This process finishes based on zinc mikrolamel was developed by Magni Group Inc.. in the USA and its use is today worldwide. This is the replacement for the popular finish is named Dorrit.
Great 565 It is entirely free from chromium and consists of the inorganic, zinc-rich bottom layer B46 and B18 of the upper organic layer containing aluminum. This technology offers advantages, both sacred, and barrier protection against corrosion and is designed so, to impart a particularly outstanding bimetallic corrosion resistance. Unlike commonly used methods of plating, non-electrolytic coating layer surface eliminates the formation of hydrogen embrittlement.
Besides the outstanding corrosion protection, Great 565 already contains a lubricant to reduce the need of surface lubricants.
Great 565 my silver – gray to look pleasant color. On request we can offer other colors.
Salt spray test (ASTM B117): 840 hours.
K-Faktor (USCAR torque / tension): 0,17±0,03.
FROM 946 coefficient of friction: 0,13±0,03.
Humidity / Adhesion (GM4465P/GM9071P): satisfactory.
Layer thickness: ca.. 15 µm.
• environmentally benign process, because it does not contain chromium
• acts as a protection against atmospheric corrosion
• provides exceptional galvanic corrosion protection of aluminum parts
• resistant to electrolytic and chemical damage
• Resistant to automotive fuels and gases, non-electrolytic deposition of coatings rich in zinc mikrolamely
• method of application does not cause hydrogen embrittlement
• recommended to threaded fasteners
• can be applied, as screws, and nuts without worrying about scuffing or other mechanical problems
• Suitable for connecting thread M6 features and more
• WSS-M21 P37-A1 (Ford Motor Co.) (S439)
• VCS 5737, 19 (Volvo)
• TL233 (VW)
• GMW3359 (Generál Motors)
• PS 10378, PS 10633 (Daimler Chrysler)
• DX 55801 (Delphi)
• TS 2-25-60 Class A (TRW)
• P91 (Arvin Meritor)
• GM (GM7114M)
Devices require a thorough cleaning of the surface prior to application. Unlike other coatings do not require phosphating of zinc. Application is carried out in three ways:
1. Bulk deposition by soaking in a basket and spun excess paint. This process repeats twice, to ensure a uniform layer and the solid surface. (Dip-Spin)
2. For larger parts suspension method is used, wetting followed by centrifugation to remove excess paint colors. (Dip Drain)
3. Spraying uses traditional robotic spray technology. This method is used for partial treatment of larger parts, such as. brake discs, and also for the uniform surface treatment of recessed portions, at risk of fouling paint.
After each of the above procedures, followed by thermal treatment for surface hardening.