Electrochemical assessment of spray-applied thermoplastic coating barrier properties
Flame-sprayed thermoplastic powder coatings act as barrier-type coatings for corrosion protection. Characteristic electrical properties for this type of coating are high resistance and capacitance, and low permeability to water and ions. Electrochemical impedance spectroscopy was used to evaluate th...
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| Veröffentlicht in: | Journal of materials engineering and performance 1997-08, Vol.6 (4), p.417-420 |
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| container_title | Journal of materials engineering and performance |
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| creator | JEFFCOATE, C. S WOCKEN, T. L BIERWAGEN, G. P |
| description | Flame-sprayed thermoplastic powder coatings act as barrier-type coatings for corrosion protection. Characteristic electrical properties for this type of coating are high resistance and capacitance, and low permeability to water and ions. Electrochemical impedance spectroscopy was used to evaluate the corrosion protection performance and electrical resistance of this type of coating during immersion in 3% NaCl solution. The variations with time of impedance and capacitance of two types of this coating, blue and black, were measured at three immersion temperatures (22, 50, and 80 degree C). The impedance of both coatings remained consistently high when the solution temperature was maintained around ambient (22 degree C). At the higher temperature of 50 degree C, both coatings performed well initially, then showed signs of damage by a drop in the impedance. Both samples maintained at 80 degree C failed after 12 and 25 days for the blue and the black coatings, respectively, with blistering occurring on both panels. |
| doi_str_mv | 10.1007/s11665-997-0110-4 |
| format | Article |
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At the higher temperature of 50 degree C, both coatings performed well initially, then showed signs of damage by a drop in the impedance. Both samples maintained at 80 degree C failed after 12 and 25 days for the blue and the black coatings, respectively, with blistering occurring on both panels.</description><identifier>ISSN: 1059-9495</identifier><identifier>EISSN: 1544-1024</identifier><identifier>DOI: 10.1007/s11665-997-0110-4</identifier><identifier>CODEN: JMEPEG</identifier><language>eng</language><publisher>New York, NY: Springer</publisher><subject>Applied sciences ; Capacitance ; Coating ; Corrosion prevention ; Electrochemical impedance spectroscopy ; Exact sciences and technology ; Immersion ; Impedance ; Metals. 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The impedance of both coatings remained consistently high when the solution temperature was maintained around ambient (22 degree C). At the higher temperature of 50 degree C, both coatings performed well initially, then showed signs of damage by a drop in the impedance. Both samples maintained at 80 degree C failed after 12 and 25 days for the blue and the black coatings, respectively, with blistering occurring on both panels.</description><subject>Applied sciences</subject><subject>Capacitance</subject><subject>Coating</subject><subject>Corrosion prevention</subject><subject>Electrochemical impedance spectroscopy</subject><subject>Exact sciences and technology</subject><subject>Immersion</subject><subject>Impedance</subject><subject>Metals. 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| source | SpringerNature Journals |
| subjects | Applied sciences Capacitance Coating Corrosion prevention Electrochemical impedance spectroscopy Exact sciences and technology Immersion Impedance Metals. Metallurgy Nonmetallic coatings Production techniques Protective coatings Surface treatment Thermoplastic resins |
| title | Electrochemical assessment of spray-applied thermoplastic coating barrier properties |
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