Abou ABS/ABS Plating

Plating on plastices(POP)
Plating on plastices(POP) requires very specialized techniques because the substrates are non-conducting but it is one segment of the plating industry in which nickel is used almost without exception.

 

POP Process
The electroplating of plastics was introduced commercially in Europe and North America in the early 1960s,whth only limited acceptability.The major breakthrough that led to good growth in the industry was the development of chemical processes for the surface preparation of acrylonitrile butadiene styrene(ABS),which enabled good bonding to be obtained between the plastic substrate and the metallic coating.ABS remains the plastic most widely used for plating applications and excellent quality is now obtained routinely on plated parts.


In general,the procedures used for preparing plastics fof electroplating include the following stages:
.etching of the plastic surface to provide a hydropyilic surface and good deposit adhesion.Typically,the etchant consists of a concentrated solution of chromic acid and sulphuric acid and its effectiveness is heavily depdndent on the surface condition and composition of the substrate.
.activation of the etched surface to prodece the catalytic sites on the non-conducting plastic that will enable electroless nickel or electroless copper to deposit.These sites are typically produced from solutions cantaining palladium chloride and tin salts,which produce a very uniform distribution of minute palladium particles on the plastic surface.
.deposition of a thin electroless nickel or electroless copper film to provide a adherent,conductive base suitable for conventional electroplating.

 

Once this condection deposit has been produced,parts are ready for conventional electroplating.Nickel is used in practically all applications for plated plastice and is reponsible for the most important properties of the metallic deposit-its good corrosion resistance and its lustrous metallic appearance.In most applications it is used in combination with a chromiun topcoat but it is also used with precious metal topcoats,such as gold.


POP Marker
The major driving force for POP was the automotive industry.The need for increased for fuel economy required a reduction in vehicle weight.The industry saw in plastics a durable,light,more easily fabricated substrate which had the potential to replace more traditional metallic materials,such as Zinc die castings,at a lower cost. Consequently,plastic materials became used for a wide range of automotive components such as grilles,light bezels,emblems and other bright trim.
The rapidly developing technology began to spread into other markets but automotive applications remained dominant.Plated plastic plunbing fixtures such as bathroom and kitchen fittings appeared,as did control knobs for electronic equipment,plated buttons for clothing and a variety of household and personal care items.Thus,from a slow beginning in the 1960s,rapid growth occurred during the early and mid-1970s,Many electroplaters added POP to the services they coule provide and many new plating operations were built that were dedicated to the plastics plating industry.

 

Process of ABS plating (Satin Nickel)for Automotive
Load → Degreasing →Rinse →Pre-Etching →Hot Rinse →Rinse →Surface Dressing →EtchingX2 →Recover →Rinse →Top Rinse →Neutralization →Rinse →Per-Dip →Activating → Rinse →Peptization(Accelerate) →Rinse →Chemical Nickel →Spray →Rinse →Acid Pickling →Rinse →Nikel Strike →Recover →Rinse →Chemical Copper →Rinse →Acid Copper →Recover →Rinse →Acid Pickling →  Rinse →Semi-Bright Nickel →Bright Nickel →Rinse →Ackd Pickling →Rinse →Satin Nickel →Rinse →Microcracks Nickel →Rinse →Activating Before Cr3 →Rinse →Cr3 →Recover →Rinse →Passivation →Rinse →Hot Rinse →Blow-dry →Drying →Unload →Chrome Strip →Rinse →Copper Nickel Strip →Rinse →Nitric Acid Plating → Strip →Rinse →Hotrinse →Blow-dry  

 

 

KSDW®ABS Plating Equipment