|Author||Krishnan, R. M. ♦ Sriveeraraghavan, S. ♦ Sobha, J. ♦ Kennedy, C. J. ♦ Sekar, R. ♦ Mary, J. G.|
|Source||CSIR-Central Electrochemical Research Institute|
|Publisher||Central Electrochemical Research Institute|
|Subject Domain (in DDC)||Technology ♦ Chemical engineering|
|Subject Keyword||Industrial Metal Finishing|
|Abstract||For chromium plating, along with chromic acid a small quantity of sulphate ion is very much essential. In the absence of sulphate ion the chrome bath will not produce any bright deposit but will produce only brown film. The sulphate ion is nonually introduced as sulphuric acid at a ratio of 700:1 to chromic acid. In this paper, in order to study the effect of other sulphate ions, it is aimed to study the effect of cations associated with sulphates. The SUlphate to the chrome bath was introduced in the form of sulphuric acid, sodium sulphate, ammonium sulphate, potassium sulphate and chromium sulphate. Hull Cell experiments were carried out to study the nature of the deposit. Plating expe:;ments were also carried out to study the current efficiency, rate of buildup, porosity, hardness, and nature of deposit and the results are presented.|
|Education Level||UG and PG|
|Learning Resource Type||Article|
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