The Zinc Nickel process is applied in a (bass) drum and (static) frame system with average thicknesses of 8 microns in transparent, silver, grey, blue, and black finishes, all of them exempt of Cr VI.
Its use is required for benefits with high corrosion resistance with high temperature functional requirements such as those that occur in the engine comworkpiecement.
The coating of Zn Ni, in addition to its high corrosion resistance, stands out for its great hardness against abrasion (workpieces powered by vibration) and chipping (workpieces of the lower areas of the vehicles).
The adhesion of the rubber and its resistance to high vulcanising temperatures, in spite of which it keeps intact the initial corrosion benefits, makes it an ideal coating for Rubber-Metal applications.
The ductility of Zn Ni is excellent in the specific option for this application (High Ductility) and moderate in the Standard version.
Another advantage is its good performance as a base coat for paintings, kataphoresis and subsequent applications by electrophoresis.
It is important to highlight its compatibility with Aluminium materials and that it is one of the best fixings with Stainless Steel.
Finally its great ability to achieve corrosion resistance equal to or superior to those of lamellar Zn makes it an excellent substitute for all those workpieces that due to their geometry cannot be treated with this coating (small footprints, flat workpieces, workpieces with holes, blind holes, subsequent deformation, or new specifications of tire mounting and dismounting)
The system consists of a metal deposition in an alkaline or acid electrolyte of Zinc Nickel with a contribution of 12% to 15% of Ni; subsequently, transparent, silver, grey, blue, or black passivation protects Zinc Nickel coating from white corrosion.
An additional seal (Top Coat) that penetrates in the passivation ends up closing its micro cracks and pores and ensuring compliance with corrosion requirements.
The Top Coats applied are perfectly adapted to the prior passivations and, besides raising White Corrosion protection, they improve the aesthetic appearance and increase the surface hardness of the coating.
The coefficient of friction and torque for the fixing elements may be modified in accordance with the International Standards of the automobile industry and this is usually achieved with additives that are workpiece of the formulation of the Top Coats.
The distribution of the coating is normal as well as the penetration in interiors.
The hardness of the finish may reach 450 HV
Respects European Directive 2003/EC/53 and RoHS,
The Zinc Nickel process may be finished with any of these finishes or combining several of them:
ORGANIC TOP COATS
LUBRICANTS FOR COEFFICIENT OF FRICTION
PATCH NYLON, MICROENCAPSULATION, ETC*
* All Post finishes may be applied according to demand, some in subcontracting, with approved Partners & Suppliers with full logistics under the responsibility of GHSA
Resistance to Corrosion
240 hours without White Corrosion
More than 1000 hours without Red Corrosion
24 h thermal shock at 180 º
Applications of adhesion of rubber on metal
Benefits of high resistance to corrosion (automotive, electricity )
Applications for items with functional requirements at high temperature
Steel fixings in contact with aluminium
Adhesion for applications in patch thread
PSA B154101 B154102
RENAULT 0171002 y 47000
MERCEDES BENZ DBL 8451
OPEL GMW 3044
GME 00 252
VW 13750 /TL244
BMW GS 90010
EN ISO 4042
NOTE: This is general information and is not in any case of a contractual nature since it needs to be confirmed by the conduction of tests and trials on each workpiece individually.