Multi-Node Sensor for Corrosion Monitoring – Characteristics and Configuration


  1. Rinaldi, G.
  2. Huber, T.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
In this Technical Memorandum, the ongoing study for the development of a polyaniline-based, interdigitated electrode, aluminum corrosion sensor is presented with the aim to provide (i) a concise overview of the aluminum corrosion mechanisms in conditions similar to what may be expected for aircraft in coastal or marine environments, and (ii) present a sensing criterion, and sensor development, based on the electrochemical dissolution processes for aluminum. In this regard, moisture, chloride, and hydrogen are considered as the primary target species for sensing, and oxygen, pH, or electrical charge identified as possible secondary targets. Based on these determinations the proposed sensor design will incorporate four individual interdigitated electrode sensing nodes. A node-specific-doped conducting polyaniline layer sensitized to the target species is suggested as the active component of the sensor. The polyaniline doping requirements for the sensitization to a given target species is outlined along with a brief discussion on the inclusion of carbon nanotubes, for increased conductivity, within the polyaniline layer.

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Report Number
DRDC-ATLANTIC-TM-2010-113 — Technical Memorandum
Date of publication
01 Aug 2010
Number of Pages
Electronic Document(PDF)

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