Dacromet screws are the screw with dacromet coating finished. Dacromet is the leading inorganic coating specified by automotive companies worldwide and is a proven coating system in many industries. A water-based, VOC compliant coating, dacromet is comprised mainly of overlapping zinc and aluminum flake in an inorganic binder.
Four Way Corrosion Protection
- Barrier Protection: Overlapping zinc and aluminum flakes provide an excellent barrier between the steel substrate and the corrosive media.
- Galvanic Action: Zinc corrodes to protect steel.
- Passivization: Metal oxides slow down the corrosion reaction of zinc and steel to provide 3 times greater corrosion protection than pure zinc.
- Self-Repairing: Zinc oxides and carbonates migrate to the damaged area of the coating to actively repair the coating and restore barrier protection.
Advantages of using a Dacromet coating
- It is a non-electrolytic thin-layer, which can be self-lubricated or not
- It has a high corrosion resistance, with the following for each type:
DACROMET® 320/500 Grade ‘A’ 24g/m2
>240 hours without white rust
>600 hours without red rust
DACROMET® 320/500 Grade ‘B’ 36g/m2
>240 hours without white rust
>1000 hours without red rust - It has the following controlled friction coefficients:
DACROMET® 320 + PLUS® or DACROLUB® topcoat µ from 0,06 to 0,18
DACROMET® 500 µ = 0,15 ± 0,03 (EN ISO 16047) without topcoat - No hydrogen embrittlement will occur
- It exhibits excellent behaviour when assembling and multi-tightening (with lubricated topcoat)
- It has good resistance to mechanical damage (trial method D24 1312) and chemical attack (trial VDA 621-412)
- It is not affected by exposure to temperatures up to 300°C
- It is a paintable coating
- The electrical conductibility of Dacromet coatings meet most applications
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About us
Yuhuang Electronics Technology Co., Ltd. – Manufacturer, supplier and exporter of screws. Yuhuang offers a wide selection of specialized screws. Whether its indoor or outdoor applications, hardwoods or softwoods. Including machine screw, self tapping screws, captive screw, sealing screws, set screw, thumb screw, sems screw, brass screws, stainless steel screws, security screws and more. Yuhuang is well known for the capabilities to manufacture custom screws. Our highly skilled team will work closely with customers to provide solutions.
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