Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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Fluorocarbon Coating Q&As, RFQs, Problems & Solutions

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RFQ: Hello,

I am looking for someone that can perform this spec on steel stampings. GM6046M Fluorocarbon. E-mail me.

Thanks,

Dan L [last name deleted for privacy by Editor]
a spring manufacturer - Lombard, Illinois
2003

Ed. note: Sorry, this RFQ is old & outdated, so contact info is no longer available. However, if you feel that something technical should be said in reply, please post it; no public commercial suggestions please ( huh? why?)

RFQ: Looking for a a supplier to handle 1500 tons of product per year of a molybdenum disulfide coating per EM6340.

Nestor F [last name deleted for privacy by Editor]
- Blue Ash, Ohio
2003

RFQ: I HAVE A REQUIREMENT TO FLUOROCARBON COAT TO GM6046M/18T336 PROCESS, METRIC STUDS. 10 pieces, M14 X 127 MM. CAN YOU SUPPLY A VENDOR NAME?

DALE L [last name deleted for privacy by Editor]
MATERIALS MGR. - SURREY, B.C., CANADA
2004

Fluorocarbon Coatings vs. Hot Dip Galvanizing

Q. Do you have any service life data comparing Fluorocarbon coatings vs. Hot dipped galvanized expected life? I'm looking at replacing electric utility pole line hardware (aerial steel products) with fluorocarbon coated products. The "American Galvanizers Association" publishes a "Service Life Chart for Hot-Dipped Galvanized Coatings". It indicates a 40-50+ year expectation. I cannot locate any data on Fluorocarbon coatings. This is important as we are looking at using higher strength steel and are concerned about hydrogen embrittlement issues.

Ken McBrayer
sales representative - Charlotte, North Carolina USA
July 26, 2010

A. Hi, Ken. The difference, and probably the reason you are having trouble finding comparative data, is that galvanizing is a cathodic protection coating whereas the fluorocarbon is a barrier layer coating. Although the best fluorocarbon coatings may indeed last 40 years, it's no big deal if a galvanized coating gets scratched, but what happens if the coating is scratched through and steel gets exposed in year one?

Regards,

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

A. On some offshore platforms a combination of a galvanic aluminium layer covered with a fluorcarbon coating is used. In salt spray tests this combination lasts more than 10.000 hours, in tidelands for decades without rust.

Klaus-Martin Hentrich
- Engelskirchen, NRW, Germany

A. Remember that fluorocarbon coatings are very efficient electrical insulators. This may be important in your application.

Geoff Smith
Hampshire, England

? Sir: What is the chemistry (heat) of your high strength steel? Your worry about galvanizing high strength steel may not be warranted.

Dr. Thomas H. Cook
Galvanizing Consultant - Hot Springs, South Dakota, USA

Solid Film Lubricants Vs Fluorocarbon Coating Process

Q. I understand that Application methods by comparing Dry(Solid) Film Coating and Fluorocarbon coating are the same, using Dip or Spray.

My questions are,

1. Are they actually the same thing? Properties? Performance? Assuming both are using PTFE as solid lubricant.

2. SFL is thermally cured, how about Fluorocarbon?

3. Can a company that specialized in Fluorocarbon coating also be able to do a Solid Film Lubricant coating? Are they even using the same type of equipment?

Ray Poh
- Singapore
June 19, 2013

A. Hi Ray,

There are a few types of Dry Film Lubricants (DFL), based on various technologies. There are the PTFE based ones, but also DFL based on Molybdenum disulfide and graphite. These technologies are all very different, although their function is the same in that they reduce the friction between mating surfaces.

A company that applies a fluorocarbon or PTFE based lubricant may not be able to (or may be unwilling to) process other DFL coatings due too the possibility of cross-contamination.

Brian Terry
Aerospace - Yeovil, Somerset, UK

Hi Thank you very much for your answer Brian Terry.

Ray Poh [returning]
- Singapore

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