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Roughening of hollow glass microspheres by NaF for Ni electroless plating
- Source :
- Surface and Coatings Technology. 359:62-72
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Roughening of non-conductive substrate ceramic materials with hydrofluoric acid (HF) is usually an essential step to enhance adhesion of the coating by electroless chemical plating. However, the violent reaction between HF and the hollow glass microspheres (HGMs) usually causes breakage and damage of the thin shells of HGMs. This paper proposes a modified roughening strategy for Ni electroless plating, i.e., eroding HGMS slowly with a mixture of sodium fluoride (NaF) and hydrochloric acid (HCl). The Na2SiF6 by-products from the reaction of NaF with SiO2 were erased by the following NaOH washing to expose the surface of HGMs without any obvious pores or breakage. Such a modified roughening and followed alkali washing strategy can thus not only reduce the surface corrosion, but also hinder the further damage of HGMs by covering Na2SiF6 sediments. The successive plating of uniform Ni nanoparticles on HGMs was conducted, and the related mechanism was discussed in detail.
- Subjects :
- 010302 applied physics
Materials science
Substrate (chemistry)
Nanoparticle
Hydrochloric acid
02 engineering and technology
Surfaces and Interfaces
General Chemistry
engineering.material
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Surfaces, Coatings and Films
Glass microsphere
chemistry.chemical_compound
Hydrofluoric acid
Coating
Chemical engineering
chemistry
Breakage
Plating
0103 physical sciences
Materials Chemistry
engineering
0210 nano-technology
Subjects
Details
- ISSN :
- 02578972
- Volume :
- 359
- Database :
- OpenAIRE
- Journal :
- Surface and Coatings Technology
- Accession number :
- edsair.doi...........d4a7cda2451ad308a22b0ad4f7629e83