In-Situ Coating of Iron with a Conducting Polymer, Polypyrrole, as a Promise for Corrosion Protection DOI Open Access
Jaroslav Stejskal, Marek Jurča, Miroslava Trchová

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(19), P. 4783 - 4783

Published: Sept. 29, 2024

Iron microparticles were coated with polypyrrole in situ during the chemical oxidation of pyrrole ammonium peroxydisulfate aqueous medium. A series hybrid organic/inorganic core–shell materials prepared 30–76 wt% iron content. Polypyrrole coating was revealed by scanning electron microscopy, and its molecular structure completeness proved FTIR Raman spectroscopies. The composites polypyrrole/carbonyl obtained as powders characterized respect to their electrical properties. Their resistivity monitored four-point van der Pauw method under 0.01–10 MPa pressure. In an apparent paradox, increased from units Ω cm for neat thousands highest content despite high conductivity iron. This means that composite is controlled properties matrix. change sample size compression also recorded provides a parameter reflecting mechanical composites. addition conductivity, displayed magnetic afforded presence study illustrates feasibility on macroscopic objects, demonstrated nail, offers potential application corrosion protection differences morphology micro- objects are described.

Language: Английский

Cardanol Modified Alkyd Resin: Novel Route to Prepare Mos2 Based Polyurethane Nanocomposite Coatings DOI

Vikas J. Patil,

Kiran S. Patil, Swapnil L. Sonawane

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

1
Spray-synthesized organic composite/hydroxyapatite coating on magnesium alloys with enhanced corrosion resistance DOI Creative Commons
Guoqiang Wang, Yi Wei,

Jinquan Hong

et al.

Frontiers in Chemistry, Journal Year: 2025, Volume and Issue: 13

Published: April 2, 2025

The development and production of anti-corrosive coatings are critical for medical implants, particularly those that utilize composite made from both flexible organic materials rigid inorganic materials, which exhibit advantageous mechanical properties resistance to corrosion. In this work, an composite/hydroxyapatite (HA) coating on magnesium alloys is fabricated through a two-step process, involves the application spray technique silica [polyethyleneimine (PEI)/silica sol (Si)], followed by hydrothermal treatment deposit hydroxyapatite. dense tight layer-by-layer assembly PEI/Si/HA Mg substrate exhibited corrosion current density 10-5.6 A/cm2, significantly lower than HA substrate. After immersion 13 days, demonstrated minimal amount H2 generation negligible fluctuations in pH within solution. Meanwhile, weaker synthesized using method. Both electrochemical dynamic data structural characteristics demonstrate enhanced coatings, polymer chains provided more volume as buffer molecules. This huge potential applications orthopedics.

Language: Английский

Citations

0
In-Situ Coating of Iron with a Conducting Polymer, Polypyrrole, as a Promise for Corrosion Protection DOI Open Access
Jaroslav Stejskal, Marek Jurča, Miroslava Trchová

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(19), P. 4783 - 4783

Published: Sept. 29, 2024

Iron microparticles were coated with polypyrrole in situ during the chemical oxidation of pyrrole ammonium peroxydisulfate aqueous medium. A series hybrid organic/inorganic core–shell materials prepared 30–76 wt% iron content. Polypyrrole coating was revealed by scanning electron microscopy, and its molecular structure completeness proved FTIR Raman spectroscopies. The composites polypyrrole/carbonyl obtained as powders characterized respect to their electrical properties. Their resistivity monitored four-point van der Pauw method under 0.01–10 MPa pressure. In an apparent paradox, increased from units Ω cm for neat thousands highest content despite high conductivity iron. This means that composite is controlled properties matrix. change sample size compression also recorded provides a parameter reflecting mechanical composites. addition conductivity, displayed magnetic afforded presence study illustrates feasibility on macroscopic objects, demonstrated nail, offers potential application corrosion protection differences morphology micro- objects are described.

Language: Английский

Citations

0