Download Amorphous and nano alloys electroless depositions : by Bangwei Zhang Ph.D. PDF

By Bangwei Zhang Ph.D.

Amorphous and Nano Alloys Electroless Depositions: expertise, thought, constitution and Property describes the full improvement and an important matters (technology, concept, constitution and estate) brand new of electroless plating (EP). the writer concentrates at the basic clinical and educational difficulties (principle, mechanism and concept) in EP today.
Based at the heritage of EP, this useful reference describes plenty of new EP tactics, together with electroless Fe dependent alloy process deposits, formation and theoretical description of electroless alloys, microscopic idea of electroless plating deposits, microscopic buildings and floor morphology of electroless deposits, and weldability estate of electroless deposits.

  • Focus at the basic medical and educational difficulties (principles, mechanisms and concept) in electroless plating
  • The booklet supplies an outstanding evaluation of the learn and improvement during this box and every bankruptcy is totally referenced
  • Detailed research and assessment of the present facts, logically based for ease of use

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Additional info for Amorphous and nano alloys electroless depositions : technology, composition, structure and theory

Example text

Levina et al. in 1989 performed an investigation of properties of a nickel– phosphorous coating in a hydrogen sulfide-containing medium [165]. Their experimental results and the field test data showed that under the action of the hydrogen sulfide-containing formation fluid the nickel–phosphorous coating possesses the necessary corrosion resistance and makes it possible to increase the service life of the working parts of the pumps. Submersible centrifugal electric pumps are one of the basic means of mechanized recovery of petroleum from wells.

1 Physical Properties In 1992, Yarkosky and Cacciatore developed a method of preparing Al memory disks with a smooth metal plated finish [130], used for producing extremely smooth metal coatings on zincated aluminum substrates using a special double zincating procedure and/or a specially formulated electroless metal plating bath employing a unique plating process. Ernest et al. in Sandia National Laboratories measured the pore density of the nickel deposits on the copper coupons in 1998 [131]. Their results showed the expected trend of decreasing density with increasing deposit thickness.

The described method deposits a thick Ni layer directly on Al without the use of intermediate layers or surface activation as required in the prior art. The method basically comprises immersion in a stop-etchant that simultaneously removes aluminum oxide and activates the surface; immersion in a solution which activates the Al with nickel ions and deactivates mask material; and immersion in a novel electroless nickel bath. In 1979, Bandrand in his paper “autocatalytic (electroless) plating on aluminum” [111] reported that autocatalytic (electroless) Ni plating on Al is practiced extensively, even though there are numerous problems in preparing Al alloys and selecting a compatible solution.

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