Scholarlink

<p>Stainless steel remains indispensable in engineering and biomedical applications because of its favorable balance of mechanical strength and intrinsic corrosion resistance. However, in aggressive environments such as the oral cavity, additional surface protection is often required. In this work, we present a dual-layer coating strategy for 316&#xa0;L stainless steel that enhances both corrosion resistance and resistance to microbial colonization. The base layer consists of platinum nanoparticles (PtNPs) deposited by radio-frequency (RF) plasma sputtering to create a stable and conductive foundation. On top of this, a platinum-based nanocomposite was synthesized and deposited in situ using pulsed laser ablation in liquid (PLAL), with polyvinylpyrrolidone (PVP) serving as a stabilizer and natural tannins acting as both reducing and bioactive agents. Notably, the PLAL technique enables simultaneous nanoparticle synthesis and direct coating in a single, solvent-free step, offering a clean, rapid, and scalable fabrication route. Electrochemical evaluations—including potentiodynamic polarization, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS)—were carried out in artificial saliva to assess corrosion performance. The coated samples exhibited a pronounced decrease in corrosion current density and a substantial increase in polarization resistance compared with uncoated stainless steel. In addition, antibacterial testing against <i>Streptococcus mutans</i> revealed inhibition zones reaching up to 42&#xa0;mm, confirming strong antimicrobial activity. This synergistic dual-layer system, combining an RF-sputtered PtNP base with a PLAL-fabricated organic–inorganic nanocomposite, demonstrates significant potential as a next-generation multifunctional coating for biomedical applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Corrosion Protection of Stainless Steel by Nanocomposite Coating Prepared by Pulsed Laser Ablation in Liquid

  • 期刊论文

  • 发表日期：

    2025年11月7日

查看全文
  • Noor Qasim Ibrahim,
  • Lubna Ghalib,
  • Layla M. Hasan

摘要

Stainless steel remains indispensable in engineering and biomedical applications because of its favorable balance of mechanical strength and intrinsic corrosion resistance. However, in aggressive environments such as the oral cavity, additional surface protection is often required. In this work, we present a dual-layer coating strategy for 316 L stainless steel that enhances both corrosion resistance and resistance to microbial colonization. The base layer consists of platinum nanoparticles (PtNPs) deposited by radio-frequency (RF) plasma sputtering to create a stable and conductive foundation. On top of this, a platinum-based nanocomposite was synthesized and deposited in situ using pulsed laser ablation in liquid (PLAL), with polyvinylpyrrolidone (PVP) serving as a stabilizer and natural tannins acting as both reducing and bioactive agents. Notably, the PLAL technique enables simultaneous nanoparticle synthesis and direct coating in a single, solvent-free step, offering a clean, rapid, and scalable fabrication route. Electrochemical evaluations—including potentiodynamic polarization, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS)—were carried out in artificial saliva to assess corrosion performance. The coated samples exhibited a pronounced decrease in corrosion current density and a substantial increase in polarization resistance compared with uncoated stainless steel. In addition, antibacterial testing against Streptococcus mutans revealed inhibition zones reaching up to 42 mm, confirming strong antimicrobial activity. This synergistic dual-layer system, combining an RF-sputtered PtNP base with a PLAL-fabricated organic–inorganic nanocomposite, demonstrates significant potential as a next-generation multifunctional coating for biomedical applications.