• Indira Rajagopal

      Articles written in Bulletin of Materials Science

    • Electroless and electrodeposition of nickel boron composites

      Indira Rajagopal

      More Details Abstract Fulltext PDF

      It is shown that nickel boron composite coatings can be obtained by electroplating nickel from a bath containing dispersed boron particles. This deposit heated to 300°C forms Ni-Ni3B composite. Further heating to 400°C converts it into Ni-Ni2B composite. Mechanical properties, corrosion resistance and wear resistance Ni-Ni2B composite are better than nickel or the electroless Ni-B composite in the as-deposited condition. The properties of heat-treated electroplated Ni-B composite are similar to that of heat-treated electroless Ni-B composites.

    • Electrochemical preparation of potassium gold cyanide

      Indira Rajagopal S R Rajagopalan

      More Details Abstract Fulltext PDF

      The essential requirements for the industrial preparation of potassium gold cyanide (pgc) are: (a) high rate of dissolution and (b) smooth and uniform dissolution. Employing galvanostatic and potentiostatic polarisation data and observations on the surface topography of anodes dissolved by both the techniques, it is shown that potentiostatic dissolution of gold in potassium cyanide at +0·345 V satisfies the above requirements.

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