TECHNOLOGY OF ELECTROPLATING DEPOSITION OF NICKEL-BORON COATING ON THE DIFFERENCE SUBSTANCES INSTEAD OF GOLD, SILVER, PALLADIUM, CHROMIUM AND NICKEL
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Innovation division
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Research Institute of Physical-Chemical Problems of the Belarusian State University  
Address: 14, Leningradskaya str.,220050 Minsk,
Republic of Belarus

        Patent of the Republic of Belarus N 30 -  Patent of the Russian Federation N 2058437

Purpose:

   Protective functional nickel-boron coating may be deposited on the different metal substances such as copper, brass, beryllium bronze, steel, kovar, tungsten, aluminium and its alloys etc. Technology of nickel–boron coating production is based on the electroplating deposition of two–component alloys. Nickel–boron coating is characterized by low contact resistance, high microhardness, wear resistance, corrosion stability, solderability and weldability by ultrasound

   Polycrystalline coating Ni–B (1–6 at. % B) is used

  • for making printed circuit board instead of the gold and palladium coatings or as sublayer under a very thin layer gold
  • in production of contacts and contacting devices instead of the gold and silver coatings

    •    Amorphous coating Ni–B (16–25 at. % B) is used

  • on instruments (instead of chromium)
  • on refrigerating equipment used for production of fiberglass
  • on cutting disks for processing raw diamond materials into brilliant

Area of application:

  • instrument-making
  • radio engineering
  • microelectronics

Advantages:

  • simple in exploitation and can be used for a long period of time in variable conditions
  • decrease of the production cost
  • allows to carry out the formation of amorphous alloys at low temperatures

    • Technical characteristics of the nickel-plating solution and coating Ni-B:

      plating rate for stationary bath, mkm/h:
      plating rate for drum and bell type of bath, mkm/h

    25-50
    5-10
      deposition temperature, °C

    20-50
      boron-complex is characterized by high chemical stability and high efficiency microhardness by Vickers, GPa
      microhardness by Vickers, GPa
      microhardness after treatment (300°C, 1 hour), GPa

    6-8
    10-13
      contact resistance, mOhm

    3-6
      wear resistance, (Ni–B), mm3
      wear resistance, (Ni), mm3

    2-10-7
    8-10-5
      bond resistance with aluminium conductor, g

    10-16
      corrosion stability to salt (sea) fog, solar radiation, ambient temperature variations (thermocycling), low pressure, condensed precipitation environment (rime, rain, dew), high humidity and static dust
      the technology of electroplating deposition of nickel–boron coating is material saving and resource saving

     

Implementation:

  • printed circuit boards: Minsk Watch Plant (Minsk), "Zenith" (Mogilev), "Enef" (Molodechno) etc.;
  • contacts, contacting devices, instruments: "Screen" (Borisov), Electromechanical Plant (Minsk), Mechanical Plant (Minsk), "Nomacon" (Minsk) etc.;
  • cutting disks for processing raw diamond material into brilliants: "Crystal" (Gomel);
  • refrigerating equipment used in production of fiberglass: Polotsk–"Steklovolokno"

    • Forms of cooperation:

    Selling of technology. Contract signing for experimental or development batch production

 
 
For additional information please contact us at:
phone: (+ 375 17) 2928342
fax: (+375 17) 2327183
e-mail:		 Ministry of Education for the Republic of Belarus