Surfactant Influence on Zn-Co-SiO2 Composite Plating from Sulfate Solutions.

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  • 硫酸浴からのＺｎ‐Ｃｏ‐シリカ複合めっきに及ぼす界面活性剤の影響
  • リュウサンヨク カラ ノ Zn Co シリカ フクゴウ メッキ ニ オヨボス

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Abstract

In response to growing needs for improved corrosion resistance in the steel parts of automobiles and aircraft, plating with Zn-based alloys is being applied in place of pure Zn plating. Zn-based composite plating is also expected to exhibit better corrosion resistance than pure Zn or Zn-alloy plating due to the existence of dispersed particles.<br>Experiments were undertaken to determine the dependence of Zn-Co-SiO2 composite plating electrodeposition and surface morphology from sulfate solutions on surfactants.<br>We found that the SiO2 content of deposits without surfactants increased with SiO2 concentration in the bath, but not for those with surfactants. The SiO2 content depended on the SiO2 concentration and the cathode current density. Despite identical plating conditions, surfactant addition is lowered the deposit's Co content and greatly affected the crystal structure and surface morphology.

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