Infrared-spectroscopy analysis of zinc phosphate and nickel and manganese modified zinc phosphate coatings on electrogalvanized steel

Fernandes, Kirlene Salgado; Alvarenga, Evandro de Azevedo; Brandão, Paulo Roberto Gomes; Lins, Vanessa de Freitas Cunha

doi:10.1590/s0370-44672011000100005

Cited by 10 publications

(2 citation statements)

References 9 publications

(8 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Fourier transform infrared spectroscopy (FTIR) analysis of SLM-Zn surface (Figure S4a, Supporting Information) also proved the existence of ZnF 2 (2933, 1662, and 1456 cm −1 ) and Zn 3 (PO 4 ) 2 (1112, 950, and 579 cm −1 ). [31,32] From Raman analysis (Figure S4b, Supporting Information), strong characteristic peaks assigned to ZnF 2 at 68, 360, and 520 cm −1 can be clearly detected, [33] and these obvious peaks at 571, 888, 1099, and 1147 cm −1 were related to the formation of Zn 3 (PO 4 ) 2 . [22,34] It is noted that the desirable polygonal structure of SLM parallel to the substrate has been successfully constructed with a thickness of ≈738 nm, as intuitively indicated by scanning electron microscopy (SEM) images (Figure 1d-f).…”

Section: Resultsmentioning

confidence: 99%

Stacked Lamellar Matrix Enabling Regulated Deposition and Superior Thermo‐Kinetics for Advanced Aqueous Zn‐Ion System under Practical Conditions

Shu

Chu

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

Zinc anodes have attracted widespread attention for their intrinsic safety, low cost, and abundant resources, but still suffer from severe irreversibility due to spontaneous corrosion and nonplanar dendrite formation in aqueous electrolytes. In this work, a 3D stacked lamellar matrix (SLM) composed of ZnF 2 /Zn 3 (PO 4 ) 2 /CF X is elaborately designed on a Zn substrate via simple chemical/electrochemical reactions, delivering enhanced thermodynamic stability and rapid zinc ions transport kinetics. The abundant ion conduction channels in SLM could also redistribute Zn 2+ ions flux and further suppress the dendrite growth. With these synergetic effects, the SLM-Zn anodes enable exceptional performance, including a high depth of discharge (90%) in a Zn|Zn symmetrical cell for 187 h, steady charge/discharge process (94.1% retention of SLM-Zn|MnO 2 full cell for 1000 cycles at a harsh rate of 15 C), and low negative/positive capacity ratio (≈3.3) in SLM-Zn|AC hybrid supercapacitor with limited Zn anode (10 µm) and high-load cathode (≈1.77 mA h cm −2 ), which greatly promotes the application of aqueous Zn-ion energy system under practical conditions.

show abstract

Section: Resultsmentioning

confidence: 99%

Stacked Lamellar Matrix Enabling Regulated Deposition and Superior Thermo‐Kinetics for Advanced Aqueous Zn‐Ion System under Practical Conditions

Shu

Chu

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…El espectro de la muestra ZAPP presenta, además de las bandas correspondientes a la absorción de agua, una señal entre 800 y 1100 cm -1 asociada a la presencia del grupo PO 4 -3 y una banda en 635 cm -1 asociada a la unión P-O-P característica de los polifosfatos [30,31].…”

Section: Análisis Mediante Espectroscopia Infrarroja Con Transformada De Fourier (Ftir)unclassified

Estudio de las propiedades anticorrosivas sobre acero SAE 1010 de extractos acuosos de romero (Rosmarinus officinalis), laurel (Laurus nobilis) y falso incienso (Plectranthus coleoides)

et al. 2021

View full text Add to dashboard Cite

RESUMEN Las hojas de las plantas perennes Rosmarinus officinalis, Laurus nobilis y Plectranthus coleoides presentan una gran cantidad de compuestos químicos que contienen heteroátomos en su estructura. Diversos estudios han reportado que este tipo de heterocompuestos presentan una gran afinidad química por las superficies metálicas. En este trabajo se presenta la obtención, caracterización y estudio del desempeño anticorrosivo sobre acero SAE 1010 de los extractos acuosos de las hojas de las plantas perennes antes mencionadas. Las especies vegetales fueron cultivadas y cosechadas en la zona del Gran La Plata, Provincia de Buenos Aires, República Argentina. La preparación de los extractos acuosos se realizó mediante la técnica de maceración. El residuo sólido de los extractos acuosos se caracterizó mediante espectroscopia infrarroja con transformada de Fourier (FTIR). La evaluación electroquímica se llevó a cabo mediante la exposición de muestras de acero SAE 1010 durante 24 h a un medio corrosivo en presencia de cada uno de los extractos, y el posterior análisis de las superficies obtenidas a través de microscopía electrónica de barrido (SEM) y espectroscopia de dispersión de rayos X (EDX). Los resultados fueron comparados con los obtenidos utilizando hidrato de polifosfato de zinc y aluminio (ZAPP), un pigmento anticorrosivo comercial. Los resultados obtenidos permiten concluir que los extractos de las tres especies vegetales inhiben la corrosión del acero SAE 1010 de manera comparable a la efectuada por ZAPP, siendo el extracto de Plectranthus coleoides el que presenta la mejor acción anticorrosiva.

show abstract

Influence of novel ammonium-modified zinc-free phosphate nanofillers on anticorrosive features of primer-less polyurethane top-coating compositions

2018

View full text Add to dashboard Cite

Anticorrosive polyurethane coating compositions were compounded using novel zinc-free nanosized phosphates: aluminum ammonium phosphates (AAP) or calcium aluminum ammonium phosphates (CAAP). For comparison, a nanosized strontium phosphate (SP), AAP/SP mixtures, and a microsized zinc phosphate (ZP) were tested. Paints containing ammonium-modified phosphates exhibited similar or a slightly higher viscosity than systems with SP or ZP. Nevertheless, coatings with the AAP or CAAP reached significantly better gloss and adhesion to a steel substrate as well as a slightly higher hardness. Results of a salt spray test showed that anticorrosive properties of the coatings containing AAP/SP mixtures were markedly better in relation to the systems containing solely AAP, CAAP, SP, or ZP. Electrochemical tests revealed the best barrier/anticorrosive features for AAP (electrochemical impedance spectroscopy and potentiodynamic polarization) or SP and CAAP (a novel electrochemical noise technique).

show abstract

Infrared-spectroscopy analysis of zinc phosphate and nickel and manganese modified zinc phosphate coatings on electrogalvanized steel

Cited by 10 publications

References 9 publications

Stacked Lamellar Matrix Enabling Regulated Deposition and Superior Thermo‐Kinetics for Advanced Aqueous Zn‐Ion System under Practical Conditions

Stacked Lamellar Matrix Enabling Regulated Deposition and Superior Thermo‐Kinetics for Advanced Aqueous Zn‐Ion System under Practical Conditions

Estudio de las propiedades anticorrosivas sobre acero SAE 1010 de extractos acuosos de romero (Rosmarinus officinalis), laurel (Laurus nobilis) y falso incienso (Plectranthus coleoides)

Influence of novel ammonium-modified zinc-free phosphate nanofillers on anticorrosive features of primer-less polyurethane top-coating compositions

Contact Info

Product

Resources

About