Pretreatment of carbon steel with silane film modified with a mixture of garlic and cocoa

Santos, Sérgio Leonardo Butski Soares; Silva, Brunela Pereira da; Tokumoto, Miriam Sanae; Freitas, Fagner Luiz da Costa; Aoki, Idalina Vieira; Capelossi, Vera Rosa

doi:10.1007/s10971-023-06154-2

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…Secondary electrons generated the micrograph shown in the upper part of Figure 9 and reveal a topography with roughness characteristics of bare carbon steel for the T sample (Figure 9A), as observed by Santos et al 5 , for bare carbon steel, in addition to the presence of the morphology of EXSBA precipitated on the surface of the T3EXSBA sample (Figure 9B). In the images generated by backscattered electrons, in the lower part of Figure 9, the lighter regions are related to elements of higher atomic mass such as iron in the metallic alloy.…”

Section: Morphological Characterizationsupporting

confidence: 70%

“…Thus, the total mass loss of EXSBA was about 14.2%, indicating that at least about 7.4% can be attributed to the presence of organic compounds within the pores of EXSBA. The difference in the OCP value after 60 min from the pretreated samples to the bare steel indicates a change in the surface of these samples, shifted towards anodic or cathodic potentials compared to bare steel, suggesting the deposition of a film on the metallic surface 5,13 .…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

“…However, this steel has low corrosion resistance when exposed to corrosive environments, especially in the presence of chlorides 1,3 . Thus, methods such as pretreatments and corrosion inhibitors are needed to provide greater resistance against corrosion, anchoring of future coatings, and active protection in aggressive media 4,5 .…”

Section: Introductionmentioning

confidence: 99%

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TEOS Silane Film Modified with SBA-15 Loaded with Cocoa Husk Extract as Pretreatment of ASTM 1008 Steel

Silva,

Carrijo-Gonçalves,

Barreto

et al. 2024

Mat. Res.

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Research on eco-friendly methods led to the investigation of natural inhibitors and silane films modified with nanostructured mesoporous silica (SBA-15), a molecular sieve that can carry molecules with inhibitory properties. Combining natural extracts such as cocoa husk with SBA-15 aims to develop an enhanced silane-based pretreatment. This involves obtaining an alcoholic extract, and then mixing it with SBA-15 to modify the silane film. Different concentrations (1%, 2%, and 3%) of SBA-15 loaded with extract were prepared. Electrochemical tests, especially electrochemical impedance spectroscopy (EIS), in a 0.1 mol/L NaCl solution, revealed improved corrosion resistance with the tetraethylorthosilane (TEOS) film modified using 3% SBA-15 loaded with extract. Scanning electron microscopy showed the film and SBA-15 on the steel surface, while Fourier transform infrared spectroscopy identified functional groups characteristic of SBA-15, pure or loaded, and silane film. Therefore, it was possible to enhance the TEOS silane film by adding SBA-15 loaded with plant residue extract.

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Section: Morphological Characterizationsupporting

confidence: 70%

Section: Thermogravimetric Analysismentioning

confidence: 99%