High Voltage (Jul 2019)
Interfacial bonding enhancement of the RTV recoating with sandwiched contaminant by plasma jet
- Shanshan Wang,
- Shuang Li,
- Shuang Li,
- Jianjun Li,
- Jianjun Li,
- Ruobing Zhang,
- Hui Liu
Affiliations
- Shanshan Wang
- Graduate School at Shenzhen, Tsinghua University
- Shuang Li
- Graduate School at Shenzhen, Tsinghua University
- Shuang Li
- Graduate School at Shenzhen, Tsinghua University
- Jianjun Li
- Graduate School at Shenzhen, Tsinghua University
- Jianjun Li
- Graduate School at Shenzhen, Tsinghua University
- Ruobing Zhang
- Graduate School at Shenzhen, Tsinghua University
- Hui Liu
- State Grid Shandong Electric Power Research Institute
Abstract
Room temperature vulcanised (RTV) silicone rubber is widely used in electrical power system, applied to the glass or porcelain insulator surface to enhance insulation. RTV coatings get contaminated after long-term operation and need to be recoated. Contaminants accumulate and embed into the surface of base RTV coating, forming a hard-to-remove inorganic transition layer. Such sandwiched contaminant layer destroys the adhesion between original and reapplied silicone rubber coating greatly. Authors’ study innovatively reports a method to enhance interfacial bond properties of the RTV recoating with sandwiched contaminant layer, by using an atmospheric-pulsed discharge plasma jet (APPJ) for surface treatment. Water boiling test and 180-degree peel test were conducted to evaluate interfacial bond properties macroscopically. Scanning electron microscopy (SEM) was applied to observe the cross-section of recoating interface, while Fourier-transform infrared spectroscopy (FTIR) to detect chemical changes of contaminant layer, giving out microscopic and theoretical explanation.
Keywords
- insulator testing
- plasma materials processing
- silicone rubber
- coatings
- vulcanisation
- porcelain insulators
- plasma jets
- scanning electron microscopy
- discharges (electric)
- insulating coatings
- silicone rubber insulators
- adhesion
- surface treatment
- fourier transform infrared spectra
- electrical power system
- porcelain insulator surface
- insulation
- rtv coatings
- long-term operation
- base rtv coating
- inorganic transition layer
- sandwiched contaminant layer
- original reapplied silicone rubber coating
- interfacial bond properties
- rtv recoating
- surface treatment
- 180-degree peel test
- interfacial bonding enhancement
- room temperature
- glass insulator surface
- rtv silicone rubber
- vulcanised silicone rubber
- adhesion
- atmospheric pulsed discharge plasma jet
- water boiling test
- scanning electron microscopy
- sem
- recoating interface cross-section
- fourier transform infrared spectroscopy
- ftir
- chemical changes
- temperature 293 k to 298 k