Study on surface roughness parameters of nano composite coatings prepared by electrodeposition process

Raghavendra, C. R.; Basavarajappa, S.; Sogalad, Irappa; Saunshi, VinayKumar Kallappa

doi:10.1016/j.matpr.2020.09.493

Cited by 10 publications

(6 citation statements)

References 19 publications

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“…The linear (R) as well as the areal (S) roughness parameters of the obtained surfaces are presented in Table 3. The arithmetic mean deviation of the roughness profile (R a ) and the root mean square deviation of the roughness profile (R q ) are commonly used to describe surface roughness [59,60]. However, they are linear roughness parameters and do not take the entire sampling area into account, only the roughness profile along one of the arbitrary selected axes.…”

Section: Resultsmentioning

confidence: 99%

Surface Properties of Silica–MWCNTs/PDMS Composite Coatings Deposited on Plasma Activated Glass Supports

et al. 2021

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In this paper, we focus on fabrication and physicochemical properties investigations of silica–multiwalled carbon nanotubes/poly(dimethylsiloxane) composite coatings deposited on the glass supports activated by cold plasma. Air or argon was used as the carrier gas in the plasma process. Multiwalled carbon nanotubes were modified with poly(dimethylsiloxane) in order to impart their hydrophobicity. The silica–multiwalled carbon nanotubes/poly(dimethylsiloxane) nanocomposite was synthesized using the sol–gel technique with acid-assisted tetraethyl orthosilicate hydrolysis. The stability and the zeta potential of the obtained suspension were evaluated. Then, the product was dried and used as a filler in another sol–gel process, which led to the coating application via the dip-coating method. The substrates were exposed to the hexamethyldisilazane vapors in order to improve their hydrophobicity. The obtained surfaces were characterized by the wettability measurements and surface free energy determination as well as optical profilometry, scanning electron microscopy, and transmittance measurements. In addition, the thermal analyses of the carbon nanotubes as well as coatings were made. It was found that rough and hydrophobic coatings were obtained with a high transmittance in the visible range. They are characterized by the water contact angle larger than 90 degrees and the transmission at the level of 95%. The X-ray diffraction studies as well as scanning electron microscopy images confirmed the chemical and structural compositions of the coatings. They are thermally stable at the temperature up to 250 °C. Moreover, the thermal analysis showed that the obtained composite material has greater thermal resistance than the pure nanotubes.

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Section: Resultsmentioning

confidence: 99%

Surface Properties of Silica–MWCNTs/PDMS Composite Coatings Deposited on Plasma Activated Glass Supports

et al. 2021

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“…According to Albrektsson and Wennerberg, when considering roughness (Sa) as a scale there are typically four levels which consist of smooth (0–0.4 μm), minimally rough (0.5–1.0 μm), moderately rough (1.0–2.0 μm), and rough (>2.0 μm) 53 . Both Ra and Sa give the average roughness values; however, Ra is known as the arithmetic average roughness of absolute value and gives a good representation of height variation while Sa is known as the arithmetic mean height 54,55 . In a recent review, Rupp et al stated that after decades of evaluation of implant surfaces, there are still no accepted guidelines for analysis of roughness measurements 21 .…”

Section: Topography Surface Modificationsmentioning

confidence: 99%

Surface modifications to enhance osseointegration–Resulting material properties and biological responses

2021

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As life expectancy and the age of the general population increases so does the need for improved implants. A major contributor to the failure of implants is poor osseointegration, which is typically described as the direct connection between bone and implant. This leads to unnecessary complications and an increased burden on the patient population. Modification of the implant surfaces through novel techniques, such as varying topography and/or applying coatings, has become a popular method to enhance the osseointegration capability of implants. Recent research has shown that particular surface features influence how bone cells interact with a material; however, it is unknown which exact features achieve optimal bone integration. In this review, current methods of modifying surfaces will be highlighted, and the resulting surface characteristics and biological responses are discussed. Review of the current strategies of surface modifications found that many coating types are more advantageous when used in combination; however, finding a surface modification that utilizes the mutual beneficial effects of important surface characteristics while still maintaining commercial viability is where future challenges exist.

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“…The adherence of the anti-corrosion coating is a critical factor in ensuring the lifespan and toughness of aluminum alloys in corrosive environments [5,6]. The purpose of this research is to determine how coating processes impact the adhesion of anti-corrosion layers when applied on aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

Research on the Influence of Coating Technologies on Adhesion Anti-Corrosion Layers in the Case of Al7175 Aluminum Alloy

2023

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A key element in ensuring the service life and strength of aluminum alloys in many industrial applications is the adhesion of anti-corrosion coatings. The aim of this study is to analyze how coating processes affect the adhesion of anti-corrosion coatings on aluminum alloy 7175. In other words, the influence of the nature of the elementary layers that form the anti-corrosion coating was studied for the following: the anodic layer, the primer, and the topcoat. To learn more about the different coating technologies and how they affect adhesion, a thorough literature review was carried out. In addition, a case study using electrocoating and thermal spraying was conducted to show the impact of coating processes on adhesion. The results showed that electrodeposition, as opposed to thermal spraying, improved the adhesion of anti-corrosion coatings. In the case of the aluminum alloy analyzed, there is a significant difference in terms of the adhesion strength of the anti-corrosion coatings. This resistance is influenced by both the anodic coating (BSA TSA SAA) and the type of primer and topcoat used (water-based or solvent-based). The correct choice of anode coat and primer and topcoat can lead to an increase (or decrease) in the adhesion strength of the paint coat by 20%. In conclusion, this study highlights how crucial it is to select the best coating process to maximize the adhesion and durability of aluminum alloys under corrosion conditions.

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Study on surface roughness parameters of nano composite coatings prepared by electrodeposition process

Cited by 10 publications

References 19 publications

Surface Properties of Silica–MWCNTs/PDMS Composite Coatings Deposited on Plasma Activated Glass Supports

Surface Properties of Silica–MWCNTs/PDMS Composite Coatings Deposited on Plasma Activated Glass Supports

Surface modifications to enhance osseointegration–Resulting material properties and biological responses

Research on the Influence of Coating Technologies on Adhesion Anti-Corrosion Layers in the Case of Al7175 Aluminum Alloy

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