Corrosion protection properties of anodic oxide coatings on an Al–Si alloy

Li, X.; Nie, Xueyuan; Wang, L.; Northwood, Derek O.

doi:10.1016/j.surfcoat.2005.08.019

Cited by 99 publications

(71 citation statements)

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“…This is because of the unique properties of Al, which include low density, lustrous appearance, relatively good corrosion resistance as well as excellent thermal and electrical conductivity [1][2][3]. Al has the intrinsic characteristic of exhibiting initial corrosion resistance in aqueous environments due to the formation of passive oxide film on its surface.…”

Section: Introductionmentioning

confidence: 99%

“…More so, studies that attempt to explore the complex aggregative interactions of macrocylic compounds in aqueous acidic environments in combination with synergistic interactions with KI and the resulting effects on corrosion inhibition potentials are very scanty. This has motivated us to carry out the present study to investigate the inhibition potentials of seven macrocyclic compounds comprising four phthalocyanines and three naphthalocyanines namely, 1,4,8,11,15,18,22,25-octabutoxy-29H,31H-phthalocyanine (Pc1), 2,3,9,10,16,17,23,24-octabutoxy (octyloxy)-29H,31H-phthalocyanine (Pc2), 2,9,16,23-tetra-tert-butyl-29H,31H-phthalocyanine (Pc3), 29H,31H-phthalocyanine (Pc4), 5,9,14,18,23,27,32,36-octabutoxy-2,3-naphthalocyanine (nPc1), 2,11,20,29-tetra-tert-butyl-2,3-naphthalocyanine (nPc2) and 2,3-naphthalocyanine (nPc3) as well as their synergistic interactions with I − ions on the corrosion of aluminium in aqueous hydrochloric acid. The adsorption behaviour and corrosion inhibition potentials of these compounds in the absence and presence of I − ions were investigated using a gravimetric method, electrochemical techniques and quantum chemical calculations.…”

Section: Introductionmentioning

confidence: 99%

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mentioning

confidence: 99%

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Some Phthalocyanine and Naphthalocyanine Derivatives as Corrosion Inhibitors for Aluminium in Acidic Medium: Experimental, Quantum Chemical Calculations, QSAR Studies and Synergistic Effect of Iodide Ions

et al. 2015

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Abstract:The effects of seven macrocyclic compounds comprising four phthalocyanines (Pcs) namely 1,4,8,11,15,18,22,2,3,9,10,16,17,23,2,9,16, and 29H,31H-phthalocyanine (Pc4), and three naphthalocyanines namely 5,9,14,18,23,27,32,2,11,20, properties of the compounds were also investigated. All the studied compounds showed appreciable inhibition efficiencies, which decrease with increasing temperature from 30 °C to 70 °C. At each concentration of the inhibitor, addition of 0.1% KI increased the inhibition efficiency compared to the absence of KI indicating the occurrence of synergistic interactions between the studied molecules and I − ions. From the potentiodynamic polarization studies, the studied Pcs and nPcs are mixed type corrosion inhibitors both without and with addition of KI. The adsorption of the studied molecules on Al surface obeys the Langmuir adsorption isotherm, while the thermodynamic and kinetic parameters revealed that the adsorption of the studied compounds on Al surface is spontaneous and involves competitive physisorption and chemisorption mechanisms. The experimental results revealed the aggregated interactions between the inhibitor molecules and the results further indicated that the peripheral groups on the compounds affect these interactions. The calculated quantum chemical parameters and the QSAR results revealed the possibility of strong interactions between the studied inhibitors and metal surface. QSAR analysis on the quantum chemical parameters obtained with B3LYP/6-31G (d,p) method show that a combination of two quantum chemical parameters to form a composite index provides the best correlation with the experimental data.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…

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confidence: 99%

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Some Phthalocyanine and Naphthalocyanine Derivatives as Corrosion Inhibitors for Aluminium in Acidic Medium: Experimental, Quantum Chemical Calculations, QSAR Studies and Synergistic Effect of Iodide Ions

et al. 2015

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“…A summary of the results of the potentiodynamic corrosion tests is given in Table 2 and 3. All coated samples at different immersion times showed higher corrosion resistance than the 304 SS substrate (all are increased by about one order of magnitude) [18]. The polarization resistance is inversely proportional to the current density.…”

Section: Resultsmentioning

confidence: 87%

Corrosion studies of DC reactive magnetron sputtered alumina coating on 304 SS

Thangaraj¹,

Mahadevan²

2017

Electrochemical Energy Technology

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Aluminum oxide films on SS 304 deposited by DC reactive magnetron sputtering technique were studied with respect to the composition of the sputter gas (Ar:O 2 ), gas pressure, substrate temperature, current etc. to achieve good insulating films with high corrosion resistance. The films were characterized by XRD and SEM techniques. Potentiodynamic polarization and electrochemical impedance spectroscopy measurements were made under static conditions in order to evaluate the corrosion performance of the alumina-coated SS 304 for various immersion durations in 0.5 M and 1 M NaCl solution. Alumina-coated SS 304 has low corrosion value of 0.4550 and 1.1090 MPY for 24 h immersion time in both solutions. The impedance plots for the alumina coated SS 304 in 1 M NaCl solution at different durations are slightly different to when compared to its immersion in 0.5 M NaCl solutions and are composed of two depressed semi circles. For the alumina coated film, the impedance spectrum decreased, when immersion time increased.

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“…Las propiedades mecánicas de los anodizados son de gran importancia y por medio del estudio del coeficiente de fricción de la superficie anodizada se hace posible comparar de manera cualitativa cuanto es la resistencia relativa de esta capa de óxido ante la tribocorrosión [6]. Para el estudio de estos recubrimientos, se realizan ensayos de corrosión, entre los cuales se encuentran técnicas electroquímicas como los ensayos de polarización, resistencia a la polarización y potencial a circuito abierto [7], así como ensayos en cámara de niebla salina y ensayos de desgaste. Actualmente, es de especial interés conocer el efecto combinado del desgaste y la corrosión, lo cual constituye el 5 % de las causas de fallos de los elementos de máquinas en el sector industrial, situándolo en el quinto puesto de los mecanismos de degradación más importantes en los términos del coste por fallo prematuro.…”

Section: Introductionunclassified

Desempeño Ante La Corrosión Y Tribocorrosión De Aleaciones Comerciales De Aluminio Anodizadas

Rodriguez

López

et al. 2016

ings

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Recibido: 21-09-2016, aprobado tras revisión: 27-10-2016 Forma sugerida de citación: Rodríguez, S.; Carrasquero, E.; López, L. y Fajardo, J. (2016). «Desempeño ante la corrosión y tribocorrosión de aleaciones comerciales de aluminio anodizadas». Ingenius. N.• 16, (Julio-Diciembre). pp. 64-72. ISSN: 1390-650X. Resumen AbstractEl presente trabajo muestra la evaluación del desempeño de dos aleaciones comerciales de aluminio anodizadas ante la corrosión y tribocorrosión. Para el anodizado se emplearon dos tipos de electrolitos distintos (H 2 SO 4 y H 2 C 2 O 4 ), un valor constante de densidad de corriente y dos tiempos de anodizado (30 y 45 minutos). Usando una de las técnicas de microscopía electrónica de barrido (MEB) y espectroscopía por dispersión de la energía de rayos X (EDX) se caracterizaron las aleaciones y la morfología de las superficies formadas en las capas de óxido para las condiciones establecidas. Se encontraron diferencias notables entre la condición de anodizado (A1) a 45 minutos en H 2 SO 4 para la aleación AA6061, y la condición de anodizado (D1) para el mismo tiempo en H 2 C 2 O 4 para la aleación AA8011. En la condición de anodizado (A1) se encontró la formación de la morfología tipo smudge distintiva de la solución electrolítica utilizada, con un espesor promedio de capa anódica de 5,95 ± 0,02 µm, mientras que, para la condición de anodizado (D1) se obtuvo un espesor de 3,14 ± 0,02 µm, con la aparición de cavidades en toda la extensión de su superficie.In this work were studied two commercial anodized aluminum alloys under conditions of corrosion and tribocorrosion. For two different types of anodizing electrolyte (H 2 SO 4 and H 2 C 2 O 4 ), a constant value of current density and two anodizing time (30 and 45 minutes) were used. Using techniques of Scanning Electron Microscopy (SEM) with Spectroscopy Energy Dispersive X-Ray (EDS) coupled, were characterized the alloys and morphologies of the surfaces formed in the oxide layers. Results obtained show large differences between the condition of anodized (A1) in sulfuric acid for 45 minutes in AA6061 alloy and anodized condition (D1) for the same time in oxalic acid for alloy AA8011. For sample (A1), the results reveals the formation of a morphology named "smudge" which is characteristic of the electrolytic solution used and for this case the average thickness was 5,95 ± 0,02 µm. For sample (D1), the average thickness was 3,14 ± 0,02 µm and revealing the generation of cavities along all surface area. 64 Rodríguez et al. / Desempeño ante la corrosión y tribocorrosión de aleaciones comerciales de aluminio anodizadas 65Tanto para los ensayos de corrosión en cámara de niebla salina, electroquímicos de polarización potenciodinámica y tribocorrosión, se encontró que el mejor desempeño fue registrado en la condición de anodizado (A1), con una menor ganancia promedio de masa, densidad de corriente de corrosión y coeficiente de fricción. Todas las condiciones de anodizado mejoraron el comportamiento ante ensayos de degradación acelerada, en comparación ...

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Corrosion protection properties of anodic oxide coatings on an Al–Si alloy

Cited by 99 publications

References 12 publications

Some Phthalocyanine and Naphthalocyanine Derivatives as Corrosion Inhibitors for Aluminium in Acidic Medium: Experimental, Quantum Chemical Calculations, QSAR Studies and Synergistic Effect of Iodide Ions

Some Phthalocyanine and Naphthalocyanine Derivatives as Corrosion Inhibitors for Aluminium in Acidic Medium: Experimental, Quantum Chemical Calculations, QSAR Studies and Synergistic Effect of Iodide Ions

Corrosion studies of DC reactive magnetron sputtered alumina coating on 304 SS

Desempeño Ante La Corrosión Y Tribocorrosión De Aleaciones Comerciales De Aluminio Anodizadas

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