Scholarlink

<p>Achieving an optimal balance between nanoparticle incorporation and dispersion remains a critical challenge in high performance electroless Ni-P nanocomposite coatings. This study investigates the effect of aluminum nitride (AlN) nanoparticle concentration on the transition from dispersion to agglomeration and its influence on corrosion and mechanical performance. Coatings were deposited on mild steel using an acidic electroless bath with AlN concentrations of 0.25, 0.5, and 0.75&#xa0;g/L. Microstructural and compositional analyses confirmed successful incorporation of AlN nanoparticles and revealed concentration dependent changes in phosphorus content, grain refinement, and surface morphology. A transition from insufficient incorporation to uniform dispersion and then to agglomeration dominated behavior was identified with increasing nanoparticle concentration. This change significantly affected surface roughness, coating integrity, and electrochemical behavior. The coating produced at 0.5&#xa0;g/L AlN exhibited the most uniform nanoparticle distribution, lowest surface roughness, and highest coating resistance, resulting in superior corrosion performance. In contrast, the 0.75&#xa0;g/L coating showed particle agglomeration, pore formation, and reduced corrosion resistance despite slightly higher hardness. The increase in hardness with nanoparticle content was attributed to reduced phosphorus content and obstruction of dislocation motion. To provide a comprehensive comparison, a multi-parameter performance index was developed by integrating mechanical, surface, and electrochemical properties. These results demonstrate that the transition from nanoparticle dispersion to agglomeration governs the structure property relationship in electroless Ni-P-AlN coatings, providing a mechanistic basis for optimizing coating performance.</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

Effect of AlN concentration on dispersion–agglomeration behavior and corrosion/mechanical performance of electroless Ni–P coatings

  • 期刊论文

  • 发表日期：

    2026年7月21日

查看全文
  • Mohammadhassan Badihehaghdam,
  • Seyyed Mohammad Mousavi Khoie,
  • Farzaneh Khast

摘要

Achieving an optimal balance between nanoparticle incorporation and dispersion remains a critical challenge in high performance electroless Ni-P nanocomposite coatings. This study investigates the effect of aluminum nitride (AlN) nanoparticle concentration on the transition from dispersion to agglomeration and its influence on corrosion and mechanical performance. Coatings were deposited on mild steel using an acidic electroless bath with AlN concentrations of 0.25, 0.5, and 0.75 g/L. Microstructural and compositional analyses confirmed successful incorporation of AlN nanoparticles and revealed concentration dependent changes in phosphorus content, grain refinement, and surface morphology. A transition from insufficient incorporation to uniform dispersion and then to agglomeration dominated behavior was identified with increasing nanoparticle concentration. This change significantly affected surface roughness, coating integrity, and electrochemical behavior. The coating produced at 0.5 g/L AlN exhibited the most uniform nanoparticle distribution, lowest surface roughness, and highest coating resistance, resulting in superior corrosion performance. In contrast, the 0.75 g/L coating showed particle agglomeration, pore formation, and reduced corrosion resistance despite slightly higher hardness. The increase in hardness with nanoparticle content was attributed to reduced phosphorus content and obstruction of dislocation motion. To provide a comprehensive comparison, a multi-parameter performance index was developed by integrating mechanical, surface, and electrochemical properties. These results demonstrate that the transition from nanoparticle dispersion to agglomeration governs the structure property relationship in electroless Ni-P-AlN coatings, providing a mechanistic basis for optimizing coating performance.