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Development of electrodeposited chromium composite by amphoteric surfactant

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A chromium-silicon carbide electrodeposited composite coatings were obtained by suspending silicon carbide (SiC) particles in a trivalent chromium plating solution. This composite was improved by adding the synthesized 1-ethyl-1-cetyl-2-sulfonate-4(hydroxy ethyl)-piprazine (A16) as dispersing agent for SiC. The adsorption of A16 on SiC was determined. The relation between the zeta potential and codeposition of SiC was investigated by studying the effect of the additive (A16) concentration on mobility (dispersion) and the zeta potential of SiC. The results show that the zeta potential of SiC is more positive at critical micelle concentration of the additive and stimulation results from the adsorption of A16 on the SiC particles. Morphology resistance of the coating was determined and compared with free chromium deposits. These results were discussed according to the obtained adsorption isotherm of the additive.
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Keywords: Additives; Coatings Technology; Lubrication

Document Type: Research Article

Publication date: April 1, 2004

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