The polarization characteristics of Pb-free Sn-8.5Zn-XAg-0.1Al-0.05Ga alloy in 3.5% NaCl solution

Udit Surya Mohanty, Kwang-Lung Lin

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The polarization characteristics of Pb-free Sn-8.5Zn-XAg-0.1Al-0.05Ga alloy with varying Ag content were investigated in 3.5% NaCl solution. The value of Ag content i.e X varied from 0.1 wt% to 2 wt%. An increase in the Ag content up to 2 wt% resulted in a progressive increase in the corrosion current density and shifted the corrosion potential (Ecorr) towards more active values. These changes were also reflected in the corrosion rate of the solder alloy. However the linear polarization resistance values decreased with increase in the weight content of silver. Increasing the Ag content from 0.1 to 2 wt% did not show a significant improvement in the passivation behaviour of the solder alloy as reflected in the passivation current density (ip) and critical current density (icc) values. XPS and SIMS depth profile results revealed that the oxides of Zn and Sn were present in high concentrations on the outer surface of the solder alloy along with very low concentration of Al2O3.

Original languageEnglish
Pages (from-to)2815-2831
Number of pages17
JournalCorrosion Science
Volume49
Issue number7
DOIs
Publication statusPublished - 2007 Jul 1

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Soldering alloys
Polarization
Passivation
Current density
Corrosion
Secondary ion mass spectrometry
Corrosion rate
Silver
Oxides
X ray photoelectron spectroscopy

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

Cite this

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title = "The polarization characteristics of Pb-free Sn-8.5Zn-XAg-0.1Al-0.05Ga alloy in 3.5{\%} NaCl solution",
abstract = "The polarization characteristics of Pb-free Sn-8.5Zn-XAg-0.1Al-0.05Ga alloy with varying Ag content were investigated in 3.5{\%} NaCl solution. The value of Ag content i.e X varied from 0.1 wt{\%} to 2 wt{\%}. An increase in the Ag content up to 2 wt{\%} resulted in a progressive increase in the corrosion current density and shifted the corrosion potential (Ecorr) towards more active values. These changes were also reflected in the corrosion rate of the solder alloy. However the linear polarization resistance values decreased with increase in the weight content of silver. Increasing the Ag content from 0.1 to 2 wt{\%} did not show a significant improvement in the passivation behaviour of the solder alloy as reflected in the passivation current density (ip) and critical current density (icc) values. XPS and SIMS depth profile results revealed that the oxides of Zn and Sn were present in high concentrations on the outer surface of the solder alloy along with very low concentration of Al2O3.",
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The polarization characteristics of Pb-free Sn-8.5Zn-XAg-0.1Al-0.05Ga alloy in 3.5% NaCl solution. / Mohanty, Udit Surya; Lin, Kwang-Lung.

In: Corrosion Science, Vol. 49, No. 7, 01.07.2007, p. 2815-2831.

Research output: Contribution to journalArticle

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AB - The polarization characteristics of Pb-free Sn-8.5Zn-XAg-0.1Al-0.05Ga alloy with varying Ag content were investigated in 3.5% NaCl solution. The value of Ag content i.e X varied from 0.1 wt% to 2 wt%. An increase in the Ag content up to 2 wt% resulted in a progressive increase in the corrosion current density and shifted the corrosion potential (Ecorr) towards more active values. These changes were also reflected in the corrosion rate of the solder alloy. However the linear polarization resistance values decreased with increase in the weight content of silver. Increasing the Ag content from 0.1 to 2 wt% did not show a significant improvement in the passivation behaviour of the solder alloy as reflected in the passivation current density (ip) and critical current density (icc) values. XPS and SIMS depth profile results revealed that the oxides of Zn and Sn were present in high concentrations on the outer surface of the solder alloy along with very low concentration of Al2O3.

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