Effect of surface roughness on corrosion behaviour of low carbon steel in inhibited 4 M hydrochloric acid under laminar and turbulent flow conditions

Barmatov, E. B.; Hughes, Trevor; Eskin, Dmitry

doi:10.1016/j.corsci.2015.11.019

Cited by 112 publications

(55 citation statements)

References 27 publications

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“…In the literature, it was reported that a surface with more negative values of the S k parameter often presents an advantage in terms of friction , while more positive values are indicators of good corrosion resistance, since negative skewness values can lead to pitting corrosion . After annealing, an important increase of S k parameter was observed, evidencing the presence of high spikes, in good agreement with the AFM images (Fig.…”

Section: Resultssupporting

confidence: 85%

Influence of the annealing treatment on the structure, morphology, and corrosion resistance of sputtered Zr‐Ti‐Si‐O coatings used for biomedical applications

Cotruț

Braic

Vrânceanu

et al. 2016

Materials & Corrosion

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The aim of the present article is to investigate the corrosion resistance of the Zr‐Ti‐Si‐O coatings (as‐deposited and annealed) as possible candidate as new biocompatible material. The coatings have been characterized in terms of elemental and phase composition, roughness and corrosion resistance in simulated body fluid (SBF) at 37 °C. The coatings, with a compositional ratio O/(Zr + Ti + Si) of 1.38, were found to consist of a mixture of ZrTiO4, ZrSiO4, Ti2O3, and SiOx phases. The samples annealed in O2 atmosphere at 1100 °C for 30 min resulted in improved crystallinity, increased surface area, surface roughness, and skewness. The results of the electrochemical tests revealed that Zr‐Ti‐Si‐O coatings had improved the corrosion resistance to the aggressive attack of the SBF as compared to the bare Ti6Al4V alloy, the best results being obtained on annealed coatings.

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Section: Resultssupporting

confidence: 85%

Influence of the annealing treatment on the structure, morphology, and corrosion resistance of sputtered Zr‐Ti‐Si‐O coatings used for biomedical applications

Cotruț

Braic

Vrânceanu

et al. 2016

Materials & Corrosion

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“…The coatings under investigation in this paper exhibited kurtosis of less than 1, indicating that the surface consists of a few high peaks and low valleys, which can imply a good friction performance. Good corrosion resistance was found when the skewness had more positive values, while negative skewness indicated pitting corrosion [35]. In our case, both Mg-doped HAP coatings proved to have positive skewness, and were expected to have superior corrosion resistance than others.…”

Section: Morphologymentioning

confidence: 73%

“…In the literature, it is stated that skewness and kurtosis could be used to estimate the corrosion resistance and friction performance of a surface [34,35]. Sedlacek et al reported that a more negative skewness and a high kurtosis imply a low friction performance under dry sliding, due to the deep valleys, which act as wear particle traps [34].…”

Section: Morphologymentioning

confidence: 99%

Biodegradable Ceramics Consisting of Hydroxyapatite for Orthopaedic Implants

et al. 2017

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Abstract:This study aims to analyze hydroxyapatite (HAP) coatings enriched with Mg and Ti prepared by a magnetron sputtering technique on Ti6Al4V substrate. For preparation of the coatings, three magnetron targets (HAP, MgO and TiO 2 ) were simultaneously co-worked. The concentration of Mg added was varied by modifying the power applied to the MgO target. In all coatings, the Ti concentration was maintained constant by keeping the same cathode power fed during the whole deposition. The influence of different Mg dopant contents on the formation of phase, microstructure and morphology of the obtained Ti-doped HAP coatings were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Moreover, the effects of Mg addition upon corrosion, mechanical and biological properties were also investigated. Mg-and Ti-doped HAP coating obtained at low radio-frequency (RF) power fed to the MgO target provided material with high corrosion resistance compared to other coatings and bare alloy. A slight decrease in hardness of the coatings was found after the Mg addition, from 8.8 to 5.7 GPa. Also, the values of elastic modulus were decreased from 87 to 53 GPa, this being an advantage for biomedical applications. The coatings with low Mg concentration proved to have good deformation to yielding and higher plastic properties. Biological test results showed that the novel surfaces exhibited excellent properties for the adhesion and growth of bone cells. Moreover, early adherent vital cell numbers were significantly higher on both coatings compared to Ti6Al4V, suggesting that Mg ions may accelerate initial osteoblast adhesion and proliferation.

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“…That is, B30 is the smoothest surface among bilayer coatings. Surface roughness has negative impacts on corrosion resistance because a rough surface has a larger interfacial area with electrolyte and a bigger number of activated site to induce pitting corrosion, thus reduces corrosion resistance of substrate …”

Section: Resultsmentioning

confidence: 99%

Preparation and corrosion resistance of Ni‐P bilayer on magnesium alloy

Yuan

Gao

Wang

et al. 2017

Materials & Corrosion

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Ni‐P bilayers were prepared on AZ61 magnesium alloy by electroless plating method in dual baths with pH value of 11.0 and 5.5. The thickness, surface morphology, composition, structure and corrosion resistance of Ni‐P bilayer were observed and determined by scanning electron microscope (SEM), energy dispersive X‐ray spectrometry (EDX), X‐ray diffractometer (XRD) and electrochemical workstation. The results show that Ni‐P bilayer is composed of inner layer in mixed amorphous and nanocrystalline structure with phosphorus content of 3.9–4.0% and outer layer in amorphous structure with phosphorus content of 8.8–10.9%. The plating time of inner layer has a great impact on the morphology and corrosion resistance of Ni‐P monolayer and bilayer, and the corrosion resistance of Ni‐P bilayer is obviously higher than that of inner layer. The optimum plating condition for Ni‐P bilayer is the combination of inner layer's plating time of 30 min and outer layer's plating time of 180 min, under which Ni‐P bilayer gets a dense structure, smooth surface and higher corrosion resistance than that of single inner layer and outer layer.

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Effect of surface roughness on corrosion behaviour of low carbon steel in inhibited 4 M hydrochloric acid under laminar and turbulent flow conditions

Cited by 112 publications

References 27 publications

Influence of the annealing treatment on the structure, morphology, and corrosion resistance of sputtered Zr‐Ti‐Si‐O coatings used for biomedical applications

Influence of the annealing treatment on the structure, morphology, and corrosion resistance of sputtered Zr‐Ti‐Si‐O coatings used for biomedical applications

Biodegradable Ceramics Consisting of Hydroxyapatite for Orthopaedic Implants

Preparation and corrosion resistance of Ni‐P bilayer on magnesium alloy

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