cupido
Technical Service Analyst - South Africa

April 28, 2014

Q. Hello,

What Honda spec is MFZn2-C defined on?


John Tak
- Cleveland, Ohio, USA

April 28, 2014

A. Answering my own question...

MFZn2-C is defined on Honda HES D2003-05.

How to interpret MFZn2-C (what the M means, what the F means, etc) is defined on Honda HES A3010-05.

Unfortunately, as best I can tell, the "-C" just means "colored chromate" and doesn't indicate clear or yellow.

John Tak [returning]
- Cleveland, Ohio, USA

May 22, 2014

Q. Can I ask what is the meaning of this plating code MFZn 8 Cr3 (the no. "8" and "Cr3")? Thanks in advance.

Enelia Puma
- Sta. Rosa Laguna, Philippines

May 23, 2014

A. Hi Puma ,

'MFZn8Cr3' means:

Zn - Zinc plating
8 - Thickness 8 microns
Cr3 - Trivalent Chromate Passivation


Surya Narayana
Process Engineer - Tumkur , Karnataka , INDIA.

August 14, 2014

Q. I have this spec Plating MFZn8-a3-Cr, and need you to tell me about this. Thanks.

Jose Torres
- Ramos Arizpe Coahuila Mexico

June 9, 2015

Please explain (JIS H 8610)MF Zn1-cb.

Thank you,

METAL FINISHERS - Chennai-Tamil Nadu,India

June 26, 2015

Q. Sir what is MFZn8-3.CF?

Donald Magos
Metal Fabrication - City of Bacoor, Cavite, Philippines

August 5, 2015

Q. I have a print for a part made from P20 (Fin Guide). Dual language print is in English and Chinese and calls out for a surface treatment of MFNiIII or MF Ni III. Does anyone have a guess as to what this may be?

Jeff Hanaway
plating shop owner - Meadville, Pennsylvania

Japanese coating specification MZNFE8-TB meaning?

August 31, 2015

Q. Please let me know the specification that describes and the meaning of the Japanese coating specification MZNFE8-TB. Please let me know where to find this Japanese material coating specification for MZNFE8-TB.

Dennis Lee
Engineer - Wylie, Texas, USA

June 21, 2016


Thickness = ?

Mr. Prudchaya
part automotive - Ayuthaya, Thailand

June 2016

thumbs up signThere are no awards for brevity here, Mr. Prudchaya. My guess is either that there's a typo there and what you wrote doesn't specify a thickness though or that it's a Honda spec. where the 2 means 8 microns. But please don't guess :-)


pic of Ted Mooney
Ted Mooney, P.E. RET - Pine Beach, New Jersey
Striving to live Aloha

June 27, 2016

Q. I received drawings from Japan with treatment MFZnh-C

Reading the forum I discovered that C means Yellow, and Zn means Zinc coating but what does "h" mean?

Or [maybe it's] MFZnII-C - what does "II" mean?

Thank you in advance

Cinthya Y [last name deleted for privacy by Editor]
Product designer - Sao Paulo, Brazil

sidebar2 June 2016

thumbs up sign Misunderstandings are the #1 cause of problems and financial loss in business, Cinthya, and now we've moved on from merely guessing what spec. no. is implied by a cryptic abbreviation, to conjecturing what character(s) might once have been under a smudge mark. You can't make this stuff up, folks :-)

Seriously Cinthya, you can't proceed without getting clarification of what the customer needs.


pic of Ted Mooney
Ted Mooney, P.E. RET - Pine Beach, New Jersey
Striving to live Aloha

Difference between MFZn2C and PFZn8C

June 16, 2017

Q. What is the difference between MFZn2C and PFZn8C? Is there a difference is the plating specifications?

John Bryant
- Opelika, Alabama US

December 19, 2017

A. I work within the Honda organisation and have access to the specs.
I can confirm that MFZn2-C translates as:-
Electroplate, ferrous, Zinc, plating grade2, Coloured chromate.

David Seymour
Honda - Swindon, England

January 18, 2018

Q. What is standard for plating of MFZn8-K ?
I need what are the materials deposited in this plating & their percentage.

Pradip Gaikwad
- Pune, Maharashtra, India

March 6, 2018

Q. Dear sir,
We are Honda supplier and we got a surface treatment for one metal part MFZn.Ni1-B+TB3801
Sir can I get this specification?

Shripad Narayan Limaye
- PUNE, Maharashtra, INDIA

March 8, 2018

A. Shripad,
If it's a Honda specification, the best place to get it would be from Honda themselves.

ray kremer
Ray Kremer
Stellar Solutions, Inc.
supporting advertiser
McHenry, Illinois
stellar solutions banner

July 6, 2018

Q. Hi Sir,

What does it mean "finish-zinc plate to MFZn8S", especially MFZn8S? It is required from General Motors.

Sophie Wei
- Shanghai, China

What does "MFZn8 Colour Cluster" mean?

October 20, 2018

Q. Hi, I am sukhwinder, I found the plating specification of MFZn 8 (Colour Cluster). Please help me.

- Rohtak, Haryana, India

October 2018

A. Hi sukhwinder. Where exactly did you find it? On a GM drawing, a Honda drawing, or where?

I have no idea what "(Colour Cluster)" means, but if we knew where the spec came from we might have a fighting chance.


pic of Ted Mooney
Ted Mooney, P.E. RET - Pine Beach, New Jersey
Striving to live Aloha

August 5, 2019



Ed. note:
Please see letter 35197 for another long list of similar sounding Q&A's about plating specs.

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