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mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Preparation, characterization, surface chemistry and corrosion properties of Ni-TM-P alloys produced by autocatalytic reduction
  name:
    name part: Mendoza Gonzalez, Oscar
    name part: 1954-
    role:
      role term: creator
  name:
    name part: Cocke, David L.
    role:
      role term: degree supervisor.
  name:
    name part: White, Ralph E.
    role:
      role term: degree supervisor.
  name:
    name part: Popov, Branko N.
    role:
      role term: degree committee member.
  name:
    name part: Wolfenden, Alan
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1991
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xii, 150 leaves : illustrations ; 29 cm
  abstract: Autocatalytic or electroless deposition of Ni-P film alloys has been reviewed and considered as a model for the deposition of ternary alloys such as Ni-TM-P where TM is W-Mo and Cr. This study is a comprehensive analysis of the parameters that influence each one of the steps involved in a successful deposition. It starts in the preparation of the substrate to be plated; special attention is given to the mechanical polishing, degreasing and chemical activation. The degree of cleanliness provides the film's quality of adherence. The bath's chemical composition is explained in terms of the role played by each of the bath components such as Ni and P, complexing agents, buffers, stabilizers and other additives. The most important parameters that influence the rate of deposition and the film's properties are temperature, pH and concentration of the components in the plating bath. The characterization of the autocatalytic film was done from the structural, chemical composition and surface chemistry perspectives. X-ray Diffraction, (XRD), Energy Dispersive X-ray Spectroscopy (EDS) and X-ray Photoelectron Spectroscopy (XPS) techniques were used in this study. Two chapters are devoted to the study of chemical and electrochemical mechanisms of autocatalytic deposition of Ni-TM-P and chemical kinetics. From the experimental results it can be said that the deposition of Ni-W-P is mostly a chemical mechanism; deposition of Hi-Mo-P is governed by both chemical and electrochemical mechanisms and Ni-Cr-P deposition is only possible when the process is controlled by an electrochemical mechanism. The reducing power of hypophosphite is larger when the mechanism is purely chemical; therefore, Ni-Cr-P is difficult to deposit in an autocatalytical (chemical) way. To over-ride this difficulty additions of boron compounds are recommended in this study. Corrosion results show that structure or chemical composition alone are not sufficient to provide excellent corrosion resistant properties f…
  note: Typescript (photocopy).
  note: Vita.
  note: "Major subject: Interdisciplinary Engineering."
  note: Ph. D. Texas A & M University 1991
  note: Includes bibliographical references.
  subject:
    topic: Nickel alloys
    topic: Structure
  subject:
    topic: Nickel alloys
    topic: Surfaces
  subject:
    topic: Nickel alloys
    topic: Corrosion
  subject:
    topic: Electroless plating
  subject:
    topic: Major interdisciplinary engineering
  identifier: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  record info:
    record content source: TXA
    record creation date: 920227
    record change date: 20200904152557.0
    record identifier: in00001073250
    language of cataloging:
      language term: eng