Deposition of Zn–Cr alloy coatings from sulfate electrolyte: effect of polypropylene glycol 620 and glycine and combinations thereof

Boiadjieva, Tz.; Kovacheva, D.; Lyutov, L.; Monev, M.

doi:10.1007/s10800-008-9586-3

Cited by 15 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Surface morphology of Zn-Cr alloy coatings undergoes significant changes under the influence of changes in deposition conditions (figs. [6][7] and has a significant impact on their wettability, which in turn may affect its corrosion properties. All obtained Zn-Cr alloy coatings have a hydrophobic character with a different contact angle from 115° to 150° (fig.…”

Section: Direct Current Conditionsmentioning

confidence: 99%

See 1 more Smart Citation

Zn-Cr Alloy Coatings: Electrodeposition and Properties

Osuchowska

Buczko

Olkowicz³

2021

Journal of KONBiN

View full text Add to dashboard Cite

The electrodeposition process of Zn-Cr alloy coatings under the conditions of direct and pulsed current is discussed. The Cr content in the obtained alloy coatings, the current efficiency of the process, surface morphology, structure and wettability as a function of deposition parameters, such as current density, were determined. The Zn-Cr alloy coatings of good quality contained up to 20 wt.% Cr (for direct current) and up to 9 wt.% Cr (for pulse current). All the obtained coatings had a structure typical of zinc coatings (h.c.p.) and had a hydrophobic character. The morphology of the coatings changed significantly under the influence of changes in deposition conditions.

show abstract

Section: Direct Current Conditionsmentioning

confidence: 99%

“…Publications on researches on this subject are limited, fragmentary and incoherent, although literature references to the use of chromium-containing zinc alloys in industry can be found [1,2,[4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Zn-Cr Alloy Coatings: Electrodeposition and Properties

Osuchowska

Buczko

Olkowicz³

2021

Journal of KONBiN

View full text Add to dashboard Cite

show abstract

“…Glycine added to the base electrolyte as an only additive does not facilitate the alloy deposition, but stabilizes the electrolyte and contributes to a better appearance of the deposits [6]. The addition of glycine to the PPG-PEG-PPG containing electrolyte enables the deposition of Zn-Cr coatings containing up to about 20 mass% Cr (Table 3).…”

Section: Effect Of the Combined Additive Ppg-peg-ppg And Glycinementioning

confidence: 99%

“…The strong inhibition of the Zn bulk deposition has been related to polymer-electrode interactions [2][3][4][5]. Investigations with PPG 620 showed co-deposition of Zn and Cr at a less negative potential of -1.8 V (vs. Hg/Hg 2 SO 4 ) and a possibility to deposit alloy coatings containing up to 23 mass% Cr [6].…”

Section: Introduction mentioning

confidence: 99%

Effect of PPG-PEG-PPG Co-Polymer on Zn-Cr Alloy Electrodeposition

Boiadjieva-Scherzer¹

2016

JMSE-A

View full text Add to dashboard Cite

The Zn-Cr alloy coatings turned out to be an alternative to the Zn coatings for corrosion protection of steel. Following the development of the high speed deposition of Zn-Cr on steel sheets for the automotive industry adaptation of the deposition process for automotive small parts, structural components, etc. would be a further achievement. In this respect, the effect of the deposition conditions and particularly that of PPG-PEG-PPG co-polymer additive, average M n 2,000 on the Cr co-deposition with Zn was investigated. Cyclic voltammetry and galvanostatic deposition on rotating cylinder electrodes and on flat samples were applied. It was found that Cr co-deposition and dense layer formation could be obtained at a low concentration of the co-polymer additive (0.1 g•L-1) and in the low current density range (5-20 A•dm-2). Coatings were characterized by using XRFA (X-ray fluorescence analysis), SEM (Scanning electron microscopy), EDX (Energy dispersive X-ray) and XRD (X-ray diffraction). The Cr content in the alloys is up to 33 mass% depending on deposition conditions. Γ-(Zn,Cr) phase, a solid solution with a body centered cubic sub-cell and hexagonal η-(Zn,Cr) phase were detected.

show abstract

“…Poly(ethylene glycol) (PEG) was used to enable codeposition of metallic Cr with Zn [4,11,12]. Variation of the Zn-Cr coating properties was controlled by variation of the deposition conditions within a very small range.…”

Section: Introductionmentioning

confidence: 99%

X-ray photoelectron and scanning Auger electron spectroscopy study of electrodeposited ZnCr coatings on steel

et al. 2012

View full text Add to dashboard Cite

Zn-Cr alloyed coatings electrochemically deposited are of high interest for leading steel manufacturing companies because of their novel properties and high corrosion resistance compared with conventional Zn coatings on steel. For tuning and optimizing the properties of the electrodeposited Zn-Cr coatings, a broad range of the deposition conditions must be studied. For this reason, two different types of material were investigated in this study, one with a low electrolyte temperature and one with an elevated electrolyte pH, compared with the standard values. Because different corrosion performance and delamination behaviour of the layers were observed for the two types, advanced surface analysis was conducted to understand the origin of this behaviour and to discover differences in the formation of the coatings. The topmost surface, the shallow subsurface region, and the whole bulk down to the coating-steel interface surface were analysed in detail by X-ray photoelectron spectroscopy (XPS) and high-resolution scanning Auger electron spectroscopy to determine the elemental and the chemical composition. For better understanding of the resulting layer structure, multiple reference samples and materials were measured and their Auger and XPS spectra were fitted to the experimental data. The results showed that one coating type is composed of metallic Zn and Cr, with oxide residing only on the surface and interface, whereas the other type contains significant amounts of Zn and Cr oxides throughout the whole coating thickness.

show abstract

Deposition of Zn–Cr alloy coatings from sulfate electrolyte: effect of polypropylene glycol 620 and glycine and combinations thereof

Cited by 15 publications

References 9 publications

Zn-Cr Alloy Coatings: Electrodeposition and Properties

Zn-Cr Alloy Coatings: Electrodeposition and Properties

Effect of PPG-PEG-PPG Co-Polymer on Zn-Cr Alloy Electrodeposition

X-ray photoelectron and scanning Auger electron spectroscopy study of electrodeposited ZnCr coatings on steel

Contact Info

Product

Resources

About