Zinc flake is a non-electrolytic plating process which offers very high corrosion and chemical resistance. As a result, there is a low risk of hydrogen embrittlement which makes it particularly suitable for fasteners with a tensile strength greater than 320 HV.
Some of the most common finishes are shown below however there are many different systems available.
Contact us if you don't see the finish you are looking for.
|Finish||Thickness||White rust||Red rust||Appearance||Typical applications|
|Dacromet® 320/500 Grade A*||>240 hours||>600 hours||Silver|
|Geomet® 500 A||6 microns||>600 hours||Silver|
|Geomet® 500 B||8 microns||>1000 hours||Silver|
|Delta®-Tone and Seal||8 to 12 Microns||480 hours||Various colours|
|Delta Protekt®||8 to 12 Microns||840 hours||Various colours|
|Magni 565®||13 Microns||480 hours||1000 hours||Various colours|
|Magni 577®||12 to 20 Microns||480 hours||1000 hours||Black|
|Zintek® + Techseal®||8 to 12 microns||240 hours||1000 hours||Various colours|
*Dacromet® may contain Cr6+.
Delta®-Tone & Delta Protekt® are tradenames of Dörken MKS.
Dacromet® and Geomet® are tradenames of NOF Metal Coatings.
Magni 565® is a tradename of Magni Group.
Zintek® and Techseal® are trademarks of Atotech.
Performance results are approximate only and are based on laboratory salt spray tests.