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Electrochemical impedance spectroscopy (EIS) as a tool for measuring corrosion of polymer-coated fasteners used in treated woodAuthor(s): Samuel L. Zelinka; Lorraine Ortiz-Candelaria; Donald S. Stone; Douglas R. Rammer
Source: Forest products journal. Vol. 59, nos. 1/2 (Jan./Feb. 2009): Pages 77-82.
Publication Series: Miscellaneous Publication
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DescriptionCurrently, many of the polymer-coated fasteners on the market are designed for improved corrosion performance in treated wood; yet, there is no way to evaluate their corrosion performance. In this study, a common technique for measuring the corrosion performance of polymer-coated metals, electrochemical impedance spectroscopy (EIS), was used to evaluate commercial fasteners in a water extract of treated wood. Fasteners were tested in an "out of the box" condition as well as after being driven into the wood to simulate service conditions. The EIS spectra were fit to the traditional model for polymer-coated metals where the capacitors were replaced with constant-phase elements. A low frequency corrosion-time constant was measured for all of the fasteners in the out of the box condition, which implies that the barrier properties of the coating had failed before they were used.
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CitationZelinka, Samuel L.; Ortiz-Candelaria, Lorraine; Stone, Donald S.; Rammer, Douglas R. 2009. Electrochemical impedance spectroscopy (EIS) as a tool for measuring corrosion of polymer-coated fasteners used in treated wood. Forest Products Journal 59(1/2): 77-82.
KeywordsPlastic coating, coatings, deterioration, accelerated life testing, metals, testing, corrosion, anti-corrosives, fasteners, joints, wood preservatives, alkaline copper quat, electrical impedance spectroscopy, treated wood, connectors, accelerated testing, ACQ
- Synthesis of published and unpublished corrosion data from long term tests of fasteners embedded in wood : calculation of corrosion rates and the effect of corrosion on lateral joint strength
- Corrosion rates of fasteners in treated wood exposed to 100% relative humidity
- The use of electrochemical impedance spectroscopy (EIS) to measure the corrosion of metals in contact with wood
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