Hard chromium electrodeposition from a trivalent chromium bath containing water-soluble polymer

The effect of polyvinylpyrrolidones (PVPs) with different molecular weights as polymeric additives to a sulfate trivalent chromium bath was ascertained. Introduction of PVPs to the plating bath was stated to result in improvement in the surface appearance of chromium deposits and stabilization of current efficiency value in long-term electrolysis. The rate of metal deposition is practically independent of the deposition time. Thus, using PVP additive allows one to obtain high-quality Cr-coatings with a thickness of several tens of micrometers. It is found by means of turbidimetric analysis that the polymer additive has an accelerating effect on the aggregation of particles of the chromium(III) hydroxide sol formed in the near-electrode layer.

Hard chromium electrodeposition from a trivalent chromium bath containing water-soluble polymer

The effect of polyvinylpyrrolidones (PVPs) with different molecular weights as polymeric additives to a sulfate trivalent chromium bath was ascertained. Introduction of PVPs to the plating bath was stated to result in improvement in the surface appearance of chromium deposits and stabilization of current efficiency value in long-term electrolysis. The rate of metal deposition is practically independent of the deposition time. Thus, using PVP additive allows one to obtain high-quality Cr-coatings with a thickness of several tens of micrometers. It is found by means of turbidimetric analysis that the polymer additive has an accelerating effect on the aggregation of particles of the chromium(III) hydroxide sol formed in the near-electrode layer.

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Turkish Journal of Chemistry-Cover
  • ISSN: 1300-0527
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
Sayıdaki Diğer Makaleler

Hard chromium electrodeposition from a trivalent chromium bath containing water-soluble polymer

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Simulation of impedance spectra of oxalic acid electroreduction to glyoxylic acid: effect of chemical activator, pH, activation energy, and reduction potential

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Preparation of a novel solid acid catalyst with Lewis and Brønsted acid sites and its application in acetalization

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Self-condensation reactions of acyl phosphonates: synthesis of tertiary O -protected α-hydroxyphosphonates

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NH-acidities and Hammett correlation of 3-para substituted phenyl-1,2,4-oxadiazol-5(4H)-ones and 1,2 λ4 3,5-oxathiadiazole 2-oxides in nonaqueous media

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A combined first principles TDDFT and experimental study on the UV-Vis spectra properties of M(p-nitrophenyl azo resorcinol)3 complexes (M: Fe, Cr)

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Comparison of chelating ability of NO-, NS-, ONS-, and ONO-type Schiff base derivatives and their stability constants of Bis-complexes with copper(II)

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Experimental investigation of drag reduction effects of polymer additives on turbulent pipe flow using ultrasound Doppler velocimetry

Şerife Zeybek VURAL, Göknur BAYRAM, Yusuf ULUDAĞ