Chemical changes at the surface of RTV silicone rubber coatings on insulators during dry-band arcing

Kim, Seog-Hyeon; Cherney, E.A.; Hackam, R.; Rutherford, K. G.

doi:10.1109/94.300238

Cited by 168 publications

(20 citation statements)

References 15 publications

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“…The effect of corona time on thehydrophobicit recovery speed In the experiment, after apply the corona discharge to RTV specimen continuously for 12, 24, 36, 48, 60, 72, 84, 96, 120, 130 hours respectively, the correlation curves of static contact angle recovery with time of each specimen are shown in Figure 5. RTV material physical and chemical character will changes under corona discharge, so the hydrophobicity recovery process is also affected by corona [1][2][3][4]. During the process of the corona and after the corona, the physical and chemical changes have two sides effects on the RTV hydrophobicity recovery process [1][2][3][4] [8][9].…”

Section: Hydrophobicity the Recoverymentioning

confidence: 99%

“…RTV material physical and chemical character will changes under corona discharge, so the hydrophobicity recovery process is also affected by corona [1][2][3][4]. During the process of the corona and after the corona, the physical and chemical changes have two sides effects on the RTV hydrophobicity recovery process [1][2][3][4] [8][9].…”

Section: Hydrophobicity the Recoverymentioning

confidence: 99%

“…According to the experiment and phenomena in this paper, the main reasons of RTV hydrophobicity loss caused by the corona discharge is as following [1][2][3][4] [6,7]:…”

Section: B the Mechanism Of Corona Discharge Makes Rtv Silicone Rubbmentioning

confidence: 99%

“…However, as an organic material, RTV's aging speed is faster than inorganic materials, and domestic and foreign research showed that corona discharge is one of the main reasons that cause the RTV ageing and hydrophobicity loss [1,2]. The chemical reactions and the surface physical change cause by corona are the reasons for the hydrophobicity loss, and also affect their hydrophobicity recovery [2][3][4], so the effect character of corona on the hydrophobicity loss and recovery needs further research [3,4].…”

Section: Introductionmentioning

confidence: 99%

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RTV silicone rubber hydrophobicity loss and recovery character under AC corona

Dai

Wang

Lü

2011

2011 International Conference on Electrical and Control Engineering

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In this paper, the effect of AC Corona on the hydrophobicity of room temperature vulcanizing (RTV) silicone rubber materials is studied with a pin-plate electrode corona accelerate aging model. Experiments show that AC corona can make the RTV specimen hydrophobicity lose rapidly, further, the hydrophobicity recovery character of RTV specimen is also researched through a long time of corona test, as a result, it is found that the RTV specimen hydrophobicity recovery speed is not continuous, but having an alternate process of "speed up" and "slow down". After corona time reaches a certain time, the hydrophobicity recovery time dramatically becomes longer but it still can not fully restore to the initial value in the end. meanwhile research find that when the corona time is in a certain range, after the hydrophobicity recovery, the final static contact angle is much larger than the initial value before the corona.

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Section: Hydrophobicity the Recoverymentioning

confidence: 99%

Section: Hydrophobicity the Recoverymentioning

confidence: 99%

“…According to the experiment and phenomena in this paper, the main reasons of RTV hydrophobicity loss caused by the corona discharge is as following [1][2][3][4] [6,7]:…”

Section: B the Mechanism Of Corona Discharge Makes Rtv Silicone Rubbmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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RTV silicone rubber hydrophobicity loss and recovery character under AC corona

Dai

Wang

Lü

2011

2011 International Conference on Electrical and Control Engineering

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“…Many publications have provided material studies on artificially aged polymeric samples [3,4]. However, material studies on service-aged insulators are still scarce due to relatively limited service experience.…”

Section: Introductionmentioning

confidence: 99%

Characterization of field-aged 400 kV silicone rubber composite insulators

Xiong

Rowland

Robertson

et al. 2006

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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A number of silicone rubber composite insulators have been removed after 15 years of service on a coastal 400 kV transmission line in the UK. Extensive analysis of their surface degradation is provided along with a description of their appearance. Material analysis shows cracking and oxidation of the surface. Ageing effects were far from uniform over each shed, the greatest oxidation being on the top surfaces of the sheds on the south side. Microscopy, EDX and FTIR were found to be the most useful and effective tools for analysis of these polymeric insulators.

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Characterization of siloxane residues from polydimethylsiloxane elastomers by MALDI-TOF-MS

Hunt

George

2000

Polym. Int.

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The hydophobic recovery properties of polydimethylsiloxane (PDMS) elastomers after environmental degradation arises from the migration of low molecular weight siloxanes from the bulk to the surface. MALDI‐TOF‐MS analysis of the isotopic distribution of oligomers from the surface of vulcanized PDMS has enabled unambiguous assignment of these as predominantly cyclic siloxanes ranging from 13 to 47 repeat units with smaller proportions of methyl and hydroxyl terminated linear chains ranging from 12 to 24 repeat units. © 2000 Society of Chemical Industry.

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Chemical changes at the surface of RTV silicone rubber coatings on insulators during dry-band arcing

Cited by 168 publications

References 15 publications

RTV silicone rubber hydrophobicity loss and recovery character under AC corona

RTV silicone rubber hydrophobicity loss and recovery character under AC corona

Characterization of field-aged 400 kV silicone rubber composite insulators

Characterization of siloxane residues from polydimethylsiloxane elastomers by MALDI-TOF-MS

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