The effect of zirconia ions on corrosion performance of sol–gel coated galvanized steel

Guin, Akshya Kumar; Bhadu, Manish Kumar; Sinhababu, Mohua; Udayabhanu, G.

doi:10.1007/s11998-014-9602-y

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…Organic-inorganic hybrid thin film coatings prepared by the sol-gel method are an attractive corrosion suppression alternative to chromate-based coatings, which are broadly recognized as being toxic to human health and the environment. The versatile chemistry of the sol-gel process [1] allows for tunable properties of coatings with improved fracture [2], abrasion, scratch and thermal resistance by incorporating inorganic components such as silicon [3], aluminum, zirconium [4], or titanium [5] under mild reaction conditions forming metal-substrate bonds. Customized nanoparticle size and porosity [6] can be achieved by controlling various formulation parameters such as pH, temperature [7], and the nature of the organic functional groups [8].…”

Section: Introductionmentioning

confidence: 99%

Interplay of Hydrophobic Thiol and Polar Epoxy Silicate Groups on Microstructural Development in Low-Alcohol, Crosslinked Sol–Gel Coatings for Corrosion Prevention

2021

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We have demonstrated that our patented, crosslinked, sol–gel, epoxy–thiol silicates made from the combination of (a) tetraethoxysilane (TEOS, T), 3-glycidoxypropyltrimethoxysilane (GPTMS, G), and the (b) sulfur-containing 3-mercaptopropyltrimethoxysilane (MPTMS, S) with TEOS in a 1:1 stoichiometric ratio form the 1:1 TGST (crosslinked epoxy and thiol silicates) coating, which can be successfully utilized for the corrosion protection of low-carbon steel. Alcohols that are a by-product of sol–gel reactions influence the network formation, crosslinking density, and formulation stability, are volatile organic contents, and are regulated in the coatings industry. To improve environmental sustainability, a series of low-alcohol (LA) formulations with TG:ST ratios of 3:1 to 1:3 was prepared to investigate the microstructural development and crosslinking reactions emerging from the interplay of the hydrophobic thiol and polar epoxy silicates induced by the low-alcohol environment. The impact on crosslinking density was characterized by Fourier Transform Infrared (FTIR), Raman, XPS, viscosity, and pot-life measurements. Low-alcohol TGST (LA(TGST)) formulations were compared, using the example of 1:1 TGST, to corresponding TGST formulations where alcohols were retained. The reduced impact of LA(TGST) formulations on global warming was quantified. The glossy and scratch-resistant LA(TGST) coatings showed 71% enhanced corrosion protection compared to the non-crosslinked hybrids.

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Section: Introductionmentioning

confidence: 99%

Interplay of Hydrophobic Thiol and Polar Epoxy Silicate Groups on Microstructural Development in Low-Alcohol, Crosslinked Sol–Gel Coatings for Corrosion Prevention

2021

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“…These silane coupling agents provide better corrosion resistance and adherence as compared to chromate and phosphate conversion coatings. 20-23 As an instance of silane coupling agent, a paraffin wax and a polyolefin grafted silane-based coatings were developed to meet the demand of enhancing superhydrophobicity and flexibility respectively. 24-27 Moreover polyorganosiloxane, zinc phosphate, iron phosphate and polyethylene (PE) wax grafted with their compatible coatings exhibited reduction in coefficient of friction.…”

Section: Introductionmentioning

confidence: 99%

Anticorrosive and lubricating polyphenol coatings on galvanneal steel

Jain

Bhagawati

Khandagiri

et al. 2017

Surface Engineering

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Phosphate ion containing acidic polyphenol coating solutions were developed as to mitigate the deleterious effect of corrosion on galvannealed iron surface. The influence of manganese sulphate, manganese phosphate and polyethylene wax in polyphenol coatings were investigated to reduce the powdering of complex-shaped galvannealed structures and corrosion effect. Moreover, the reactivity of coating at the surface was evaluated by glow discharge optical emission spectroscopy, scanning electron microscopy and energy dispersive spectroscopy. Low surface integration within 3.5% NaCl environment and frictional behaviour was achieved with 0.5% manganese phosphate in polyphenol coated coupon by electrochemical and mechanical testing respectively.

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“…According to Guin et al, this can be further modified by the addition of zirconium and lanthanum ion to enhance the corrosion resistance. However, these polysilane-based pre-treatments hinder the adhesion of subsequent coating layers (Guin et al, 2014a(Guin et al, , 2014b.…”

Section: Introductionmentioning

confidence: 99%

Significance of formed adherent complex by use of phosphorylated polyphenol coating

Jain

Bhadu

Swarnkar

et al. 2017

PRT

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Purpose The purpose of this paper is to report on the use of phosphorylated polyphenol (PP)-coated galvanised iron (GI) surface to study the degradation of coating with different time intervals and long-term exposure in different salty media. Design/methodology/approach The as-obtained PP complex on GI was evident by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), energy dispersive spectroscopy (EDS) and scanning electron microscopy (SEM). The coated coupons were exposed to different salty media such as 3.5 per cent NaCl, 1.5 per cent Na2SO4 and tap water at set time intervals. Electrochemical polarisation was performed to study the anodic and cathodic polarisation behaviour at each time interval. Findings The adherent foliolate nanopattern of iron zinc phosphate and zinc dihydrogen phosphate on GI surface was evident by SEM, FT-IR, EDS and XRD. The coated coupons exhibited good corrosion resistance. This coating performs as an alternative to time-consuming multistep operations of phosphating treatment. Originality/value The mode of the experiment treatment using modified PP coating especially on GI in different corrosive exposures at set time intervals is a novel approach in this research.

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The effect of zirconia ions on corrosion performance of sol–gel coated galvanized steel

Cited by 5 publications

References 19 publications

Interplay of Hydrophobic Thiol and Polar Epoxy Silicate Groups on Microstructural Development in Low-Alcohol, Crosslinked Sol–Gel Coatings for Corrosion Prevention

Interplay of Hydrophobic Thiol and Polar Epoxy Silicate Groups on Microstructural Development in Low-Alcohol, Crosslinked Sol–Gel Coatings for Corrosion Prevention

Anticorrosive and lubricating polyphenol coatings on galvanneal steel

Significance of formed adherent complex by use of phosphorylated polyphenol coating

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