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topic 44399

What is MKS 720 COATING


A discussion started in 2007 but continuing through 2018

2007

Q. We want to know what is MKS 720 coating. Is it equivalent to Dacromet 310 or Geomet 720?

Sanjay Chitlangia
fasteners manufacturer - Delhi, India


August 25, 2014

A. MKS Stands for Micro layer Korosion Systeme - a brand of M/s Doerken MKS, manufacturers of DELTA MKS systems. It is neither Dacromet nor Geomet.

Sriram Vangal
- Pune, Maharashtra, India



What is Delta MKS 9000 Coating

October 6, 2017

Q. Is Delta MKS 9000 a Dacromet or Geomet coating?

Anthony Heno
- Pensacola Florida, USA


October 2017

A. Hi Anthony. Sriram's answer still pertains. It is neither Dacromet nor Geomet, but a competitive product. It is a lamellar zinc dip-spin coating which is free of hexavalent Cr, but since it's not identical to Dacromet or Geomet, only the specifier can decide whether it's equivalent enough for their purposes.

While that may sound like ducking the question, consider a day-to-day example: is Coke 'equivalent' to Pepsi? To Diet Pepsi? To Diet Seven Up? To Orange Juice? Nobody can offer a firm border for 'equivalent'; there is no answer.

Regards,

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



September 26, 2018

Q. I have a wide range of fasteners (hex bolts, washers, screw) that are zinc electroplated, approximately 3 million pieces. Do the parts need to be stripped in order to be dip spun with Geomet 720?

Matt Sulimowski
- Glendale Heights, Illinois USA


September 2018

A. Hi Matt. I would say "probably" for 3 reasons.

1. Adhesion may not be good enough;
2. sufficient clearance may not be available for both coatings on small screw threads; and
3. the old hardware might have hexavalent chromates on it, which would likely be a problem since the new coating has been specified as hex-free.

Regards,

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



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