Coupled with wear resistance, corrosion resistance is another important factor engineers choose electroless nickel coatings.
The choice of phosphrous level will depend on the specific exposure conditions. For example low phosphrous deposits perform best in strongly alkaline conditions and high phosphorous are better suited to neutral or acidic conditions.
Which ever type of electroless nickel coating is preferred the deposit must be free of porosity, to provide a continuous barrier coating to the underlying substrate.
Read more about benefits of electroless nickel coatings…http://bit.ly/171GLvn http://ow.ly/i/2dA3a
Posted by Alan Gardner on May 31, 2013
Wear resistance is a primary benefit of electroless nickel coatings. This attribute is used by engineers to prolong the life of many components including gears, cylinder liners and fuel injection systems.
Generally speaking an electroless nickel wear resistance is related to its hardness. The hardness of the most popular medium phosphorous electroless nickel systems is between 450 and 600 HV (no heat treatment). This gives an equivalent wear resistance of 22 – 26 mg / 1000 cycles when measured by the Taber Wear Index (TWI).
The hardness is increased to over 900 HV by heat treating the deposit, resulting in reduced weight loss when measured by the TWI to less than 18 mg/1000 cycles.
Posted by Alan Gardner on May 23, 2013
High Phosphorus Electroless Nickel is used extensively in onshore and offshore drilling applications. This coating provides exceptional corrosion protection, critical when components require protection for many years in harsh environments.
MacDermid has a full range of high phosphorus electroless nickel processes that are ELV, RoHS and WEEE compliant. We also offer processes that are completely cadmium and lead free.
Posted by Alan Gardner on May 16, 2013
Electroless nickel is often used to plate brake pistons to improve wear resistance. Typically a bright, ELV compliant medium phosphorus electroless is used. This deposit can be heat treated to further increase the hardness of the deposit. A bright electroless nickel deposit is preferred as this deposit reduces friction.
NiKlad ELV 835, a very high speed, bright 4 – 7% phosphorous electroless nickel, combines high hardness and wear resistance both with good corrosion protection. This makes it ideal for this application. Read more…http://bit.ly/17JGgn5
Posted by Alan Gardner on May 7, 2013
NiKlad ELV 811 is a ELV compliant high-phos electroless nickel system that not offers high corrosion and wear resistance. This makes it particularly suitable in applications where the ability to coat complex shapes, such as brake callipers, is required.
For more information on NiKlad ELV 811
and electroless nickel in automotive applications
Posted by Alan Gardner on May 1, 2013