Corrosion characterization of Cu–Sn intermetallics in 3.5wt.% NaCl solution

Tsao, L. C.; Chen, C.W.

doi:10.1016/j.corsci.2012.06.015

Cited by 52 publications

(15 citation statements)

References 27 publications

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“…The passive range, ΔE (=E corr −E b ), is defined by the difference between corrosion potential (E corr ) and breakdown potential (E b ). This behavior is associated with defects such as micro-pores, which promote a fast increase in the current density [24]. In Ti 7 Cu samples, the lower values of ΔE show less stable passivation (1340.3 mV Ag/AgCl vs. 1604.8 mV Ag/AgCl for Ti 7 Cu 5 Sn).…”

Section: Potentiodynamic Polarizationmentioning

confidence: 93%

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Effect of Sn addition on the corrosion behavior of Ti–7Cu–Sn cast alloys for biomedical applications

Tsao

2015

Materials Science and Engineering: C

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Section: Potentiodynamic Polarizationmentioning

confidence: 93%

“…Another, Zhou et al carried out the major components on the corroded surface of Zr 2.5 Sn alloy are ZrO 2 and SnO 2 [25]. In conclusion, this passive film may consist of rich-TiO 2 , and a little quantity of CuO and SnO 2 [24,34]. In a previous literature, the toxicity and biocompatibility of Sn have been extensively studied.…”

Section: Eismentioning

confidence: 95%

Effect of Sn addition on the corrosion behavior of Ti–7Cu–Sn cast alloys for biomedical applications

Tsao

2015

Materials Science and Engineering: C

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“…Es decir, a medida que aumenta el porcentaje de estaño en las aleaciones el potencial de corrosión tiende a valores más nobles [24]. Es decir, cuanto menor es la cantidad de estaño posee la aleación el potencial de de corrosión tiende a valores más negativos, lo cual concuerda con lo mencionado por LIU et al [25].…”

Section: Medidas De Polarización Potenciodinámicasunclassified

“…Para esta reacción de deshidratación, G es -42 kJ mol-1 [24], por lo tanto, la formación de SnO 2 se ve favorecida termodinámicamente [19].…”

Section: Medidas De Polarización Potenciodinámicasunclassified

Análisis de la resistencia a la corrosión en lluvia ácida simulada de lasaleaciones Zn-Sn

2015

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RESUMENEl zinc y el estaño, junto con las aleaciones Zn-Sn, son empleados en la industria como recubrimientos del acero frente a la corrosión. Uno de sus usos más frecuentes es el galvanizado para exteriores, el cual es afectado por la corrosión debido a la lluvia ácida.El objetivo del trabajo es evaluar el comportamiento electroquímico que presentan las aleaciones Zn-Sn, con respecto a los metales puros, en una solución acuosa de lluvia ácida simulada compuesta por 31,85 mg/L H 2 SO 4 , 15,75 mg/L HNO 3 , 21,25 mg/L NaNO 3 , 46,20 mg/L (NH 4 ) 2 SO 4 , 31,95 mg/L Na 2 SO 4 , 84,85 mg/L NaCl, con un pH entre 3,5 y 4,0, a temperatura ambiente (25ºC). Para ello, se emplearon probetas de aleaciones con diferentes porcentajes en peso de estaño (6, 10 y 50), y de los metales puros, solidificadas horizontalmente.Se tomaron muestras de cada estructura de grano revelada y se las desbastaron con papeles de SiC, de granulometría entre #60 y #1200. Posteriormente, se realizaron medidas de polarización potenciodinámica en una celda electroquímica convencional de tres electrodos y ensayos de inmersión. Cada probeta se examinó mediante microscopia óptica, antes y después de realizar los ensayos.De las curvas potenciodinámicas se observó para los cortes transversales, que a medida que aumenta el contenido de estaño en la aleación, los potenciales tienden a valores más nobles. A partir de los ensayos de inmersión se denotó que la estructura columnar de zinc y las aleaciones presentan una mayor pérdida de masa que las demás estructuras. Además, el zinc y las aleaciones presentaron la velocidad máxima de corrosión al primer día de inmersión, para todas las estructuras de grano. En las micrografías se evidenció que el zinc presentó corrosión generalizada.Palabras clave: Aleaciones Zn-Sn, Lluvia ácida, Corrosión. ABSTRACTZinc and tin, together with Zn-Sn alloys are used in industrial operations and steel coatings against corrosion. One of its most common uses is the galvanizing process for outdoor structures, which is affected by corrosion caused by acid rain.The aim of the study is to evaluate the electrochemical behavior of Zn-Sn alloys with respect to pure metals, in an aqueous simulated acid rain solution consisting of 31.85 mg/L H 2 SO 4 , 15.75 mg/L HNO 3 , 21.25 mg /L NaNO 3 , 46.20 mg/L (NH 4 ) 2 SO 4 , 31.95 mg/L Na 2 SO 4 , 84.85 mg/L NaCl, at a pH between 3,5 and 4,0, at room temperature (25°C). Zn-Sn alloys samples were used with different percentages of tin (6 wt. % Sn, 10 wt. % Sn and 50 wt. % Sn), and pure metals samples. The samples were obtained by horizontal directional solidification.Samples of each of the revealed structures were taken and roughed with papers of SiC, of grain size between # 60 and # 1200. Subsequently, potentiodynamic polarization essays were performed in a conventional three electrode electrochemical cell and immersion tests. Each ones was examined by optical microscopy, before

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“…Gao et al [8] revealed the different corrosion behaviors between Sn-0.75Cu solder and Sn-0.75Cu/Cu joint with the former performed better. Some scientific research [10,11,12] found that intermetallics of Sn-Cu solders played an important role in the process of corrosion and their corrosion products. These corrosion products have been detected to evaluate their behaviors.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Rare Earths Additions on the Microstructure and the Corrosion Behavior of Sn-0.7Cu-0.075Al Solder Alloy

Yang

et al. 2019

Materials

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Sn-0.7Cu-0.075Al solder alloy adding with Ce and La had been successfully prepared by applying ball-milling and vacuum arc remelting. The influence of Ce and La on microstructure and corrosion behavior of Sn-0.7Cu-0.075Al solder alloy was investigated. The results showed that Ce (La)-containing solders had refined grains and obvious directional tendency due to the dispersive refiner (CeO2 and La2O3). Electrochemical potentiodynamic curves revealed three different stages of the reaction, including anodic and cathodic processes, prepassivation section, and stable passivation stages. The self-corrosion potential (Ecorr) of alloys with Ce and La addition were a little bit more negative, hardly making a difference on corrosion occurrence. However, the corrosion current density (Icorr) and passivation current density (Ip) decreased by two-thirds and one-half respectively, which indicated a better corrosion resistant after adding rare earths. The recorded micrographs of corroded surface at different polarized points witnessed the formation of corrosion product film both on prepassivation and passivation stage. Moreover, the cross section of corrosion product film showed the coarse, loose film in Sn-0.7Cu-0.075Al solder and adherent, compact film in Ce (La)-containing solders, which further indicated an excellent anti-corrosion property.

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Corrosion characterization of Cu–Sn intermetallics in 3.5wt.% NaCl solution

Cited by 52 publications

References 27 publications

Effect of Sn addition on the corrosion behavior of Ti–7Cu–Sn cast alloys for biomedical applications

Effect of Sn addition on the corrosion behavior of Ti–7Cu–Sn cast alloys for biomedical applications

Análisis de la resistencia a la corrosión en lluvia ácida simulada de lasaleaciones Zn-Sn

The Effect of Rare Earths Additions on the Microstructure and the Corrosion Behavior of Sn-0.7Cu-0.075Al Solder Alloy

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