Tag Archive for high phosphorus electroless nickel

The Future’s Bright, The Future’s NiTEC

LED_lights

2008 saw the beginning of the EU process which took four years to put in to place, preventing incandescent light bulbs from being sold.  This was because they performed inadequately and were not eco-friendly due to the high amount of electricity they consumed.  The LED has therefore taken its place on our supermarket shelves, as they are proven to be much more efficient.

Plating Industries

The electronic and automotive industries, as well as most British households and road engineers for road lighting applications, are using LED lights.  The LED substrate can be silver plated either conventionally by rack or less conventionally by reel-to-reel plating procedures.  Plating differs depending on the thickness, and ranges from 20 to 150 A/dm², normally.

Bright Lights

How are LED lights so bright?  This is due to a low free-cyanide silver process which contains brightener additives.  This creates high luminosity.  These LEDs are much more eco-friendly, cost effective and use a fraction of the amount of electricity of an incandescent light bulb.

Heat Treatment gets the Deep Treatment

The silver deposits used to plate the LEDs were initially heated for 60 minutes at 200° and then for 120 minutes at the lower temperature of 170°C but it was quickly identified that significant reflectivity was lost during this.  So it was decided that a post-dip was going to be used in order to prevent the reflectivity loss, in the form of an aqueous treatment post heat treatment.  This seems to have worked, having been tested on multiple different types of nickel, at higher temperatures and with the nickel being treated for shorter lengths of time (up to 1 minute), as the GAM measurements do not diminish dramatically at all.  Thus, proving the effectiveness of the combination of plating, heat treatment and the post-dip aqueous treatment as a trio.

Contact NiTEC UK Today

If you or your business are interested in plating, such as electroless nickel plating or diffused nickel plating, heat treatment or have a special project which you require specialist assistance with, then why not get in touch with NiTEC UK?  We are Derbyshire based, leading specialists in the plating industry who can offer you a wide range of well-developed techniques which are not only high-end but also cost effective.  We have experience of working for the aerospace, medical, army and automotive industries, to name but a few and offer our services to the whole of the UK, Germany, France, Brazil and Holland.  Why not get in touch with us today on 0845 224 3571 or alternatively you can email us at info@nitec-enp.co.uk

The Composition and Structure of Electroless Nickel Plating

Component plated with high phosphorus electroless nickelThe structure of electroless nickel is responsible for the unique properties it possesses, making it such a useful metal coating. Electrodeposited nickel typically has a crystalline structure, whereas an electroless nickel deposit is normally described as having an amorphous structure or one consisting of ultra-fine crystallites. The amorphous nature of electroless nickel deposits become more dominant as the phosphorus content increases, and phosphorus contents above 10.5% are typically considered truly amorphous.

The absence of a well-defined crystal structure eliminates the possibility of inter-granular corrosion that can be a problem with crystalline deposits, such as electrolytic nickel. Electroless nickel, therefore, provides a barrier that is more effective at protecting a substrate from corrosion.

Heat Treatment and Electroless Nickel Plating

Heat treatment can also be used to change the properties and structure of nickel phosphorus deposits. High temperature heat treatment solutions for sustained periods can be used to diffuse the electroless nickel layer into the steel, giving a degree of flexibility to the coating. This process does not affect the increased corrosion protection offered by this type of deposit.

The Composition of Electroless Nickel Coatings

The phosphorus content of an electroless nickel coating has a great effect on the properties of the deposit, and can be varied over a wide range.

High Phosphorus Electroless Nickel Coatings

For example, high phosphorus electroless nickel typically contains a phosphorus content of between 10-12%, making it ideal for applications where a uniform, hard and highly corrosion resistant coating is required. Other advantages include low porosity, pit-free deposits and a very stable and robust coating.

Medium Phosphorus Electroless Nickel Coatings

Medium phosphorus solutions contain between 6 and 10% phosphorus and produce a coating which effectively combines intermediate hardness with good corrosion resistance. Medium phosphorus coatings deposit rapidly and produce a bright or semi-bright coating.

Low Phosphorus Electroless Nickel Coatings

A low phosphorus electroless nickel coating typically contains 2.5% phosphorus. This produces a very uniform porous free coating which uniformly covers the complete surface of the component, including inside recesses. It has excellent corrosion resistance in alkaline conditions, but the coating is relatively soft, below 235VPN, and is therefore not particularly wear resistant.

Worldwide Electroless Nickel Plating Service

Contact us today on 0845 224 3571 or email us at info@nitec-enp.co.uk to talk through your electroless nickel plating requirements.

Types of Electroless Nickel Plating and the Different Benefits of Each

As experts in the process of electroless nickel plating, we offer a range of metal plating services which all have different properties. Here’s a guide to our main services, including the benefits of each.

electroless nickel plated componentLow Phosphorus Electroless Nickel Plating

A low phosphorus electroless nickel coating typically contains 2.5% phosphorus. This produces a very uniform porous free coating which uniformly covers the complete surface of the component, including inside recesses. It has excellent corrosion resistance in alkaline conditions, but the coating is relatively soft, below 235VPN, and is therefore not particularly wear resistant.

Medium Phosphorus Electroless Nickel Plating

Medium phosphorus solutions contain between 6 and 10% phosphorus and produce a coating which effectively combines intermediate hardness with good corrosion resistance. Medium phosphorus coatings deposit rapidly and produce a bright or semi-bright coating.

High Phosphorus Electroless Nickel Plating

High phosphorus electroless nickel typically contains a phosphorus content of between 10-12%, making it ideal for applications where a uniform, hard and highly corrosion resistant coating is required. Other advantages include low porosity, pit-free deposits and a very stable and robust coating.

nickel ptfe plated componentNickel PTFE Plating

Nickel PTFE plating is a unique plating solution that combines the hardness of electroless nickel with the lubricity of Polytetrafluoreothylene (PTFE). Its properties of low friction wear and self lubrication make it an excellent choice for sliding wear applications, and instances where conventional lubricants would be harmful to components.

Nickel Boron Plating


Nickel boron
is a surface deposit coating that can be applied to a wide range of metals including steel, stainless steel, nickel alloys, aluminium, cobalt alloys, copper alloys, and titanium. It is a great alternative to chrome plating and has many benefits, including excellent wear and corrosion resistance. It is also resistant to fretting and galling, resistant to abrasion, ductile, solderable and has excellent rigidity.

Nickel Diamond Plating

nickel diamond platingThe features of nickel diamond plating enable it to provide a highly corrosion and wear resistant coating. Due to the electroless chemical method of deposition, nickel diamond plating is able to cover surfaces with perfect uniformity. Therefore, regardless of the geometry of the component, the nickel diamond coating creates a uniform deposition on all areas of the part, even on recesses and holes. Nickel diamond plating has many other benefits which make it a superior choice of coating, including hardness and increased thermal transfer.

Electroless Nickel Plating Service

Contact us today on 0845 224 3571 or email us at info@nitec-enp.co.uk to talk through your electroless nickel plating requirements. We are able to talk you through the different services that we offer, and provide more details on the benefits of each one.

Top 3 Benefits of High Phosphorus Electroless Nickel

The phosphorus content in an electroless nickel coating is a key component in the determination of the properties of that coating. There are varying levels of phosphorus content, and each provides unique properties. High phosphorus electroless nickel typically contains a phosphorus content of between 10-12%, making it ideal for applications where a uniform, hard and highly corrosion resistant coating is required. Here are the top 3 benefits of a high phosphorus electroless nickel coating.

Hardness

Electroless nickel coatings with a high phosphorus content offers high levels of hardness and a lack of porosity, which makes it an ideal barrier coating for components, especially those that are used in hostile environments or are subject to aggressive use. The as-plated hardness of electroless nickel is approximately 48-52 Rc, but it can be heat treated to 68-70 Rc for a more wear resistant finish.

Corrosion Resistance

High phosphorus electroless nickel coatings are recommended where the maximum level of corrosion protection is needed. This makes it ideal for industry standards requiring protection from highly corrosive acidic environments such as oil drilling and coal mining.

Uniformity

nickel plating technical figureThe process of high phosphorus electroless nickel plating involves a chemical reaction, rather than electricity which is used in electroplating. Electroplating often produces a number of unwanted effects such as edge build up, uneven thickness, no plating in corners and recesses etc.

But electroless nickel plating, on the other hand, guarantees full coverage that is so uniform that the surface finish is normally duplicated. This also eliminates the need for post plate grinding or polishing. Even complex shapes such as threads keep their original geometry after plating.

Other advantages of high phosphorus electroless nickel are as follows:

  • Low porosity
  • Non-magnetic
  • Less prone to staining
  • Pit-free deposits
  • Fast deposition rate throughout life
  • Consistent deposition rate throughout life
  • Very stable and robust

Corrosion Resistant Metal Coating

If you are looking for a highly effective corrosion resistant metal coating, high phosphorus electroless nickel is a great solution. Call the NiTEC team on 0845 224 3571, email info@nitec-enp.co.uk or get in touch via our contact page.

UK’s Largest Electroless Nickel Plating Tanks at NiTEC UK

As experts in the process of electroless nickel plating, NiTEC UK have the largest electroless nickel plating tanks in the UK.

Pre-Treatment for Electroless Nickel Plating

Before a component can be electroless nickel plated, it must be suitably prepared for the process. Firstly, the part is cleaned in a series of pre-treatment tanks and rinsed in water. It then enters the coating tank which is heated to a critical temperature above 90C and contains the plating solution made up of the nickel-phosphorus alloy and a reducing agent.

electroless nickel plating lineThe thickness of the coating that is deposited is dependent on the immersion time, and the phosphorus content of the solution governs its hardness and corrosion resistance.

In order to achieve the maximum thickness achievable, the part needs to be in the plating tank for approximately 9-10 hours, during which time the solution is agitated and continuously re-circulated to prevent debris being incorporated into the coating. The total contents of the tank will be filtered and re-circulated within 10 minutes.

There are three levels of phosphorus in solution that are typically used, each of them having different benefits and attributes.

 

Low Phosphorus Electroless Nickel Plating

A low phosphorus electroless nickel coating typically contains 2.5% phosphorus. This produces a very uniform porous free coating which uniformly covers the complete surface of the component, including inside recesses. It has excellent corrosion resistance in alkaline conditions, but the coating is relatively soft, below 235VPN, and is therefore not particularly wear resistant.

Medium Phosphorus Electroless Nickel Plating

Medium phosphorus solutions contain between 6 and 10% phosphorus and produce a coating which effectively combines intermediate hardness with good corrosion resistance. Medium phosphorus coatings deposit rapidly and produce a bright or semi-bright coating.

High Phosphorus Electroless Nickel Plating

High phosphorus coatings contain between 11-14% phosphorus and produce hard coatings of up to 600VPN. This level of hardness is ideal for wear resistant applications in harsh acid environments typical of the conditions experienced in oil and gas drilling or mining applications. The high phosphorus level also renders them non-ferromagnetic and hence suitable for coating, for example, austenitic stainless steels, for applications where ferro-magnetism cannot be toleration such as MRI scanners. Such hard coatings are also used on stainless steel to improve its galling resistance in wear situations.

Electroless Nickel Plating Service

Contact us today on 0845 224 3571 or email us at info@nitec-enp.co.uk to talk through your electroless nickel plating requirements and see how NiTEC can provide high quality processes at a cost to suit your business.

High Phosphorus Electroless Nickel Coatings

High phosphorus electroless nickel provides the highest levels of corrosion resistance. It is often used in industries that require high levels of resistance to strongly acidic corrosive environments, for example, coal mining and oil drilling.

Component plated with high phosphorus electroless nickelElectroless nickel containing high levels of phosphorus has a low degree of solderability, and will only be solderable for a limited time after plating. This makes it perfect for electronic parts such as connector housings and semiconductor packaging.

The microhardness levels of high phosphorus electroless nickel coatings range up about 600 VPN. This type of nickel coating makes for low levels of surface porosity, and is not prone to staining.

Also, when the phosphorus content is greater than 11.2%, deposits are non-magnetic.

Features of high phosphorus electroless nickel:

  • Corrosion resistant
  • Fast deposition rate throughout life
  • Consistent deposition rate throughout life
  • Very stable and robust

If you are looking for a metal coating that provides high levels of corrosion resistance, high phosphorus electroless nickel is a great solution. Call the NiTEC team on 0845 224 3571, email info@nitec-enp.co.uk or get in touch via our contact page.